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2 years ago

What is a wavelength?

1 answer:

6 0

A wavelength is the distance between two identical peaks, troughs or crests in a wave. The unit of wavelength can be meters, centimeters, millimeters, nanometers and so on.

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The figure shows three displacement vectors, which are

aleksley [76]

Answer:

the correct answer is D

Explanation:

In this exercise, the vectors are in the same west-east direction, so we can assume that the positive direction is east and perform the algebraic sum.

R = δ + ε

where

δ = 2.0 m

ε = 7.0 m

the positive sign indicates that it is heading east

R = 2.0 + 7.0

R = 9.0 m

the direction is east

the correct answer is D

8 0

2 years ago

Alex is asked to move two boxes of books in contact with each other and resting on a rough floor. He decides to move them at the

Over [174]

Answer:

Part a)

$a= 0.32 m/s^2$

Part b)

$F_c = 3.6 N$

Part c)

$F_c = 5.5 N$

Explanation:

Part a)

As we know that the friction force on two boxes is given as

$F_f = \mu m_a g + \mu m_b g$

$F_f = 0.02(10.6 + 7)9.81$

$F_f = 3.45 N$

Now we know by Newton's II law

$F_{net} = ma$

so we have

$F_p - F_f = (m_a + m_b) a$

$9.1 - 3.45 = (10.6 + 7) a$

$a = \frac{5.65}{17.6}$

$a= 0.32 m/s^2$

Part b)

For block B we know that net force on it will push it forward with same acceleration so we have

$F_c - F_f = m_b a$

$F_c = \mu m_b g + m_b a$

$F_c = 0.02(7)(9.8) + 7(0.32)$

$F_c = 3.6 N$

Part c)

If Alex push from other side then also the acceleration will be same

So for box B we can say that Net force is given as

$F_p - F_f - F_c = m_b a$

$9.1 - 0.02(7)(9.8) - F_c = 7(0.32)$

$F_c = 9.1 - 0.02 (7)(9.8) - 7(0.32)$

$F_c = 5.5 N$

3 0

2 years ago

Categorize the particles according to whether they are found in the nucleus or the electron cloud.

inna [77]

1. neutral particles (neutrons) are in the nucleus
2. nucleus is in the nucleus
3. electron cloud is in the electron cloud
4. positively charged particles (protons) are in the nucleus
5. negatively charged particles (electrons) are in the electron cloud

4 0

2 years ago

Read 2 more answers

I need help on all of them

oksano4ka [1.4K]

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6 0

2 years ago

ou see an image of yourself in a mirror because light waves are A) diffracted. B) reflected back at you. C) refracted through ai

Oksi-84 [34.3K]

The answer would be B) reflected back at you

6 0

2 years ago

Read 2 more answers