Electromagnetic radiation consists of particles called:
1 answer:
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The specific heat capacity of concrete is
Explanation:
When a certain amount of energy Q is supplied/given off to/from a sample of substance with mass m, the temperature of the substance increases/decreases by an amount , according to the equation
where
m is the mass of the substance
is the specific heat capacity of the substance
is the change in temperature of the substance
In this problem, we have:
m = 1 kg = 1000 g is the mass of the concrete slab
is the amount of energy lost by the slab
is the change in temperature of the slab
Solving the equation for , we find the specific heat capacity of concrete:
Learn more about specific heat capacity:
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Answer:
The horse is going at 12.72 m/s speed.
Explanation:
The initial speed of the horse (u) = 3 m/s
The acceleration of the horse (a)= 5 m/
The displacement( it is assumed it is moving in a straight line)(s)= 15.3 m
Applying the second equation of motion to find out the time,
Solving this quadratic equation, we get time(t)=1.945 s, the other negative time is neglected.
Now applying first equation of motion, to find out the final velocity,
v=12.72 m/s
The horse travels at a speed of 12.72 m/s after covering the given distance.