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3 years ago

7

a steam engine works on its vicinity and 285k heat is released with the help of 225C energy absorbed to the system. what is the

efficiency of steam engine?explain the use of rest of energy

1 answer:

Sedaia [141]3 years ago

7 0

Explanation:

define the term specific heat capacity of water

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the nuciel of all atoms are made of which subatomic particles A. electrons and protons B. protons and neutrons c. protons neutro

marshall27 [118]

B Protons and neutrons. Electrons are outside the nucleus.

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3 years ago

When a police officer catches you speeding by using a radar gun, the waves sent out by the gun must be _______ off your car.

Neporo4naja [7]

I would say its Absorbed

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3 years ago

How would you find the speed of a person who walked

Alex Ar [27]

Answer:

v = 1.25 m/s

Explanation:

We have,

Distance covered by a person is 10 meters

Time taken by him to cover that distance is 8 seconds.

If we want to find the speed of a person, we must know distance covered by it and taken. In this case, we know both distance and time. His speed is given by :

$v=\dfrac{d}{t}\\\\v=\dfrac{10\ m}{8\ s}\\\\v=1.25\ m/s$

So, the speed of the person is 1.25 m/s.

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3 years ago

Are stars classified using nebula

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4 years ago

A horse of mass 242 kg pulls a cart of mass 224 kg. The acceleration of gravity is 9.8 m/s 2 . What is the largest acceleration

Rufina [12.5K]

To solve this problem it is necessary to apply the concepts related to Newton's second Law and the force of friction. According to Newton, the Force is defined as

F = ma

Where,

m= Mass

a = Acceleration

At the same time the frictional force can be defined as,

$F_f = \mu N$

Where,

$\mu =$ Frictional coefficient

N = Normal force (mass*gravity)

Our values are given as,

$m_h = 242 kg\\m_c = 224 kg\\\mu = 0.894\\$

By condition of Balance the friction force must be equal to the total net force, that is to say

$F_{net} = F_f$

$m_{total}a = \mu m_hg$

$(m_h+m_c)a = \mu*m_h*g$

Re-arrange to find acceleration,

$a= \frac{\mu*m_h*g}{(m_h+m_c)}$

$a = \frac{0.894*242*9.8}{(242+224)}$

$a = 4.54 m/s^2$

Therefore the acceleration the horse can give is $4.54m/s^2$

3 0

3 years ago