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3 years ago

ONLY ANSWER IF YOU KNOW FOR SURE PLEASE :)

Physics

1 answer:

sveticcg [70]3 years ago

6 0

Answer:

Question one is b, Question two is b, and question three is b, im pretty positive that what it is

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How much work is needed to stretch this spring a distance of 5.0 cm , starting with it unstretched?

olganol [36]

The spring's work output while it is not extended is 5 J.

<h3>What is The Hooke's law ?</h3>

According to Hooke's law, as long as the elastic limit is not exceeded, the extension of a particular material is directly proportional to the force applied. Hence, we must be aware of that F = Ke

F = Applied force

Force constant is K.

Extension = e

F = applied force

Force constant is K.

Extension = e

Using the graph

K = F/e

F = 200N

E equals 5 cm or 5 * 10-2 m

K = 200N/ 5 * 10^-2 m

K = 4000 N/m

Now;

Work = 1/2Ke^2

Work = 0.5 * 4000 N/m * (5 * 10^-2 m)^2

Work = 5 J

To know more about Hooke's Law visit:

brainly.com/question/13348278

#SPJ4

4 0

1 year ago

A rotating cylinder about 16 km long and 7.8km in diameter is designed to be used as a space colony.

Semmy [17]

Answer:

0.05 rad/s

Explanation:

7.8 km = 7800 m

For the residents inside the space cylinder to experience the same gravitation acceleration g = 9.81m/s2 on Earth, the centripetal acceleration must be the same as g

$a = g$

But centripetal acceleration is product of angular velocity squared and radius of rotation r

$\omega^2r = 9.81$

$\omega^2 d/2 = 9.81$

$\omega^2 = \frac{2*9.81}{d} = \frac{19.62}{7800} = 0.0025$

$\omega = \sqrt{0.0025} = 0.05 rad/s$

3 0

3 years ago

Explain what will happen of the copper pipe in the solar panel are replaced with Pvc pipes

alisha [4.7K]

Answer:

Copper is the logical material for solar energy systems because:

[1] It has the best thermal conductivity of all engineering metals;

[2] Highly resistant to corrosion;

[3] Easy to fabricate

[4] Has been used both for plumbing and for roofs since metals were first employed in those applications.

For water heating and low-pressure steam, use of Type M tubes is recommended.

4 0

3 years ago

Object a and object b are both in motion when they collide with each other. They then continue in a new direction unaffected by

Harrizon [31]

This is an elastic collision

bcuz i think they move apart after the collision

sorry if im wrong

8 0

3 years ago

A woman is standing in the ocean, and she notices that after a wave crest passes by, five more crests pass in a time of 39.5 s.

Gnoma [55]

(a) 7.9 s

The period of a wave is time that passes between two consecutive crests (or two consecutive troughs).

In this case, we are told that five crests pass in a time of 39.5 s. Therefore we can find the period by using the proportion:

$\frac{5}{39.5 s}=\frac{1}{T}$

Where T is the period. Re-arranging the equation, we find

$T=\frac{(39.5)(1)}{5}=7.9 s$

(b) 0.127 Hz

The frequency of a wave is equal to the reciprocal of the period:

$f=\frac{1}{T}$

where

f is the frequency

T is the period

For this wave, we have T = 7.9 s, so its frequency is

$f=\frac{1}{7.9 s}=0.127 Hz$

(c) 37.9 m

The wavelength of a wave is the distance between two consecutive crests (or two consecutive troughs). For this wave, the distance between two successive crests is 37.9 m, so the wavelength of the wave is

$\lambda=37.9 m$