nate throws a basketball straight downward, letting it bounce once before catching it. we can ignore air resistance.what is true about the acceleration and velocity of the ball on its way down (while in the air)?

Answer:

They subtract the atomic number from the atomic mass

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The heat changes that occur in the various change of state processes are as follows:

A change of state is the change of a substance from one physical state to another physical state, for example, from liquid to gas.

Matter undergoes physical changes as its condition changes. The chemical composition or physical characteristics of matter are unaffected by these reversible modifications. Melting, freezing, sublimation, deposition, condensation, and evaporation are a few of the processes that can change a substance's state.

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We can determine the magnetic field at two different distances from a system made up of two conductors using Ampere's law:

a) The system's magnetic field is:

b) The magnetic field for the system's exterior is b = 0.

Ampere's Rule.

According to Ampere's law, the magnetic field's dot product times a closed path is proportional to the current flowing through the path.

∫ B. ds = μ₀ I

Here, B is the magnetic field, S is the closed path, μ₀ is the vacuum permittivity, and I is the current where bold indicates vectors.

Ask about the magnetic fields within the two conductors (optional).

Fixing the associated circular path will cause I, the current that stops inside the path, to flow through the system.

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Answer:

Bbbbbbbbbbbbbb. bbbbbbbbbbbbbbb

The properties of water that makes it possible for life to continue to exist in lakes covered by a thick layer of ice for many months of the year are:

The correct option is C.

The water in frozen lakes supports life because of the following properties f water;

As soon as the water turns to ice, the ice loses a lot of its water-like density and continues to float on the lake's surface. Water loses density when it grows colder below 4° Celsius, forcing water that is about to freeze to float to the top.

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Most crashes occur at intersections because Drivers fail to search and identify a safe path of the travel when approaching an intersection. Drivers don't identify or understand the risks. Drivers fail tp develop good driving habits to effectively manage the risks.

Most crashes occur at intersections because of the following reason:

1) Drivers fail to search and identify a safe path of the travel when approaching an intersection.

2) Drivers don't identify or understand the risks.

3) Drivers fail tp develop good driving habits to effectively manage the risks.

Thus, Most crashes occur at intersections because all of the above reason. Most crashes occur at intersections because Drivers fail to search and identify a safe path of the travel when approaching an intersection. Drivers don't identify or understand the risks. Drivers fail tp develop good driving habits to effectively manage the risks.

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The phase of the moon when the moon is on the opposite side of the earth from the sun is the full moon. This happens when the sun, earth, and moon are aligned, with the earth in the middle.

The full moon appears when the sun’s light reflects off the entire surface of the moon, making it appear completely illuminated from our perspective on earth.Therefore, option A is the correct answer: The full moon.

When the moon is on the opposite side of the Earth from the sun, it is in the full moon phase. During this phase, the sun illuminates the entire side of the moon facing the Earth, making it appear fully lit and round. This occurs because the sun, Earth, and moon are aligned in a straight line, with the Earth in the middle. The full moon phase is characterized by a bright, round shape and is often considered the most visually striking lunar phase. It occurs approximately once every 29.5 days as the moon orbits around the Earth.

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Option b. is correct.

An electron is confined in a 1-dimensional box of length L. If the length of the box is decreased to L/2, the energy levels of the electron would...decrease.

Explanation: In a 1-Dimensional box, the energy of an electron is determined by the formula: E= h²n²/8mL²Where h is Planck's constant, m is the mass of the electron, L is the length of the box, and n is the quantum number. The energy levels of the electron would decrease when the length of the box is suddenly decreased to L/2.

This happens because the energy levels depend on the length of the box and when the length is decreased, the energy levels decrease too. The formula shows that energy levels are inversely proportional to the square of the length of the box. This means that when the length is decreased to half of its original value, the energy levels decrease to a quarter of their original value. Therefore, the energy levels of the electron decrease when the length of the box is suddenly decreased to L/2.

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Answer:

1200

Explanation:

Each solution tested has its advantages and disadvantages. The most effective solution depends on the situation and the amount of oil that needs to be removed from the water.

The three solutions tested to remove oil from water are scooping the oil with a spoon, absorbing the oil with a paper towel, and using soap to break up the oil. Each solution has its advantages and disadvantages. Scooping the oil with a spoon is an effective solution to remove a significant amount of oil quickly. However, it is not a practical solution for removing a large amount of oil. The disadvantage is that it spreads the oil around the surface of the water and leaves some oil in the water. Absorbing the oil with a paper towel can effectively remove a lot of oil. The advantage is that it removes some oil from the water, leaving it relatively clean. However, it also picks up a lot of water and can't get all of the oil. Using soap to break up the oil is a good solution that removes all of the oil from the water. The advantage is that it removes all of the oil from the water, leaving it clean. However, the disadvantage is that it disperses the oil on the surface of the water, making it harder to remove from the sides of the bowl. In conclusion, each solution tested has its advantages and disadvantages. The most effective solution depends on the situation and the amount of oil that needs to be removed from the water.

