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4 years ago

PLEASE HURRY I'M BEING TIMED

1 answer:

4 0

When the ball is first thrown, its kinetic energy is highest and its potential energy is lowest. As the ball rises, its kinetic energy decreases and its potential energy increases because it's slowing down as it goes higher. As the ball goes as high as it can, it stops momentarily; that is when the ball's potential energy is full, and it's kinetic energy is low. Then when the ball begins to fall back down, its potential energy is getting lower, and its kinetic energy is growing. Right before the ball hit the ground, the kinetic energy was at its highest, and its potential was lowest. Then when it hit the ground, there was no kinetic or potential energy.

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Which of the following processes could have caused this cave to fill with water?

Mars2501 [29]

Your answer would be D. Transpiration

5 0

3 years ago

To see if your results are reasonable, you can compare the final velocity of the stone as it falls down unwinding the wire from

pentagon [3]

Answer:

The velocity of the stone is 2.57 m/s.

Explanation:

Given that

Height = 0.337 m

We need to calculate the velocity of the stone

Using equation of motion

$v^2-u^2=2gh$

Where, v = velocity of stone

u = initial velocity

g = acceleration due to gravity

h = height

Put the value into the formula

$v^2-0=2\times9.8\times 0.337$

$v=\sqrt{2\times9.8\times0.337}$

$v=2.57\ m/s$

Hence, The velocity of the stone is 2.57 m/s.

7 0

4 years ago

A car accelerates at a rate of 3 m/s^2. If its original speed is 8 m/s, how many seconds will it take the car to reach a final s

kkurt [141]

Answer:

$\Large \boxed{\mathrm{5.67 \ seconds }}$

Explanation:

$\displaystyle \mathrm{acceleration \ = \ \frac{final \ velocity - initial \ velocity }{elapsed \ time}}$

$\displaystyle A \ = \ \frac{V_f - V_i }{t}$

$\displaystyle 3 \ = \ \frac{25 - 8 }{t}$

$\displaystyle 3 \ = \ \frac{17 }{t}$

$\displaystyle t \ = \ \frac{17 }{3} \approx 5.67$

4 0

3 years ago

The primary 40-turn coil of an ideal transformer is supplied with 120 V (rms). If the rms voltage output of the secondary coil i

Svet_ta [14]

Answer:

No. of turns in secondary coil are 5.

Transformer Type: STEP DOWN TRANSFORMER

Explanation:

The relationship of the no. of turns in transformer secondary and primary coils with their voltages is known as the turn ration. The formula for turns ratio is as follows:

Np/Ns = Vp/Vs

where,

Np = No. of turns in primary coil = 40

Ns = No. of turns in secondary coil = ?

Vp = Voltage supplied to primary coil = 120 V

Vs = Voltage output of secondary coil = 15 V

Therefore,

40/Ns = 120 V/15 V

Ns = 40/8

TYPE OF TRANSFORMER:

Since, this transformer decreases the voltage value at the output. Hence it is a <u>STEP DOWN TRANSFORMER.</u>

7 0

4 years ago

Which branch of science deals with the study of the structures shown here?

Arturiano [62]

Vertebrate Zoology, I’m pretty sure

3 0

3 years ago

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