question: you arrive in my class 45 seconds after leaving math which is 90 meters. how fast did you travel?

pls help i’ll mark as brainliest

Explanation:

The resources that we value—time, money, labor, tools, land, and raw materials—exist in limited supply. There are simply never enough resources to meet all our needs and desires.

Explanation:

Time, money, labor, land , and raw materials

Answer:

Its 13n

Explanation:

for 1n its 0.2 times that by 13 and you get 2.6

Answer:

the answer is 8n

Explanation:

hope this helps

The lost in kinetic energy after the collision is 55.45 J.

The kinetic energy lost after collision is calculated as follows;

Their final velocity after the collision is calculated as;

(80 + 30) v = 100 kgm/s

110v = 100

v = 100/110

v = 0.91 m/s

The sum of their initial velocity before and after collision;

K.Ei = 0.5 x (30)(2²) + 0.5 x (80)(1²)

K.Ei = 100 J

K.Ef = 0.5(30 + 80)(0.9²)

K.Ef = 44.55 J

ΔE = 100 J - 44.55 J

ΔE = 55.45 J

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The amount of substance affects the total energy through the concept of molar heat capacity. Molar heat capacity is defined as the amount of heat required to raise the temperature of one mole of a substance by one degree Celsius. Therefore, the more substance there is, the more heat energy is required to raise its temperature.

For example, if we have one mole of a substance, it will require a certain amount of energy to raise its temperature by one degree Celsius. However, if we have two moles of the same substance, it will require twice as much energy to raise the temperature of the larger amount by the same one degree Celsius.

Additionally, the amount of substance can affect the total energy through the concept of specific heat capacity. Specific heat capacity is defined as the amount of heat required to raise the temperature of one unit of mass (usually one gram) of a substance by one degree Celsius. Therefore, if we have more mass of a substance, it will require more energy to raise the temperature of the larger amount by the same one degree Celsius.

In summary, the amount of substance affects the total energy through the concepts of molar heat capacity and specific heat capacity, which determine how much energy is required to raise the temperature of a given amount of substance.

Answer:

The electron is a negatively charged particle found in the atoms of all the elements. The electrons are located outside the nucleus in an atom. An electron is usually represented by the symbol (e –). The mass of an electron is about the mass of a hydrogen atom.

Explanation:

A) The electric field at 1.0 cm above the center of the sheet is 2.5 × 10⁵ N/C, B) the electric field 15 m above the center of the sheet is 11 N/C.

Side of the square sheet, l =25 cm = 0.25 m

Uniformly distributed charge, Q = 275 × 10⁻⁹ C

ε₀ = 8.8 × 10⁻¹²

a) When close to the sheet, we assume it as an infinite sheet, So,

E = σ/2ε₀,

σ = Q/l²

E = Q/(2ε₀l²)

E = (275 × 10⁻⁹)/(2×8.8 × 10⁻¹²×0.25²)

E = 2.5 × 10⁵ N/C

B) When far from the sheet, we assume it as a point charge, if R = 15 m

E = Q/(4πε₀R²)

E = (275 × 10⁻⁹)/(4π×8.8 × 10⁻¹²× 15²)

E = 11 N/C

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Answer:

B.rate of convection

Explanation:

Answer:

a) given that mass=0.6kg,distance of stretching from equilibrium position x=0.9m from new ton's second law,F=ma where a is acceleration of the body.Therefore,force on the spring -mass syste

Explanation:

hope it helps

Answer:

If the sun's mass were to double without pushing or pulling on the Earth, then the Earth's orbit will change to an ellipse which brings it out to our current radius but spends most of its time closer to the sun. The tides would probably get even stronger then, particularly when our orbit takes us closer to the sun.

Explanation:

The speed of the rock when it hits the ground vd is greater than the speed of the rock when it is thrown upward vu(vd>vu).

The rock will eventually reach its maximum height above the ground if thrown upward. It will fall back to the ground at the same vertical height at which it was thrown at a speed of 15 m/s. The rock's speed will increase above its initial speed of 15m/s as it continues to fall 100m below its initial vertical position.

Velocity is the rate of change in the position of an object in motion as measured by a specific time standard (e.g., 60 km/h northbound). Velocity is a key concept in kinematics, the branch of classical mechanics that studies body motion.

Velocity is a physical vector quantity that must be defined by both magnitude and direction. Speed is a coherently derived unit whose quantity is measured in the SI (metric system) as meters per second (m/s or ms1). For example, "5 m/s" is a scalar, whereas "5 m/s east" is a vector.

