3 years ago

The rate at which an object changes position is that object's ______.

Physics

1 answer:

Alexxandr [17]3 years ago

5 0

The correct answer is: Velocity

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A man lifts a 25.9 kg bucket from a well and does 5.92 kJ of work.The acceleration of gravity is 9.8 m/s^2 . How deep is the wel

Jet001 [13]

Answer:

The well is 23.3 m

Explanation:

As the bucket is lifted out of the well, energy in the man is being transferred to the bucket as gravitational potential energy.

Work done against gravity = mass * height * acceleration due to to gravity

W = mgh

5 920 J = 25.9 kg * h * 9.8 m/s²

h = 23.3 m

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2 years ago

Electric eels generate electric pulses along their skin that can stun an enemy. In a test, an electric eel generated pulse of 50

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Answer:

The power of the pulse is 40 Watts

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2 years ago

Rainwater draining from a neighborhood street initially travels at 4 ft/s through a pipe with a cross-sectional area of 15.7 ft2

Fudgin [204]

Answer:

The velocity is $v_2 = 0.96 \ ft/s$

Explanation:

From the question we are told that

The initial speed is $v_1 = 4 \ ft/s$

The cross -sectional area of the first pipe is $A_1 = 15.7 \ ft$

The cross -sectional area of the second pipe is $A_2 = 65.4 \ ft$

Generally from continuity equation we have that

$A_1 * v_1 = A_2 * v_2$

$v_2 = \frac{A_1 * v_1 }{A_2 }$

=> $v_2 = \frac{15.7 * 4 }{65.4 }$

=> $v_2 = 0.96 \ ft/s$

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3 years ago

What is the voltage in an electric current?

k0ka [10]

It is the energy of the electrons I believe

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2 years ago

You can make a smoothie in a blender with a power of 400 watts and an efficiency of 85 percent. How much energy is actually bein

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Answer:

total energy is 14.12kj

energy at 85% is 12kJ

Explanation:

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3 years ago