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Sidana [21]
3 years ago
12

You are conducting an experiment inside a train car that may move along level rail tracks. A load is hung from the ceiling on a

string. The load is not swinging, and the string is observed to make a constant angle of 45 degrees with the horizontal. No forces other than tension and gravity are acting on the load. Which of the following statements are correct? Choose all that apply. a) The train is an inertial frame of reference b) The train is not an inertial frame of reference c) The train may be instantaneously at rest d) The train may be moving at a constant speed in a straight line e) The train may be moving at a constant speed in a circle f) The train must be speeding up g) The train must be slowing down h) The train must be accelerating
Physics
1 answer:
katrin2010 [14]3 years ago
7 0

Answer:

b

c

e

h

Explanation:

Note that the swing direction was not giving in the question and direction could be sideways (in a turn) or in a track or both

The question show something in common ...acceleration

So let's look at the statements and pick the correct ones

a is false while b is correct as the train is accelerating

c is correct. The train is accelerating even thou the speed could not be ascertained

d is false and not feasible as the train is accelerating

e is true as the train maybe moving at a constant speed in a circle

f is false. This could be constant velocity in a circle. Same as g (false)

h is true. It's accelerating

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Canada’s northern territories experience "midnight sun," meaning what?.
Leona [35]

Answer:

Explanation:   The term "midnight sun" refers to the consecutive 24-hour periods of sunlight experienced in the north of the Arctic Circle and south of the Antarctic Circle. Other phenomena are sometimes referred to as "midnight sun", but they are caused by time zones and the observance of daylight saving time.

6 0
3 years ago
Why is gangue sometimes reprocessed.
VLD [36.1K]

Answer:

To win some of the ore associated with them as they can become more economical to produce.

Explanation:

Sometimes gangues are reprocessed so as to win back some of the ore that are associated with them as they become more economical to produce if the price of the metal goes up.

Gangues are undesired minerals that occurs in association with the desired ore. They are usually treated as wastes in mining.

  • Often times, gangues can become economical to mine.
  • Some gangues are not totally wastes, they are just undesired materials associated with the ore.
  • Under certain economic considerations, they might become economical and augment the ore being processed.
  • The price of the metal determines if the ore in the gangue should be won.
5 0
4 years ago
Identify some of the effects of urbanization
dangina [55]

Answer: Heyyyyyyyyyyyyyy

here you goo

"<u>some of the effects of urbanization</u>"

<em>Poor air and water quality, insufficient water availability, waste-disposal problems, and high energy consumption are exacerbated by the increasing population density and demands of urban environments</em>

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4 0
4 years ago
1. A message signal m(t) has a bandwidth of 5kHz and a peak magnitude of 2V. Estimate the bandwidth of the signal u(t) obtained
skad [1K]

Answer:

3v at 5.3 herts

Explanation:

4 0
3 years ago
At what distance from a 27 mw point source of electromagnetic waves is the electric field amplitude 0. 060 v/m ?
n200080 [17]

The distance from a 27 mw point source of electromagnetic waves where the electric field amplitude 0. 060 v/m will be 21.21 m .

Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.

The highest point of a wave is known as 'crest' , whereas the lowest point is known as 'trough'. Electromagnetic waves can be split into a range of frequencies. This is known as the electromagnetic spectrum.

c = 3 * 10^{8} m/s

∈ = 8.85 * 10^{- 12} C^{2} / N/ m^{2}

E = 0. 060 v/m

I = P / 4πr^{2}

Also , I = c ∈ E^{2} /2

r^{2} = P / 4π I                                 equation 1

substituting the value of I in equation 1

r^{2} = 2 P / 4π (c ∈ E^{2} )

r^{2} = 2 * 27 * 10^{-3} / 4 * 3.14 * 3 * 10^{8} * 8.85 * 10^{- 12}  * (0.06)^{2}

r = 21.21 m

To learn more about Electromagnetic waves  here

brainly.com/question/12392559

#SPJ4

5 0
2 years ago
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