Answer:
65.14 g
Explanation:
The change in the entropy of two ,metals on mixing is
Here, R is real gas constant, n_{cu} is the number of moles of the copper, and n_{Ni} is the number of moles of nickel
Thus the number of moles of Nickel is
=1.7 moles
now put n_{Ni} = 1.7 ΔS= 15,
R= 8.314 and solve
On solving the number of moles of copper in the mixture
n_cu= 1.025
Thus the mass of copper is = n_cu×M_cu = 1.025×63.55 = 65.14 g
Therefore the required mass is = 65.14 g
The impulse is 10 kg m / s.
<u>Explanation:</u>
An impulsive force is a short duration of force. The result of the force acting for the given amount of time is that the object's speed up or slow down of mass. The impulse experienced equals the change in momentum of the object.
Given the mass m = 1.0 kg
The formula is given as,
Impulse = mass ( change in velocity)
= 1.0 ( 10 - 0)
Impulse = 10 kg m /s.
Answer:
Explanation:
acceleration of an object on an inclined plane due to gravitational pull
= g sinθ . This acceleration is irrespective of mass of the object coming down . It only depends on the inclination .
If θ is larger , sinθ will be larger hence gravitational acceleration on inclined surface will be greater . It happens so because a component of weight mg is acting on the body . This component is mgsinθ . The other component mgcosθ acts perpendicular to surface hence it does not contribute to its acceleration .
acceleration produced = force / mass
= mgsinθ / m
= gsinθ .
in the given case , the inclination of plane with mass m₁ is less , hence its downward acceleration will be lesser as compared with the acceleration of m₂ which is put on a surface with greater inclination .