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3 years ago

When will the human population stop growing?

2 answers:

5 0

I think it’s when the sun explodes because since we need to the sun I think the human population will fall out. also a huge war, a meteoroid huge as the one that killed the dinosaurs comes down, there is so much ways on how the human population can stop growing. hope this help at least!

Rama09 [41]3 years ago

5 0

There’s many probabilities maybe like yk corona and stuff maybe with the vaccines it’ll turn to natural selection and people would be scared of having kids. Like the other person said when there’s no more sun because we could die off because it’s too cold. Maybe once there is no more plants because they are very vital to our daily lives.

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Which sets of data show a wave with the shortest wavelength? A. Speed=100 million m/s and frequency = 50 million Hz. B. Speed=15

SashulF [63]

The answer is <span>A. Speed=100 million m/s and frequency = 50 million Hz.</span>

Let's calculate for each choice the wavelength using the equation:
v = f × λ ⇒ λ = v ÷ f<span>

where:
v - the speed,
f - the frequency,
</span>λ - the wavelength.

A:
v = 100 000 000 m/s
f = 50 000 000 Hz = 50 000 000 1/s (Since f = 1/T, so units are Hz = 1/s)
⇒ λ = 100 000 000 ÷ 50 000 000 = 2 m

B:
v = 150 000 000 m/s
f = 1 500 Hz = 1 500 1/s
⇒ λ = 150 000 000 m/s ÷ 1 500 = 100 000 m

B:
v = 300 000 000 m/s
f = 100 Hz = 100 1/s
⇒ λ = 300 000 000 m/s ÷ 100 = 3 000 000 m

According to these calculations, the shortest wavelength is needed for choice A.

3 0

3 years ago

A load of bricks is lifted to the second floor of a building. How do work and power relate to this job?

Nady [450]

The faster the job is done, the greater the power

5 0

3 years ago

Read 2 more answers

A handel or knob is fixed at the free end of door. Why?

andriy [413]

Maximum torque.
T=F.r
r is measured from point of turning, which is the hinge. r is maximum when the handle is at the free edge.

5 0

3 years ago

Activity 4:

3241004551 [841]

Answer:

1.so that we won't do any mistakes and won't have injuries.

Explanation:

yes.

because it is a right thing to use correct tools for correct work.

4 0

3 years ago

Unpolarized light is incident upon two polarization filters that do not have their transmission axes aligned. If 21% of the ligh

Debora [2.8K]

Answer:

49.6°

Explanation:

$I_0$ = Unpolarized light

$I_2$ = Light after passing though second filter = $0.21I_0$

Polarized light passing through first filter

$I_1=\frac{I_0}{2}$

Polarized light passing through second filter

$I_2=\frac{I_0}{2}cos^2\theta\\\Rightarrow 0.21I_0=\frac{I_0}{2}cos^2\theta\\\Rightarrow cos^2\theta=\frac{0.21I_0}{\frac{I_0}{2}}\\\Rightarrow cos\theta=\sqrt{\frac{0.21I_0}{\frac{I_0}{2}}}\\\Rightarrow \theta=cos^{-1}\sqrt{\frac{0.21I_0}{\frac{I_0}{2}}}\\\Rightarrow \theta=cos^{-1}\sqrt{0.21\times 2}\\\Rightarrow \theta=cos^{-1}\sqrt{0.42}\\\Rightarrow \theta=49.6^{\circ}$

The angle between the two filters is 49.6°

5 0

4 years ago