Answer:
16.96 W
Explanation:
Power: This can be defined as the rate at which work is done by an object. The S.I unit of power is Watt(W).
From the question,
P = (F×d)/t....................... Equation 1
Where P = power, F = force, d = distance, t = time.
Given: F = 75 N, d = 42 m, t = 3.1 min = 3.1×60 = 186 s
Substitute these values into equation 1
P = (75×42)/186
P = 16.94 W
Hence the average power delivered by the child = 16.96 W
Answer:
8N/m
Explanation:
The elastic potential energy stored can be calculated using the equation:
elastic potential energy = 0.5 × spring constant × (extension)2
assuming it is not stretched beyond the limit of proportionality.
Then calculate using the values in the question:
100J = 0.5 × spring constant × 5²
200J = spring constant × 25
spring constant = 200J ÷ 25m²
spring constant = 8J/m²
spring constant = 8N/m
Answer:
The object's velocity would increase due to the change in force.
Explanation:
Answer:
Mendeleev predicted the atomic mass of each element along with compounds they each should form.
Explanation:
Based on other elements in the same group he predicted the existence of eka-aluminum and eka-silicon, later to be named gallium (Ga) and germanium (Ge).