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Given function isv(t) = t³ +13t²+47t-35and time interval is 1≤t≤7. We have to calculate:

(a) Displacement

(b) Total Distance

(a) Displacement:

Displacement is defined as the shortest distance between initial and final points. We can find the displacement of a particle with the help of following formula:

Displacement = Final Position - Initial PositionHere, the particle moves along a straight line, and we don't know the initial and final position.  Thus, the displacement of the particle is 219 ft.(b) Total Distance:Total distance traveled by the particle is the sum of all the distances covered by it in different intervals.

Thus, we have two real roots of the given equation:t₁

≈ - 6.548t₂

≈ 0.215

Therefore, ∫|v(t)|dt = 309

As we have to find the total distance, we have to add both the cases. Therefore,

Total Distance =∫|v(t)|dt  [from 1 to 7]

=∫|v(t)|dt [from 1 to 7]

=∫|v(t)|dt (from 1 to 1.215) +|v(t)|dt (from 1.215 to 7) = 252 + 309= 561 ft Thus, the total distance traveled by the particle is 561 feet.

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Electric lines of force never cross because the electric field direction must be unique at each point in space, and the electric field is a vector quantity that cannot have two different directions at the same point in space.

Electric current is the flow of electric charge through a material. It is typically expressed in units of amperes (A), which represent the rate at which charge flows through a conductor.

here,
Electric lines of force represent the direction of the electric field at each point in space. They are used to visualize the direction and strength of the electric field around a charged object. One of the fundamental properties of electric lines of force is that they never cross.

The reason why electric lines of force do not cross is that they are defined as the direction of the electric field at each point in space. If two lines of force were to cross, this would imply that the electric field has two different directions at the same point in space, which is not possible. The direction of the electric field must be unique at each point in space, as it is determined by the charge distribution and geometry of the system.

Therefore, electric lines of force never cross because the electric field direction must be unique at each point in space, and the electric field is a vector quantity that cannot have two different directions at the same point in space.

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Answer:

B

Explanation:

The method used by the student to test his claim is  determine how dissolving salt in water affects the specific heat. The correct option is fourth.

The specific heat is the amount of heat required to change the temperature by 1°C. It is denoted by C.

A student claims that water's polarity is the reason it has a high specific heat.

Polarity is determined by the salt dissolved in water. So, to determine how dissolving salt in water affects the specific heat is best method.

Thus, the fourth option is correct.

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Answer:

• Momentum always depends on the mass and speed/velocity of the body in motion.

Explanation:

\({ \tt{momentum = mass \times velocity}} \\ \)

13.0 m/s   that's how fast he was going

It requires 288 joules of heat to raise the temperature of a 225-g lead ball from 15.0°C to 25.0°C.

The formula to calculate the amount of heat, Q required to raise the temperature of an object is:

Q = mcΔT

Where:

Q = the amount of heat (in joules, J)

m = the mass of the object (in kilograms, kg)

c = the specific heat capacity

ΔT = the change in temperature

In this problem, we are given:

m = 225 g = 0.225 kg

ΔT = (25.0°C - 15.0°C) = 10.0°C

c = 128 J/kg*K

plugging in the values

Q = mcΔT

Q = (0.225 kg)(128 J/kg*K)(10.0°C)

Q = 288 J

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Answer:

The statement that "electromagnetic waves require a medium to travel through" is incorrect. Electromagnetic waves do not require a medium to travel through and can propagate through a vacuum. This was one of the key insights of James Clerk Maxwell's theory of electromagnetism.

Answer:

c

Explanation:

Answer:

The weak force governs the decay of a neutron into a proton (a process known as beta decay). The strong force binds quarks together into protons and neutrons (the residual strong force holds protons and neutrons together in the nucleus). Gravity governs the motion of an apple falling from a tree.

Explanation:

Answer:

Weak Nuclear force

Answer:

b. 220 V

Explanation:

Let resistors be R1, R2, and R3 respectively.

Given the following data;

R1 = 20 ohms

R2 = 30 ohms

R3 = 60 ohms

Current = 2 Amperes

To find the voltage;

First of all, we would determine the total effective resistance (RT).

For series circuit;

RT = R1 + R2 + R3

RT = 20 + 30 + 60

RT = 110 Ohms

Next, we find the voltage using the formula;

Voltage = current * resistance

Voltage = 2 * 110

Voltage = 220 Volts

Answer:

Below

Explanation:

rate * time = distance       <====you should know this .....re-arrange as

time = distance / rate        sub in the values given

 time = 2 m / 100 m/s

  time =  .02 s

Answer:

Explanation:

According to newton's third law of motion, Action and reaction are equal and opposite, hence for an object that weighs 150N suspended by a wire, the tension on the wire is 150N

Ultimately the tension on a string or an object is equal to the mass times   gravity(which is same as the weight of the object)

Answer:

its 150

Explanation:

The initial speed of the ball, considering its upward direction, is approximately -10.03 m/s., considering the height of the balcony and the time it takes for the ball to reach it.

