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eimsori [14]
2 years ago
10

When is a secondary source more helpful than a primary source?

Physics
1 answer:
UNO [17]2 years ago
8 0

Answer:

I think the answer is C.

Explanation:

A primary source is a first hand account of an event while a secondary source is a retelling or second hand account meaning as many details will be prevalent.

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The period of a pendulum is the time it takes for the pendulum to make one full​ back-and-forth swing. The period of a pendulum
mixer [17]

Answer: 0.04 s

Explanation:

The given equation for the period T of a pendulum when the acceleration due gravity is given in feet per squared second g=32 ft/s^{2} is:

T=2 \pi \sqrt{\frac{l}{32 ft/s^{2}}}

Where l=\frac{1}{18} ft is the length of the pendulum

T=2 \pi \sqrt{\frac{\frac{1}{18} ft}{32 ft/s^{2}}}

T=0.04 s

3 0
4 years ago
When resistance force is increased on a lever which of the following happens to the effort force?
Sauron [17]
When resistance force on a lever increases, nothing happens automatically. 
But if you want to keep lifting the load, then YOU must increase the force of
your effort in order to make it happen.
8 0
3 years ago
Three short square wood blocks measuring 3.5 per side support a machine weighing 29500 lbs. What is the compressive stress in th
Ilya [14]

Answer:

D. 803 lbs

Explanation:

In order to find the compressive stress on all three blocks we first need to find the normal surface area of each:

Surface Area of 1 Block = 3.5 x 3.5

Surface Area of 1 Block = 12.25

Surface Area of all 3 Blocks = A = 3 x 12.25

Area = 36.75

Now, the stress is given by the following formula:

Stress = Force/Area

Stress = 29500 lbs/36.75

Stress = 802.72 lbs

Hence, the correct option will be:

<u>D. 803 lbs</u>

4 0
4 years ago
For a science, you must build a model of an aquiefier. What material would be best to use for where the water will accumulate?
aleksklad [387]
Answer is C.

Water-holding capacity is controlled primarily by soil texture, and amount of organic matter. Soils with small particles containing clay have a larger surface are than those larger sand particles, and a large surface area that allows to hold more water.
5 0
3 years ago
As elevation above sea level increases, water vapor does what?
inessss [21]
Water vapor decreases
3 0
3 years ago
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