An arrow leaves a bow at 60 m/s at an angle of 30 degrees to the horizon.
60 m/s
30
Which best gives the total time of flight for the arrow before it returns to its original
height?
P.4C
Answers
Answer: 11
Explanation:
Related Questions
a uniform magnetic field of magnitude 1.7 t is directed perpendicular to the plane of a rectangular loop having dimensions 15 cm by 16 cm. find the magnetic flux through the loop.
Answers
A uniform magnetic field of magnitude B exists when the magnetic field strength and direction are the same at all points within the region of interest.
Given: Uniform magnetic field of magnitude 1.7 T Dimension of the loop = 15 cm × 16 cm = 0.15 m × 0.16 m = 0.024 m²
Formula used: Φ = BA, where Φ is the magnetic flux, B is the magnitude of magnetic field and A is the area of the loop perpendicular to the magnetic field, here B is perpendicular to the loop.
Φ = BA
where,B = 1.7 T (Given)
A = 0.024 m² (Given)
Φ = 1.7 × 0.024Φ = 0.0408 Wb
Hence, the magnetic flux through the loop is 0.0408 Wb.
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write voltage drops across the resistor, capacitor, and inductor and the source voltage as a function of time.
Answers
As the charge, ( Q ) is equal and constant, the voltage drop across the capacitor is determined by the value of the capacitor only as V = Q ÷ C.
What is charge?
Charged material experiences a force when it is exposed to an electromagnetic field due to the physical characteristic of electric charge. You might have a positive or negative electric charge. Unlike charges attract one another while like charges repel one another.
As the charge, ( Q ) is equal and constant, the voltage drop across the capacitor is determined by the value of the capacitor only as V = Q ÷ C. A small capacitance value will result in a larger voltage while a large value of capacitance will result in a smaller voltage drop.
While the voltage drop across a resistor is proportional to the current and there is a current at the beginning, the voltage drop across a capacitor is related to its charge and is uncharged at the beginning. However, when charge on the capacitor begins to accumulate, some voltage is now lost across the capacitor.
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A particle of mass and charge is accelerated from rest through a potential difference . (a) Use conservation of energy to find a symbolic expression for the momentum of the particle in terms of , and . Assume the particle's speed isn't relativistic. (b) Write a symbolic expression for the de Broglie wavelength using the result of part (a). (c) If an electron and proton go through the same potential difference but in opposite directions, which particle will have the shorter wavelength?
Answers
Summary: a) The expression for the momentum of the particle can be found by the conservation of energy law. The energy gained by the particle as a result of the potential difference is the potential energy.
By conservation of energy, this energy should be equal to the kinetic energy of the particle gained by acceleration from rest. Conservation of energy implies that the initial and final total energies are equal, thus we can write:
Potential energy (U) = Kinetic energy (K) OrqV=qKqV=12mv2In this expression, q and m represent the charge and mass of the particle, respectively. v is the final velocity of the particle and V is the potential difference applied. Rearranging the above expression we get: v=2qV/m.
By using the classical momentum definition, p=mv, and replacing v in terms of q, m, and V, we get:
p=2qV.
b) The De Broglie wavelength of the particle can be obtained using the momentum expression found in part (a). Recall that the De Broglie wavelength is given by the expression: λ=h/pwhere h is the Planck constant. Replacing p with its expression we obtained in part (a), we get: λ=h/2qV
c) Since the wavelength of the particle is inversely proportional to its momentum, the particle with greater momentum will have the shorter wavelength. From the momentum expression derived above, we can see that the momentum is directly proportional to the charge of the particle. Thus, the proton which has a greater charge than the electron will have the shorter wavelength.
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joshua is attracted toward earth by a 500 -n gravitational force. the earth is attracted toward joshua with a force of zero. 500 n. 250 n. 1000 n. none of the above
Answers
none of the above. According to Newton's third law of motion, for every action, there is an equal and opposite reaction.
