3 years ago

A car of mass 1500 kg starting from rest can reach a speed of 20

Physics

1 answer:

Sindrei [870]3 years ago

3 0

Explanation:

F=MA

F=1500 * 2

F=3000N

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The steam represents evaporation.

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The energy content of food is conventionally measured in Calories rather than joules. One Calorie in nutrition is equal to 4184

Rama09 [41]

Answer:

Part a)

$P = 186 W$

Part B)

$N = 676 times$

Explanation:

Part a)

Average power is rate of energy consumption

So it is given as

$P = \frac{mgh}{t}$

$P = \frac{100(75.7)(9.81)(0.150)}{59.9}$

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Part b)

If the efficiency is given as

$\eta = 20$ %

so we know that 20% of total energy consumed is converted into output work

So total power consumed here will be given as

$P = \frac{186}{0.20}$

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$E = power \times time$

$E = 930 \times 59.9$

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$1 g = 9 \times 4184 J$

$1 g = 37656 J$

so to consume 1000 g of fat we need to release total energy

$E = 37656 \times 10^3 J$

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$N = \frac{37656 \times 10^3}{55707}$

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4 years ago

How is a well different from a spring?

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Answer:

well people find a hole on the ground and they can see water and that theu build the well around them but the answer is. C

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3. You drop an egg out of your 10 m 2nd story window. If it took 1.43 sec, calculate the

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Answer:

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3 years ago

Compare the kinetic energy of a 20,000-kg truck moving at 110 km/h with that of an 80.0-kg astronaut in orbit moving at 27,500 k

laiz [17]

Kinetic energy is the energy that is possessed by an object that is moving. It is calculated by one-half the product of the mass and the square of the velocity of the object. We calculate as follows:<span>

For the truck,
KE = mv^2 / 2
KE = 20000 kg (110 km/h (1 h/3600 s)(1000 m / 1 km))^2 / 2
KE = 611111.11 J

For the astronaut,
KE = 80.0 kg (27500 km/h</span>(1 h/3600 s)(1000 m / 1 km)<span>)^2/2
KE = 611111.11 J

The kinetic energy possessed by the two bodies are the same.

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3 years ago