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In component form, the displacement vectors become

• 350 m [S]   ==>   (0, -350) m

• 400 m [E 20° N]   ==>   (400 cos(20°), 400 sin(20°)) m

(which I interpret to mean 20° north of east]

• 550 m [N 10° W]   ==>   (550 cos(100°), 550 sin(100°)) m

Then the student's total displacement is the sum of these:

(0 + 400 cos(20°) + 550 cos(100°), -350 + 400 sin(20°) + 550 sin(100°)) m

≈ (280.371, 328.452) m

which leaves the student a distance of about 431.8 m from their starting point in a direction of around arctan(328.452/280.371) ≈ 50° from the horizontal, i.e. approximately 431.8 m [E 50° N].

because mechanical advantage decreases due to the friction and weight of moving parts of the machine whereas the velocity ratio remains constant

hope it helps you

Explanation:

when a positive charged object is placed near a conductor electrons are attracted the object when electric voltage is applied an electric field within the metal triggers the movement of the elections making them shift from one end to another end of the conductor electrons will move toward the positive side

The average speed is  26.7 Km/s

Average speed is the total distance traveled by an object divided by the time taken to travel that distance. It is a measure of how fast an object travels over a given distance, on average.

The formula for average speed is:

Average speed = total distance traveled / time taken

We know that;

Speed = Distance/Time

We have to note that;

Distance =  7. 00 x 10^8 km

Time = 303 * 24 * 60 * 60

= 7. 00 x 10^8 km/303 * 24 * 60 * 60

= 26.7 Km/s

The speed that we find is 26.7 Km/s

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Answer:

the correct answer is no.a because kinetic energy is the energy which is possesses by virtue of being in motion.

C) In short time exposures, their images looked stellar.

The term "quasi-stellar" in quasars refers to the appearance of these objects in short time exposures. When observed with limited exposure time, quasars appear star-like or stellar in nature. This is because their intense luminosity is concentrated in a very small region, giving them a point-like appearance similar to stars. However, upon closer examination and with longer exposures, the unique characteristics of quasars become evident. Quasars are actually highly energetic and distant celestial objects that emit enormous amounts of radiation across a wide range of wavelengths. They are powered by supermassive black holes at the centers of galaxies, which accrete matter and release vast amounts of energy. Their spectra show distinct emission lines and other characteristics that distinguish them from ordinary stars.
So, while quasars initially appear stellar in short exposures, their true nature and extraordinary properties become apparent through detailed observations and analysis.

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Answer:

Julie's car.

Explanation:

The acceleration of an object is equal to the rate of change of velocity. It can be given by :

\(a=\dfrac{v-u}{t}\)

Jodi's car moves at a constant 60 mph for 10 s.

Julie's car transitions from a speed of 20 mph to a speed of 30 mph for the same time interval i.e. 10 s.

For Jodi's car, the change in velocity is equal to 0. As a result, its acceleration is equal to 0 m/s².

For Julie's car,

Initial speed, u = 20 mph = 8.9408 m/s

Final speed, v = 30 mph = 13.4112 m/s

Acceleration,

\(a=\dfrac{13.4112-8.9408}{10}\\\\a=0.447\ m/s^2\)

It is clear that Julie's car has the greater acceleration than the Jodi's car.

I suggest that the students move forward with option A.

Test funnels of the same size and material with varying sized openings. This will allow them to determine the optimal size for the opening that will help direct the marble to the launch pad. Once they have determined the optimal size, they can move forward with constructing the funnel with that size opening.

Answer:

A workout injury can happen to anyone, no matter your experience or fitness level. People hurt themselves in all kinds of ways when they work out. Even walking can cause an injury. But you can significantly cut your risk of getting hurt by following certain workout precautions. There are simple steps that can help keep you injury-free during your workout.

Every workout should begin with a warm-up and end with a cool-down period. A warm-up helps your body get ready for exercise. It gradually increases your heart rate and loosens your muscles and joints. Cool-down after you work out so, it brings your heart rate back to normal. Walking for 5 to 10 minutes after you work out is one way to cool down. Do dynamic stretching before and after you work out. This will help increase flexibility. Don't push yourself too hard. As your fitness abilities increase and you will be able to challenge yourself more.

Hope this helps

Maintaining physical fitness is very important in today's world. Each and everyone should be involved in physical fitness.nowaday people are so busy with their work that they have forgotten health is wealth.

Even if we get engaged in physical fitness activity we can some time get insuries . some of tips that can help prevent from getting physical fitness injury, warm up exercises should be done before exercise to avoid muscle strength.safety precautions should be taken if you are dealing with heavy objects .

hence we should maintain physical fitness with getting rid of injury that may occur

mark me

Answer:

Funny answer but works!

Explanation:

Not enough air. Go outside, crack open the window and blow air into the room like you would a balloon then close the window quickly. If it doesn't start bouncing, try giving the house a push. Good luck.

Securely fasten and evenly distribute the load, comply with regulations, and regularly monitor its security to transport a load safely on a flatbed trailer.

Several important procedures must be followed in order to transfer a load on a flatbed trailer safely. To prevent the load from shifting or falling during transit, attach it firmly first.

To ensure balance and stability, distribute the weight throughout the entire surface of the caravan. Use the proper tools, such as straps, chains, or padding, to secure and safeguard the load. Respect local laws about weight restrictions and load securing.

Make sure the load, the trailer, and the securing devices are all in good working order before you leave. While in travel, check on the load from time to time to ensure that it is still secure and make modifications as necessary. These recommendations can help you move a load on a flatbed trailer safely and carefully, lowering the possibility of mishaps or damage.