In this case, if Joshua is attracted toward Earth by a 500 N gravitational force, then by Newton's third law, Earth is also attracted toward Joshua with an equal and opposite force of 500 N. The gravitational force between two objects is always mutual and equal in magnitude but opposite in direction.
Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object exerts an equal and opposite force on the first object. The forces always occur in pairs and act on two different objects.
For example, if you push against a wall with a certain amount of force, the wall pushes back on you with an equal amount of force in the opposite direction. Another example is the propulsion of a rocket. The rocket pushes exhaust gases backward, and in response, the gases push the rocket forward with an equal force.
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The car is moving forward with 10 N of force but the friction of
the road applies 8 N of force in the opposite direction. What
are the combined forces acting on the car?
Answers
The reason:
The car has 10N of force in one direction and 8N of force in the other direction. The combined forces are 18N
The field between two charged parallel plates is kept constant. If the two plates are brought closer together, the potential difference between the two plates.
Answers
Since the electric field between the plates is constant, If the two plates are brought closer together, the potential difference between the two plates decreases
The relation between potential difference and the electric field is given by ΔV = E.d
Since the electric field is maintained constant, the potential difference is directly inversely proportional to the distance between the plates.
The potential difference between the plates will therefore likewise decrease if the distance between the plates is reduced, we will state in this case.
The energy required to move a unit charge, or one coulomb, from one point to the other in a circuit is measured as the potential difference between the two points. Potential difference is measured in volts or joules per coulomb.
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Which statement regarding characteristics of electromagnetic radiation is correct?
Longer wavelengths of light have higher energies.
Lower frequencies of light have higher energies.
Higher frequencies of light have shorter wavelengths.
Shorter wavelengths of light have lower energies.
Answers
Answer:
Higher frequencies of light have shorter wavelengths.
How is the 12 volt potential difference of the car battery shared between the six heating
elements?
Answers
Answer:
To say we have a 12.0-V battery implies that its terminals have a 12.0-V likely contrast. At the point when such a battery moves charge, it puts the charge through an expected distinction of 12.0 V, and the charge is given an adjustment of potential energy equivalent to Δ U = q Δ V .
six cells
There are six cells to a 12 volt lead corrosive battery. A battery cell's greatest capacity to convey current (amps).
A 12 V lead-stockpiling battery comprises of six cells, each delivering roughly 2 V. The genuine standard cell potential is acquired from the standard decrease possibilities. In light of the positive and negative charges on the battery terminals, an electric potential contrast exists between them.A 6 cell lithium particle pack has an ostensible voltage of 21.6V to 22.2V and a most extreme charge voltage of 25.2 volts
Explanation:
One volt is the likely contrast between two focuses in an electric circuit when 1 joule of work is finished to move charge of 1 coulomb from one highlight other.A completely energized 12 volt battery ought to peruse at 12.6 volts on the multimeter. In the event that the perusing is lower than this, you'll need to accuse your battery of either a battery charger or by taking your vehicle for a drive.A 12 volt 105 AH battery can supply (under wonderful circumstances and to 100 percent release) 12 x 105, or 1260 Watt-hours (1.26 kWh).between 5 to 8 hoursThe short response is that a 200-watt sunlight based charger that creates 1 amp of current takes between 5 to 8 hours to charge a 12-volt vehicle battery totally.A 100Ah 12 volt profound cycle lead-corrosive battery can run a 100W ceaseless DC load for 6 hours whenever released to half as suggested. A 100Ah 12 volt lead-corrosive profound cycle battery could run a 100W evaluated AC food-blender for 7 hours with half Profundity of Release.Voltage contrast among An and B, VAB=(I1+I2)6=(2−1)6=6 volts.Given the impulse acting on an object and the impact time which equation can be used to calculate the force applied to an object
Answers
Answer is D
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The impulse acting on an object and the impact time, the equation F= I / Δt can be used to calculate the force applied to an object, therefore the correct answer is D.
