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4 years ago

I really need some help!!!

Physics

2 answers:

spayn [35]4 years ago

7 0

Explanation:

остановить время

liraira [26]4 years ago

5 0

Answer:

To stop time

Explanation:

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A spring with a spring constant of 25.1 N/m is attached to different masses, and the system is set in motion. What is its period

Ratling [72]

1) 2.17 s

The period of a mass-spring oscillating system is given by

$T=2 \pi \sqrt{\frac{m}{k}}$

where k is the spring constant and m is the mass attached to the spring. In this problem, we have

k = 25.1 N/m

m = 3.0 kg

Substituting into the equation, we find

$T=2 \pi \sqrt{\frac{3.0 kg}{25.1 N/m}}=2.17 s$

2) 0.46 Hz

The frequency of the oscillating system is equal to the reciprocal of the period:

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

Therefore, by substituting T=2.17 s, we find:

$f=\frac{1}{T}=\frac{1}{2.17 s}=0.46 Hz$

3) 0.13 s

As before, the period of a mass-spring oscillating system is given by

$T=2 \pi \sqrt{\frac{m}{k}}$

where k is the spring constant and m is the mass attached to the spring. In this part of the problem, we have

k = 25.1 N/m

m = 11 g = 0.011 kg

Substituting into the equation, we find

$T=2 \pi \sqrt{\frac{0.011 kg}{25.1 N/m}}=0.13 s$

4) 7.69 Hz

The frequency of the oscillating system is equal to the reciprocal of the period:

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

Therefore, by substituting T=0.13 s, we find:

$f=\frac{1}{T}=\frac{1}{0.13 s}=7.69 Hz$

5) 1.59 s

Again, the formula for the period of a mass-spring oscillating system is given by

$T=2 \pi \sqrt{\frac{m}{k}}$

In this part of the problem, we have

k = 25.1 N/m

m = 1.6 kg

Substituting into the equation, we find

$T=2 \pi \sqrt{\frac{1.6 kg}{25.1 N/m}}=1.59 s$

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4 years ago

Determine the centripetal force acting upon a 40-kg child who swings in a circle at a speed of 3 m/s. The radius of the swing is

Angelina_Jolie [31]

That would be mv^2/r = 40*3^2 / 20 = 18 N

4 0

3 years ago

Read 2 more answers

You discover a Cepheid variable star with a 30 day period in the Milky Way. Through careful monitoring for a few years with the

soldi70 [24.7K]

Answer:c

Explanation:

Bc it makes sense

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3 years ago

Before experimenting with the pendulum task apparatus, a teenager is asked which variable determines the rate of swinging, and s

solmaris [256]

Answer:

formal operations

Explanation:

In the period of formal operations the young man is already able to reason about hypotheses insofar as he is able to form abstract conceptual schemes and through them to perform mental operations within the principles of formal logic. With this, the adolescent acquires "the capacity to criticize social systems and propose new codes of conduct: discusses moral values of their parents and builds their own (thus acquiring autonomy)".

An example of the period of formal operations can be seen in the question above, where a teenager was able to think for himself how to test the hypotheses of an experiment to arrive at a concrete conclusion about it.

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3 years ago

How dangerous or painful is the recoil of a shotgun?

skelet666 [1.2K]

Answer:

If you’re going to be shooting a lot, get a surplus flak jacket. This isn’t a bulletproof vest, it just stops fragmentation or shrapnel. More importantly, it absorbs shock. You can fire a 12 gauge shotgun all day long and you won’t feel sore at all.

hope it helps

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3 years ago