ΚΕ: m.22 2 What is the kinetic energy of 10kg dog running with a velocity of 12m/s?
1 answer:
Answer:
The answer is
<h2>720 Joules</h2>Explanation:
The kinetic energy of a body can be found by using the formula
<h3>where
m is the mass
v is the velocity / speed
From the question
mass = 10 kg
velocity = 12 m/s
Substitute the values into the above formula and solve
That's
<h3>We have the final answer as
<h3>720 Joules</h3>Hope this helps you
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7.91 g/ml is the density of the iron piece of 28.5 gms.
Explanation:
The density of a substance is defined as the volume it occupies. It tells the matter present in a substance.
The density is mass per unit volume and is denoted by p.
The formula for density is given by:
density (p) =
Data given is :
mass= 28.5 grams
V1 = 45.5 ml
V2= 49.1 ml
The initial volume of water was 45.5 ml, when iron piece of 28.5 grams was added the final volume was 49.1 ml.
Putting the values in the equation of density
p =
p = 7.91 g/ml
Since iron is a dense material it will occupy less volume