What is impulse?The product of the average applied force and the time for which it is exerted is known as an impulse.
the mathematical relation for impulse is
Impulse = F * Δt
where F represents the force applied and Δt represents the time for which the force is applied
Thus, the correct equation that can be used to calculate the force applied to an object is F = I /Δt and the correct option is D.
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Petroleum is a non -renewable resource. Therefore, its use needs
to be planned so that present and future use can be adequately met.
Explain how the optimal level of use of petroleum can be
achieved.
Answers
Petroleum is a non-renewable resource, which means that it cannot be replenished. Because of this, its usage needs to be planned properly to make sure that there is sufficient availability for present and future needs
The optimal level of use of petroleum can be achieved by several ways which are listed below:
1. Reduce wastage: The optimal level of petroleum use can be achieved by reducing wastage. We should aim to use petroleum products efficiently to minimize wastage and ensure that the resource is not used up too quickly.
2. Develop alternative energy sources: Another way to achieve the optimal level of petroleum use is to develop alternative energy sources. Renewable energy sources like solar, wind, and hydro can be developed to supplement petroleum.
3. Increase efficiency: The third way to achieve the optimal level of petroleum use is to increase efficiency. We can achieve this by improving the efficiency of vehicles and machinery that consume petroleum products.
4. Conservation: Conservation can also help achieve the optimal level of petroleum use. We can conserve petroleum by using it judiciously and avoiding unnecessary use. We can also reduce our reliance on petroleum products by using alternatives like public transport or bicycles.
5. Develop sustainable transportation: Developing sustainable transportation can also help achieve the optimal level of petroleum use. We can develop transportation systems that are more efficient, rely on alternative energy sources, and reduce the amount of petroleum consumed.
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At what point does the comet experience the strongest force of gravity?
o a. point b
o b. point a
o c. point c
o d. point d
Answers
Correct option is C. The comet experiences the strongest force of gravity at point c.
How is the strongest force of gravity experienced by the comet determined?The comet experiences the strongest force of gravity at point C. In a gravitational system, the force of gravity is directly related to the mass of the attracting object and inversely related to the square of the distance between the objects.
At point C, the distance between the comet and the attracting object (such as a planet or a star) is the shortest, resulting in a smaller distance squared. As a result, the force of gravity exerted on the comet at point C is the strongest compared to points A, B, and D, where the distance is greater.
Thus, point C corresponds to the location where the gravitational force is most intense.
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ANSWER PLEASE!!! I NEED THE HORIZONTAL DISPLACEMENT!!!! A small plane is flying at 85 m/s as it passes directly over your brand-new car when a passenger drops his backpack. It takes 9 seconds for the backpack to fall to the ground. You are very worried that the backpack will land on your new car and you wonder if you should move it. What will be the horizontal displacement of the backpack as it fall? Should you move your car?
Answers
Answer: Δx = vxt = (85 m/s)(9s) = ? m
Explanation:
If the plane is in level flight,
Δx = vxt = (85 m/s)(9s) = ? m
Note that if Δx ≠ 0, it will not land on the car.
The values for the horizontal displacement and repositioning of the car are;
As it falls, the backpack will have a maximum horizontal displacement (away from the car) of 795 meters
The car should remain in its current position; Do not move the car
The reason the above values are correct is as follows;
The known information about the airplane, the backpack and the car are;
The speed of the airplane = 85 m/s
The time it takes the backpack to fall to the ground, t = 9 seconds
The position of the airplane when the backpack is dropped = Directly over the brand new car
Required:
The horizontal displacement of the backpack as it fallsShould the car be movedSolution to the first question:
The horizontal displacement of the backpack = Horizontal velocity × Time, t
According to Newton's First Law of motion, the velocity of the backpack at the point it was dropped is the same as the velocity of the airplane
Given that the velocity of the airplane given is the horizontal velocity, we have;
The horizontal velocity of the backpack = 85 m/s
The displacement of the backpack = 85 m/s × 9 s = 795 m
The horizontal displacement of the backpack as it falls = 795 meters in front of the carSolution to the second question:
Given that the backpack will land 795 meters in front, away from the car, the car is safe if it remains in its current position
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The rings of Saturn are composed of chunks of ice that orbit the
planet. The inner radius of the rings is 73,000 km, and the outer
radius is 170,000 km.