Let's assume the initial speed of the ball is denoted by "v." Since the ball is thrown vertically upward and caught by a person on a balcony, its final displacement will be 14 m (the height of the balcony) above the ground. The time taken for the ball to reach the balcony is given as 3.0 s.

Using the equation of motion for vertical motion:

\(h = ut + (1/2)gt^2\)

Substituting the known values:

\(14 = v(3.0) + (1/2)(9.8)(3.0)^2\)

Simplifying the equation:

14 = 3v + 44.1

Rearranging the equation:

3v = 14 - 44.1

3v = -30.1

Dividing both sides by 3:

v = -30.1/3

Therefore, the initial speed of the ball, considering its upward direction, is approximately -10.03 m/s. The negative sign indicates that the ball was thrown upward against gravity.

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Answer:

Explanation:

To determine the person's position relative to the starting point, we can break down their movements into horizontal (east/west) and vertical (north/south) components.

The person walks 80 m east. This means they move 80 m to the right horizontally.

Then, the person turns right through an angle of 143 degrees. Since this angle is not specified with respect to a specific reference point, we'll assume it is a clockwise turn. This turn will change their direction but will not affect their horizontal position.

After the turn, the person walks a further 50 m. This means they move 50 m in the new direction determined by the angle of 143 degrees.

Since the angle and length of the final movement are provided, we can calculate the horizontal and vertical components of the person's position using trigonometry.

Horizontal component = 80 m + 50 m * cos(143 degrees)

Vertical component = 50 m * sin(143 degrees)

Calculating these values:

Horizontal component = 80 m + 50 m * cos(143 degrees) ≈ -66.97 m (rounded to two decimal places)

Vertical component = 50 m * sin(143 degrees) ≈ 35.03 m (rounded to two decimal places)

Therefore, the person's position relative to the starting point is approximately (-66.97 m, 35.03 m)

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The Witness Experimenter configure options include a Skip field that misses out on a different number of random numbers for each replication (Option D).

Experimenter configure options are some basic settings of a Witness experiment. These settings influence how the experiment would behave and what output is produced. With the help of configure options, you can set the value of random number streams and skip replication.

The skip value misses out on a different number of random numbers for each replication. As a result, this provides some level of control over the replication. By changing the value of the skip, you can control which random numbers should be missed and which should not be missed. In addition, by using the skip field, you can increase the simulation run speed. As a result, you get better output in less time.

Thus, the correct option is D.

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Answer:

The main force in play here is weight W, or m*g (where m is Mass and g is Gravity) that make up the main force acting downwards. This could also be referred to as the normal force.

Explanation:

From what we can see the plastic strip is at a certain angle. To which other forces, such as: friction, pull and the ones mentioned above come into play in this question.

Answer:

Approximately \(705\; {\rm m}\).

Explanation:

Let \(x\) denote the distance travelled before the plane takes off.

Let \(u\) denote the initial velocity of the plane, and let \(v\) denote the velocity of the plane when it takes off. It is given that the takeoff speed is \(v = 65\; {\rm m\cdot s^{-1}}\). Assuming that the plane was initially stationary, initial velocity would be \(u = 0\; {\rm m\cdot s^{-1}}\).

It is given that the acceleration of the plane would be \(a = 3\; {\rm m\cdot s^{-2}}\).

Since acceleration is constant, apply the SUVAT equation \(x = (v^{2} - u^{2}) / (2\, a)\) to find the value of \(x\):

\(\begin{aligned} x &= \frac{v^{2} - u^{2}}{2\, a} \\ &= \frac{(65)^{2} - (0)^{2}}{2\, (3)}\; {\rm m} \\ &\approx 705\; {\rm m}\end{aligned}\).

(Rounded up.)

Hence, the length of the runway should be at least \(705\; {\rm m}\).

The constant angular acceleration of the wheel is: 33.80 rad/s²`.

To determine the constant angular acceleration of a wheel, you can use the formula for angular acceleration which is given as: (final angular velocity - initial angular velocity) divided by time.
α= (ωf-ωi)/t    

The initial angular velocity is zero since the wheel starts from rest, so it can be assumed as zero.
Then, you can substitute the given final angular velocity and the time taken to reach that velocity in the formula to calculate the angular acceleration of the wheel.
Once the values are substituted, simplification can be done to obtain the numerical value of the angular acceleration in radians per second squared.
In the given example, the final angular velocity is 98.9 rad/s and the time taken to reach that velocity is 2.93 seconds. Substituting these values in the formula:
α= (98.9 rad/s - 0)/2.93s`Simplifying gives`α= 33.80 rad/s²`

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Answer:

The difference between ohmic and non-ohmic conductor is that an Ohmic conductors have linear relationship between voltage and current, whereas the non-Ohmic conductors do not have linear relationship between voltage and current. The conductor is whether ohmic or non ohmic can be verified with Ohm's law.

Explanation: