A toy doll and a toy robot are standing on a frictionless surface facing each other. The doll has a mass of 0.2 kg, and the robo
1 answer:
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Answer:
m = 0.111 kg
Explanation:
Heat required to release from the body of the person when his temperature cool down by 1 degree C is given as
here we know that
m = 70 kg
s = 3840 J/kg K
now we know that
now the same heat is used to vaporize water of the body
so it is given as
Answer:
75 m
Explanation:
The horizontal motion of the projectile is a uniform motion with constant speed, since there are no forces acting along the horizontal direction (if we neglect air resistance), so the horizontal acceleration is zero.
The horizontal component of the velocity of the projectile is
and it is constant during the motion;
the total time of flight is
t = 5 s
Therefore, we can apply the formula of the uniform motion to find the horizontal displacement of the projectile: