Answer:
5 J
Explanation:
F = spring force required to stretch the spring = 10 N
x = stretch in the spring = 1 m
k = spring constant of the spring
Spring force is given as
F = k x
Inserting the values
10 = k (1)
k = 10 N/m
W = work done in stretching the spring
Work done is given as
W = (0.5)k x²
Inserting the values
W = (0.5) (10) (1)²
W = 5 J
The answer is B. A and C. Spring tides occur during a new moon and full moon
Answer:
1.04%
Explanation:
Given that,
The power of drill = 3.5 kW = 3500 W
Transferred kinetic energy = 5000 kJ during 15 seconds of use.
We need to find the percentage efficiency of the drill. It can be given by :
Where
Po and Pi are output and input powers.
So,
So, the percentage efficiency of the drill is 1.04%.
Answer:
A. Expanding personal knowledge by reading articles from scientific
journals
B. Analyzing the different parts of a physical phenomenon to see
how they fit together
C. Predicting the impact that answering an important scientific
question would have on people
D. Developing a question that can be answered through testing or
observation
E. Developing logical arguments for providing incentives for
scientific research