Part A) Find the period of an orbiting chunk of
Answers
The period of an orbiting chunk of ice in the rings of Saturn is approximately 333,170.7 years.
The period of an orbiting chunk of ice can be found using Kepler's third law, which states that the square of the period of an orbiting object is proportional to the cube of its average distance from the planet's center.
To find the period, we first need to calculate the average distance of the orbiting chunk of ice from the planet's center. This can be done by finding the average of the inner and outer radii of the rings:
Average distance = (inner radius + outer radius) / 2
= (73,000 km + 170,000 km) / 2
= 121,500 km
Next, we can use Kepler's third law to find the period. Let T represent the period, and r represent the average distance:
T^2 = k * r^3
Solving for T, we get:
T = sqrt(k * r^3)
Since we are only interested in the magnitude of the period, we can disregard the constant k. Thus, the period is given by:
T = sqrt(r^3)
Substituting the value of r, we get:
T = sqrt(121,500^3)
Calculating this, we find:
T ≈ 333,170.7 years
Therefore, the period of an orbiting chunk of ice in the rings of Saturn is approximately 333,170.7 years.
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The total amount of kinetic energy associated with the motion
of atoms or molecules in an object is referred to as
A
B
C
D
Heat
Light
Sound
Spin
1250
Answers
The total amount of kinetic energy associated with the motion of atoms or molecules in an object is referred to as Heat.
What is kinetic energy?Kinetic energy is the energy of motion. It is the energy possessed by a body due to its motion. The kinetic energy of an object is equal to one half of the product of its mass and the square of its velocity. In equation form, kinetic energy can be expressed as KE = 1/2 mv2, where m is the mass of the object and v is its velocity. Kinetic energy can be used to do work. For example, when a car accelerates, its kinetic energy is used to overcome the force of gravity and friction, allowing it to move forward. Kinetic energy can also be used in other situations such as the kinetic energy of a thrown baseball or the kinetic energy of a swinging pendulum. Kinetic energy is a form of energy that can be converted into other forms of energy, such as heat and sound, or used to do work.
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On which object will Earth's gravity act with the greatest magnitude? *
An apple
A cereal bowl
A watermelon
A TV remote
Answers
Answer: The watermelon
Explanation: The watermelon has a larger mass than the rest of the three.
A ball falling has both potential energy and kinetic energy. Where do you think it has the most potential energy and where do you think it has the more kinetic energy?
Answers
Answer:
it has most potential at highest point (not in space), But kinetic at lowest
Answer: When the ball is highest in the air it has the most potential energy and it has the most kinetic energy when it is about to hit the ground thats when it is moving fastest.
Can someone pls help me answer this I’ll give brainliest to whoever actually answers it
Answers
Answer:
Limestone classifacation: sedimentary rock
Sandstone: sedimentary rock
The force F between two parallel wires carrying electric currents is inversely proportional to the distance d between the wires. If a force of 0.750 N exists between wires that are 1.75 cm apart, what is the force between them if they are separated by 2.50 cm?
Answers
the force between the two wires if they are separated by 2.50 cm is 0.525 N.
Given that force F between two parallel wires carrying electric currents is inversely proportional to the distance d between the wires and that a force of 0.750 N exists between wires that are 1.75 cm apart and that we are supposed to find the force between them if they are separated by 2.50 cm.
Let the initial force be F₁ and the initial distance be d₁.
