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2 years ago

Which statement is true?

Physics

1 answer:

vivado [14]2 years ago

4 0

Answer:

The speed of sound in air is not affected by the temperature

Explanation:

It just isn't™

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child mass 25kg moves with speed of 1.5m/s when 7.8 from the central of merry-go round. calculate the centripetal acceleration o

MAVERICK [17]

Answer:

0.2885 m/s²

Explanation:

The formula for centripetal acceleration is given as;

$a_c=v^2/r$

Given that;

speed = v = 1.5m/s

radius = r = 7.8

$a_c=v^2/r\\\\\\a_c=1.5^2/7.8\\\\\\a_c=0.2885m/s^{2}$

8 0

2 years ago

At what speed must the electron revolve round the nucleus of

EleoNora [17]

Explanation:

I think this is it, give it a try

6 0

2 years ago

Choose all that represent ways that Venus is different than Earth.

Ganezh [65]

The answer is C because carbon dioxide is trapped in a thick atmosphere.

7 0

2 years ago

Two teams of nine members each engage in a tug of war. Each of the first team’s members has an average mass of 68 kg and exerts

CaHeK987 [17]

Answer:

65.01 N

Explanation:

N = 9

m1 = 68 kg

m2 = 73 kg

F1 = 1350 N towards left

F2 = 1365 N towards right

Fleft = N x F1 = 9 x 1350 = 12150 N

FRight = N x F2 = 9 x 1365 = 12285 N

Fnet = Fright - Fleft = 12285 - 12150 = 135 N right

Let a be the acceleration

a = Fnet / N(m1 + m2) = 135 / 9(68 + 73) = 0.1064 m/s^2

Let T be the tension in the rope

By the Newton's second law

Fnet - T = 9 m2 x a

135 - T = 9 x 73 x 0.1064

T = 65.01 N

3 0

2 years ago

Five stars are shown on the following H-R diagrams. Rank the stars based on their surface temperature from highest to lowest. If

masha68 [24]

All five stars appear at the same place along the horizontal axis showing spectral type.

Because spectral type is related to surface temperature, all five stars must have the same surface temperature.

Now proceed to Part C to determine how these stars vary in luminosity.

This refers to the heavenly body that is a natural luminous body that is visible in the sky, especially at night

Hence, we can see that based on the ranking of stars, the surface temperature of each star is taken into account, and based on their spectral type, the stars all have the same temperature.

Therefore, to show the difference between the stars, their luminous intensity needs to be analyzed,