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Static friction is the force that opposes the motion between two surfaces in contact when there is no relative motion between them. The coefficient of static friction between the car's tires and the road is approximately 0.1837.

To determine the coefficient of static friction between the car's tires and the road, we can utilize the following formula that relates the maximum static friction to the centripetal force required for the circular motion:

f_s = m * a_c

Where:

f_s is the maximum static friction force,

m is the mass of the car, and

a_c is the centripetal acceleration.

To find the centripetal acceleration,

a_c = v² / r

Where:

v is the velocity of the car, and

r is the radius of the curve.

m = 2000 kg (mass of the car)

v = 30 m/s (velocity of the car)

r = 500 m (radius of the curve)

The centripetal acceleration:

a_c = (30 m/s)² / 500 m = 1.8 m/s²

Now, substituting the values into the formula for maximum static friction:

f_s = (2000 kg) * (1.8 m/s²) = 3600 N

The maximum static friction force (f_s) is equal to the normal force (N) multiplied by the coefficient of static friction (μ_s). In this case, the normal force is equal to the weight of the car (mg):

f_s = μ_s * N = μ_s * mg

Since the car is on a horizontal surface, the normal force (N) is equal to the weight of the car:

N = mg

Substituting the maximum static friction force:

3600 N = μ_s * (2000 kg) * g

Simplifying:

μ_s = 3600 N / (2000 kg * g)

The value of acceleration due to gravity (g) is approximately 9.8 m/s^2. Calculating the coefficient of static friction:

μ_s = 3600 N / (2000 kg * 9.8 m/s²) ≈ 0.1837

Therefore, the coefficient of static friction between the car's tires and the road is approximately 0.1837.

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Answer:

what is the direction of the sum of these two vectors?

Answer:

69.6

Explanation:

Ax= 0

Ay= 63.5

Bx= 101 cos 57= 55.009

By= 101 sin 57= 84.706

Tan-1 = (84.706/55.009)

         = 69.6

Answer:

A car engine has more power than a horse because a car engine does the same amount of work in time. Yasmin and Raj each had 10 boxes of equal weight to stack next to each other on the same shelf, at the same height and in the same arrangement. Yasmin completed the task in 2 minutes, while Raj took 3 minutes to stack his boxes. Raj applied less power than Yasmin because his stacking took more time to do the same amount of work.

Explanation:

A car engine has more power than a horse because a car engine does the same amount of work in less time. Raj applied less power than Yasmin because his stacking took more time to do the same amount of work.

The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.

Energy divided by time represents the dimension of power. The watt (W), which equates to one joule per second, is the unit of power in the International System of Units (SI).

Another popular unit of measurement is horsepower (hp), which is equivalent to a horse's power; one mechanical horsepower is equal to around 745.7 watts.

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Explanation:

this is the ans hope it works

Answer:

Forces make things speed up (or accelerate). When a force pushes or pulls the object, the object will move in the direction of the force. The bigger the force, and the lighter the object, the greater the acceleration.

Explanation:

The action from a force can cause an object to move or speed up (accelerate), to slow down (decelerate), to stop, or to change direction. Since any change in velocity is considered acceleration, it can be said that a force on an object results in the acceleration of an object.

A simple mathematical relationship exists between the mass of an object (m), the net force on the object (f) and its acceleration (a). The acceleration of an object is directly proportional to the net force and indirectly proportional to the object’s mass (a = f/m).

The magnitude of the necessary lifting force of the jet flying on the banks will be 9.42 × 10⁵ Newtons.

The lifting force can be simply defined as the force which is used to lift an object. Lifting force is the sum of all the forces on an object that force it to move perpendicular to the direction of flow of bank.

Necessary lifting face (F) = ms²

F = 2.06 × 10⁵ × (132)²/ 3810

F = 2.06 × 10⁵ × (132)²/ 3810

F = 2.06 × 10⁵ × 132 × 132 / 3810

F = 35893.44 × 10⁵/ 3810

F = 9.42 × 10⁵ N

Therefore, the necessary lifting force will be 9.42 × 10⁵ Newtons.

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Let's assume the speed of the canoe in still water as x and the speed of the current as y.

When canoeing downstream (with the current), the effective speed of the canoe would be (x+y). Similarly, when canoeing upstream (against the current), the effective speed would be (x-y).

From the given information, we know that:

Downstream speed: 24 miles in 4 hours, or (x+y) = 24/4 = 6 mph

Upstream speed: 34 miles in 6 hours, or (x-y) = 34/6 = 5.67 mph

Now, we can solve for x and y using a system of equations:

x + y = 6

x - y = 5.67

Adding the two equations, we get:

2x = 11.67

x = 5.835 mph

Substituting x into either equation, we can solve for y:

5.835 + y = 6

y = 0.165 mph

Therefore, the average velocity in still water is 5.835 mph and the average velocity of the current is 0.165 mph

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Answer:

3. Work

Explanation:

Number 1 isn't correct because you are not using efficiency to hold books and walk across the room.

Number 2 could be correct but isn't in this situation because you use power only to hold the books but not to walk across the room.

Number 4 is not correct because you need to do work to do something.