Therefore, we can write the relationship between force and distance as;
F₁d₁ = F₂d₂
Where
;F₁ = 0.750 N (initial force)
d₁ = 1.75 cm (initial distance)
F₂ = ? (force at new distance)
d₂ = 2.50 cm (new distance)
Let us find F₂;F₁d₁ = F₂d₂F₂ = F₁d₁/d₂
Now substitute the values we know;
F₂ = (0.750 N x 1.75 cm) / 2.50 cmF₂ = 0.525 N
Therefore, the force between the two wires if they are separated by 2.50 cm is 0.525 N.
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The unit of area is called derived unit, why?
Answers
Answer:
Because the unit of area depends upon the other fundamental units.
Explanation:
Unit of Area = m^2
actual metre is the unit of length.
so metre × metre makes ?^2
Why does refracting light bend when it enters a denser or less dense medium?
Answers
Answer: The light bends because light travels fast but it slows down in a denser medium. For example light refracts in water or it bends after passing through air. When light passes through air ( a less dense medium ) then through water ( a more dense medium ) the beam of light bends because light travels more slowly in a denser medium then it picks up its pace again once it passes. The density of the substance determines how much the light is refracted. I hope this makes sense and I hope this answered your question!! :)
The direction of a moving object will not change if the net force acting on it is
Answers
Answer:
The direction of a moving object will not change if the net force acting on it is zero.
Explanation:
If there is a net force acting on a body, the body may accelerate, slow down, or change direction. In other words, an unbalanced net force may change the state of motion of a body.
The only way a moving object will not change its direction if the body is moving with a constant velocity, meaning all the forces acting on the body are in equilibrium (or balanced). In other words, the net force acting on it is zero, and the speed, as well as direction, would not change.
Therefore, we conclude that the direction of a moving object will not change if the net force acting on it is zero.
1. A swimmer has a mass of 80 kg and is swimming at a speed of 6
m/s.
a. What type of energy does she have?
b. How much energy does she have?
Answers
Explanation:
1. swimmer is having kinetic energy as it is moving with velocity of 6 meter per second..
2. Intial velocity = 6 , Final velocity = 0
Average velocity = u +v /2
6+0/2 = 6/2 = 3
So, 3 is velocity
Kinetic energy = ½ mv²
= ½× 80 × (3)²
= 40×9
= 360 Joule Answer
What separates the two sections of the solar system?.
Answers
Answer:
These two groups of planets are separated by the asteroid belt, a disk of small rocky bodies orbiting the sun between Mars and Jupiter.
Explanation:
Your welcome!
by moving the screen only, change the pattern so you can see only the wide interference pattern. is the pattern you see now the single slit pattern or the double slit pattern? how can you tell?
Answers
If you move the screen only, you will not see any interference pattern on the screen. The interference pattern is created by the diffraction of light through the two slits. When the screen is moved, the distance between the slits and the screen changes, and the interference pattern disappears.
To tell if you are seeing the single slit or the double slit pattern, you can look at the interference pattern on the screen. If you are seeing a pattern of bright and dark fringes on the screen, you are seeing the double slit pattern.
This pattern is characteristic of wave interference and is produced when the light passes through two closely spaced slits. On the other hand, if you do not see any interference pattern on the screen, you are seeing the single slit pattern. This pattern is characteristic of wave diffraction and is produced when the light passes through a single slit.
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A researcher may use a two-tailed test to evaluate a directional hypothesis.
Please select the best answer from the choices provided
OT
OF
Answers
Answer:
true
Explanation:
just took the test
Answer:
True
Explanation:
A car speedometer has a 3% uncertainty. What is the range of possible speeds (in km/h) when it reads 100 km/h
Answers
The range of possible speeds when a car speedometer reads 100 km/h with a 3% uncertainty is 97 km/h to 103 km/h.
When a car speedometer has a 3% uncertainty, it means that the displayed speed can deviate by 3% from the actual speed. In this case, if the speedometer reads 100 km/h, the actual speed could be either lower or higher. For calculating the range of possible speeds, need to find the 3% deviation from 100 km/h.
