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Murrr4er [49]
3 years ago
5

Good Luck! And Happy Weekend!

Physics
1 answer:
Anastaziya [24]3 years ago
7 0
<h3><u>Question</u> :</h3>

Circle the scenario that shows balanced forces and will result in no movement of the gold bar.

<h3><u>Answer</u> :</h3><h3 />
  • 1st one is the scenario that shows balanced forces and will result in no movement of the gold bar. (circled in attachment)

<h3><u>Explanation</u> :</h3>

In the first scenario there are equal forces of 5N acting on both sides of the gold bar, but this is not the case for the second and third scenarios. Equal forces are acting on both sides of the bar in the first scenario, hence showing balanced forces and resulting in no movement of the gold bar.

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A truck initially traveling at a speed of 22 m/s increases at a constant rate of 2.4 m/s^2 for 3.2s. What is the total distance
FinnZ [79.3K]

Answer:

82.7 m

Explanation:

u= 22m/s

a= 2.4 m/s^2.

t= 3.2 secs

Therefore the distance travelled can be calculated as follows

S= ut + 1/2at^2

= 22 × 3.2 + 1/2 × 2.4 × 3.2^2

= 70.4 + 1/2×24.58

= 70.4 + 12.29

= 82.7 m

Hence the distance travelled by the truck is 82.7 m

6 0
3 years ago
If a quasar is moving away from us at v/c = 0.8, what is the measured redshift?
Delicious77 [7]

Answer:

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Explanation:

Since the object is traveling near light speed, since v/c = 0.8, then we have to use a redshift formula for relativistic speeds.

z= \sqrt{\cfrac{c+v}{c-v}}-1

Finding the redshift.

We can prepare the formula by dividing by lightspeed inside the square root to both numerator and denominator to get

z= \sqrt{\cfrac{1+\cfrac vc}{1-\cfrac vc}}-1

Replacing the given information

z= \sqrt{\cfrac{1+0.8}{1-0.8}}-1

z= \sqrt{\cfrac{1.8}{0.2}}-1\\z= \sqrt{9}}-1\\z=3-1\\z=2

Thus the measured redshift is z = 2.

4 0
3 years ago
One of the signs a chemical reaction is taking place
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Answer:  One of the signs a chemical reaction is taking place is the presence of bubbles. :)

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Answer:

0.68 m

Explanation:

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Therefore, to repeat constructive interference at the listener's ear, a distance of 0.68 m is needed

4 0
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Answer:

The temperature rises by 0.52K

Explanation:

Detailed explanation and calculation is shown in the image below

5 0
3 years ago
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