Which of the following is a compound machine

Physics

2 answers:

Ivahew [28]4 years ago

8 0

The answer is c.

Hope this helps!!!!!!!!!!

Stells [14]4 years ago

3 0

The answer is bicycle

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What are Sir Issac Newton's three laws of motion?

Likurg_2 [28]

The first law is that every object stay at rest or stay in uniform motion in a straight line until it is forced to change its state by the action of an external force. This law is called law of inertia.

The second law is that the acceleration of an object is dependent upon two variables. the net force acting upon the object and the mass of the object. F= ma or force is equal to mass times acceleration. This law is known as the law of force and acceleration.

The third law is that for every action there is an equal and opposite reaction. every interaction there is a pair of forces acting on the two interacting objects. the size of forces on the first object equals the size of the force on the second object.

Hope this helps :)

can you please make this the brainliest answer it would really help . Thanks

4 0

3 years ago

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Sometimes waves interfere with one another. What type of interference occurs when the crests of one wave and the troughs of anot

olga55 [171]

Destructive interference :)

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4 years ago

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Which do you think will penetrate farther into a block of lean, x-rays or gamma rays? Explain your reasonings.

bagirrra123 [75]

I dont know if you mean lead instead of lean .
anyway i think <u>gamma rays</u> will penetrate further
this is because gamma rays are very penetrating , they have a shorter wave lenght than X-rays because the energy which produced them is greater .
Although both are similar but X-rays will become weaker and less penetrating when passing through a block of lead unlike the gamma rays eventhough it might reduse their intensity > but both will never stop ! .
This is a hard question!! 'cause both are similar but as i said i think gamma rays will penetrate further

6 0

3 years ago

When mass m is tied to the bottom of a long, thin wire suspended from the ceiling, the wire's second-harmonic frequency is 180 h

Katena32 [7]

The frequency of the nth-harmonic of a string is given by
$f_n = \frac{n}{2L} \sqrt{ \frac{T}{\mu} }$
where n is the number of the harmonic, L is the length of the string, T the tension and $\mu$ the linear density.

In our problem, since the mass m is tied to the string, the tension is equal to the weight of the object tied:
$T=mg$
Substituting into the first formula, we have
$f_n = \frac{n}{2L} \sqrt{ \frac{mg}{\mu} }$

In our problem we have n=2 (second harmonic). In the previous equation, the only factor which is not constant between the first and the second part of the problem is m, the mass. So, we can rewrite everything as
$f_2 = K \sqrt{m}$
where we called
$K= \frac{2}{2L} \sqrt{ \frac{g}{\mu} }$

In the first part of the problem, the mass of the object is m and $f_2 = 180 Hz$ . So we can write
$180 Hz = K \sqrt{m}$

When the mass is increased with an additional 1.2 kg, the relationship becomes
$270 Hz = K \sqrt{(m+1.2 Kg)}$

By writing K in terms of m in the first equation, and subsituting into the second one, we get
$180 Hz \sqrt{ \frac{m+1.2 Kg}{m} }=270 Hz$
and solving this, we find
$m=0.96 kg$

5 0

4 years ago

If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be A. equal to the weigh

Gala2k [10]

the correct answer is c

4 0

4 years ago