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Nady [450]
3 years ago
8

Day and night are caused by the earths blank

Physics
1 answer:
professor190 [17]3 years ago
5 0
The answer is Earths rotation
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What are various paradox related to time travel?​
erma4kov [3.2K]

Answer:

This is a paradox — an inconsistency that often leads people to think that time travel cannot occur in our universe." A variation is known as the "grandfather paradox" — in which a time traveler kills their own grandfather, in the process preventing the time traveler's birth

Explanation:

hope this Wil help ....

5 0
3 years ago
a 1020-hertz sound wave travels at 340 m/s in air with a wavelength of a) 30 m. b) 3 m. c) 0.333 m. d) 1 m. e) none of the above
eimsori [14]

The wavelength of the sound wave is equal to 0.333 m. Therefore, option (c) is correct.

<h3>What are frequency and wavelength?</h3>

The frequency of the wave can be defined as the number of oscillations that occur in one second and can be expressed in hertz. The wavelength can be defined as the distance between the two adjacent points of a wave such as two crests or troughs.

The relationship between frequency (ν), speed of sound waves (V), and  wavelength (λ):

V = νλ

Given, the frequency of the sound wave, ν = 10 Hz

The speed of the sound wave,V = 340 m/s

The wavelength of the sound waves can determine as follows

λ = V/ν = 340/1020 = 0.333 m.

Therefore, the wavelength of the sound wave is 0.333 m

Learn more about wavelength and frequency, here:

brainly.com/question/18651058

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5 0
1 year ago
Which orbit has the highest energy?<br> n = 1<br> n = 2<br> n = 3
PIT_PIT [208]

Answer:

3

Explanation:

The closer an orbit is to the nucleus the fewer energy

4 0
3 years ago
Three identical satellites, X, Y, and Z are in outer space. The distance from satellite X to Y is 450 km, the distance from Y to
hodyreva [135]
Gravity is stronger the closer you get. It is D.
3 0
3 years ago
Energy is transferred as the heat between two objects, one with a temperature of 5 C and the other with a temperature of 20 C. I
Delicious77 [7]

Answer:

Final temperature is located between 5 °C and 20 °C.

Explanation:

The object with high temperature transfers energy to the object with low temperature until thermal equilibrium is reached, that is, when both objects have the same temperature.

Q_{H} = -Q_{L}

C_{H}\cdot (20^{\textdegree}C - T) = -C_{L}\cdot (5^{\textdegree}C-T)

20\cdot C_{H} - C_{H}\cdot T = -5\cdot C_{L}+ C_{L}\cdot T

(C_{H}+C_{L})\cdot T=20\cdot C_{H} + 5\cdot C_{L}

T = 20\cdot\frac{C_{H}}{C_{L}+C_{H}} + 5\cdot \frac{C_{L}}{C_{L}+C_{H}}

Now, let consider three scenarios:

Scenario 1 - C_{H} = C_{L]

T = 12.5^{\textdegree}C

Scenario 2 - C_{H}>> C_{L}

T = 20^{\textdegree}C

Scenario 3 - C_{H}

T = 5^{\textdegree}C

Final temperature is located between 5 °C and 20 °C.

8 0
3 years ago
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