3 years ago

A student has paper sitting at rest on their desk. Which of the following statements best describes this situation?

Physics

2 answers:

ValentinkaMS [17]3 years ago

8 0

C. The forces acting on the paper are balanced .

-There are several forces acting on your paper, but they balance each other.

nirvana33 [79]3 years ago

3 0

Answer: c

Explanation: hey xdd

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A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to th

boyakko [2]

Answer:

8.76762 m

Explanation:

T = Time period = 5.94 seconds

g = Acceleration due to gravity = 9.81 m/s²

L = Length of pendulum = Height of tower

Time period is given by

$T=2\pi \sqrt{\dfrac{L}{g}}\\\Rightarrow T^2=4\pi^2\dfrac{L}{g}\\\Rightarrow L=\dfrac{T^2g}{4\pi^2}\\\Rightarrow L=\dfrac{5.94^2\times 9.81}{4\pi^2}\\\Rightarrow L=8.76762\ m$

The height of the tower is 8.76762 m

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3 years ago

I dont know how to do question 3，4

dlinn [17]

<span>Prior to the Cambrian, organisms with hard parts (eg. shells and bones) weren't present for most the time, and it's generally such hard parts that get to fossilize. There's also been more time for Precambrian deposits to get destroyed by natural processes, </span>

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3 years ago

Express newton pascal joule and watt in fundamental unit

Nadya [2.5K]

i added an image. i hope it helped :)