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almond37 [142]
3 years ago
8

1

Physics
1 answer:
jekas [21]3 years ago
5 0

Answer:

it's rock

Explanation:

hope it's help you

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In a coal-burning power plant, a condenser is used to cool down the steam and convert it back to liquid water true or false
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A human heart beats once in 0.8 seconds. How many times it will beat in the life of 70 years.
Y_Kistochka [10]

Answer:

Explanation:

108,000 beats per hour

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What is the kinetic energy of a toy truck with a mass of 0.75 kg and a velocity of 4 m/s? (Formula: )
Dvinal [7]

Answer: Option (b) is the correct answer.

Explanation:

Kinetic energy is the energy of an object or particle when it is in motion.

Mathematically,   Kinetic energy = \frac{1}{2}mass \times (velocity)^{2}

It is given that toy truck has mass = 0.75 kg, and velocity = 4 m/s.

Calculate the kinetic energy as follows.

           Kinetic energy = \frac{1}{2}mass \times (velocity)^{2}

                                    = \frac{1}{2}0.75 kg \times (4 m/s)^{2}

                                     = \frac{1}{2}0.75 kg \times 16 m^{2}/s^{2}

                                     = 0.75 kg \times 8 m^{2}/s^{2}

                                     =  6 kg m^{2}/s^{2}

or,       Kinetic energy = 6 joules

Thus, we can conclude that kinetic energy of toy truck is 6 J.


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