For determining the lower limit of the range, subtract 3% of 100 km/h from 100 km/h:
Lower limit = 100 km/h - (3/100) * 100 km/h = 100 km/h - 3 km/h = 97 km/h
For determining the upper limit of the range, add 3% of 100 km/h to 100 km/h:
Upper limit = 100 km/h + (3/100) * 100 km/h = 100 km/h + 3 km/h = 103 km/h
Therefore, the range of possible speeds when the speedometer reads 100 km/h with a 3% uncertainty is from 97 km/h to 103 km/h.
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What is Physics? How is Physics used in your everyday life? Give at least two examples and explain your answer. You need at least 3
Answers
Answers:
The transportation industry is no stranger to the manipulation of everyday physics. Cars and trains utilize the wheel, which provides a smooth, steady motion.
The ears hear sounds which occur through the movement of air molecules, and the chemistry that drives all of biology depends on the physics of energy and molecules. Every day, for example, plants absorb sunlight, water, and carbon dioxide, creating glucose and releasing oxygen as a byproduct.
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(hrwc10p24_6e) A bullet of mass 6.0 g is fired horizontally into a 2.7 kg wooden block at rest on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.32. The bullet comes to rest in the block, which moves 2.40 m. (a) What is the speed of the block immediately after the bullet comes to rest within it? Submit Answer Tries 0/8 (b) At what speed is the bullet fired? Submit Answer Tries 0/7
Answers
22)In this problem, a bullet is fired horizontally into a wooden block at rest on a horizontal surface. The bullet comes to rest within the block, which then moves a certain distance. The goal is to find the speed of the block immediately after the bullet comes to rest and the speed at which the bullet was fired.
To solve this problem, we can apply the principle of conservation of momentum. Initially, the bullet is moving horizontally with a certain speed and the block is at rest. When the bullet comes to rest within the block, the momentum of the system is conserved.
The momentum before the collision is equal to the momentum after the collision. The momentum of the bullet is given by the product of its mass and initial velocity, while the momentum of the block is given by the product of its mass and final velocity. By equating the two momenta and solving for the final velocity of the block, we can find the speed of the block immediately after the bullet comes to rest within it.
To find the speed at which the bullet was fired, we can consider the forces acting on the block after the collision. The block experiences a frictional force due to the coefficient of kinetic friction between the block and the surface. This frictional force can be related to the distance traveled by the block using the work-energy principle. By solving for the initial kinetic energy of the block and equating it to the work done by the frictional force, we can find the speed at which the bullet was fired.
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The process of seafloor spreading
Answers
Answer:
Seafloor spreading is a geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other. ... As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense
Explanation:
hope it helps stay safe
Answer:
Magma comes out of the rift valley.
Magma cools to rock and hardens.
Rock is pushed away as new rock is formed at MOR.
Oceanic crust and continental crust meet at the trench.
Oceanic crust bends down under the continental crust.
Gravity pulls rock towards mantle.
Rock melts to mantle.
Explanation:
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if the little fish had instead been moving toward the big fish rather than away from the big fish, what would the total initial momentum of the fish be?
Answers
So, pA=m1u1 is the initial momentum of the body A.
How do you calculate initial momentum?The system's total initial momentum is zero. Because no external forces act on the system in the horizontal direction, the system's final horizontal momentum component is also zero. The elastic spring force is cautious. The system's total energy E = K + U is conserved.
For these calculations, use the momentum equation:
The Momentum Calculator employs the formula p=mv, which states that momentum (p) equals mass (m) times velocity (v) (v)
The product of mass and velocity is defined as momentum.
p=mv.
The body A's initial momentum is given.
As a result, p A=m 1u 1.
If you have the other quantities, use the momentum equation p = m•v to calculate the momentum or velocity of an object.
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