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3 years ago

You exert 20 newtons of force on the hammer to remove the nail. The hammer exerts 90

Physics

1 answer:

andrezito [222]3 years ago

7 0

Answer:

20 n

Explanation:

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The number of times that a wave vibrates in unit is called

kari74 [83]

I believe it's frequency.

6 0

3 years ago

Models that explain the formation of the solar system through a series of gradual steps are considered evolutionary theories. Wh

lora16 [44]

Answer:

Catastrophic theories

Explanation:

The theory of catastrophe is a collection of methods used to analyze and describe the ways in which a system can experience sudden significant behavioral changes when one or more of the variables that govern it are continuously modified.

Georges Louis de Buffon suggested in 1745 the first destructive theory — that a comet pulled material from the Sun to form the planets.

Therefore the answer is -

Catastrophic theories

4 0

3 years ago

a block of mass m slides along a frictionless track with speed vm. It collides with a stationary block of mass M. Find an expres

shusha [124]

Answer:

Part a) When collision is perfectly inelastic

$v_m = \frac{m + M}{m} \sqrt{5Rg}$

Part b) When collision is perfectly elastic

$v_m = \frac{m + M}{2m}\sqrt{5Rg}$

Explanation:

Part a)

As we know that collision is perfectly inelastic

so here we will have

$mv_m = (m + M)v$

so we have

$v = \frac{mv_m}{m + M}$

now we know that in order to complete the circle we will have

$v = \sqrt{5Rg}$

$\frac{mv_m}{m + M} = \sqrt{5Rg}$

now we have

$v_m = \frac{m + M}{m} \sqrt{5Rg}$

Part b)

Now we know that collision is perfectly elastic

so we will have

$v = \frac{2mv_m}{m + M}$

now we have

$\sqrt{5Rg} = \frac{2mv_m}{m + M}$

$v_m = \frac{m + M}{2m}\sqrt{5Rg}$

6 0

4 years ago

Kamal, Kamala, Krishna invert a sum of RS= 30,000 on a business in the ratio 2 : 3 : 5. Find the each of their investment.

Crazy boy [7]

Here's the solution,

Let the shares be 2x, 3x and 5x according to their shared investment ratio,

now, we know :

=》2x + 3x + 5x = 30000

=》10x = 30000

=》x = 3000

So, value of x = 3000

hence, the share of each shareholder is :

kamal = 2x = 6000
kamala = 3x = 9000
Krishna = 5x = 15000

i hope it helped.....

3 0

3 years ago

Read 2 more answers

What are three areas of science that rely on physical science?

yanalaym [24]

"physical science" is a branch of science that is based on practical tests and explanations of the different phenomena. It is based on scientific evidence and tests/experiments.

Some of the branches that are based on physical science are:
1- Astronomy
2- Electronics
3- Engineering
4- Radiology

5 0

3 years ago

Read 2 more answers