The energy needed the raise the temperature of the block of silver is given by:
where m is the mass of the block, Cs the specific heat capacity of silver and
its increase in temperature.
Using the numbers of the problem, we find
Friction = 0.25 * m * g = 10.8
Push = m * a + Friction = 4.4 * 1.5 + 10.8
Answer: B.) HYDROPLANE
Explanation: The term hydroplane can be used to refer to a condition which usually occur during a downpour or on surfaces covered by water. It occurs when water forms a barrier or comes in between the frictional grip which occurs between the road surface and the car tyres. The contact between the car tyres and the road surface is supposed to give adequate frictional support which prevents the car from skidding or skidding uncontrollably on the road surface. However, when water comes invetween the surface, traction is lost and skidding results due to very low Coefficient of friction between the road and Tyre which was supposed to provide a firm grip between the tyres and the road surface.
Answer:
Efficiency = 5%
Explanation:
Given that,
Supplies energy to the bulb = 100 J
Transferred energy by the bulb = 5 J
We need to find the efficiency of the bulb. It can be given by "
So, the efficiency of the bulb is 5%.
Answer:
57.0 m
Explanation:
Given:
v₀ = 0 m/s
t = 3.41 s
a = 9.8 m/s²
Find: Δx
Δx = v₀ t + ½ at²
Δx = (0 m/s) (3.41 s) + ½ (9.8 m/s²) (3.41 s)²
Δx = 57.0 m
