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gladu [14]
3 years ago
11

ANSWER ASAP PLS Finn drew a diagram to compare Einstein’s two postulates of relativity. A venn diagram with 2 intersecting circl

es. The circle on the left is labeled first postulate and the circle on the right is labeled second postulate. There is an X in the first postulate circle, a Z in the second postulate circle and a Y in the intersecting area. Which labels belong in the areas marked X, Y, and Z? X: applies to objects moving almost at the speed of light Y: describes the effect of constant motion in space on time Z: speed of light is always 3.0 × 108 m/s X: speed of light is always 3.0 × 108 m/s Y: applies to objects moving almost at the speed of light Z: describes the effect of constant motion in space on time X: speed of light through empty space is the same for all observers Y: laws of physics are the same for all uniformly moving frames of motion Z: applies to objects with constant velocity X: laws of physics are the same for all uniformly moving frames of motion Y: applies to objects with constant velocity Z: speed of light through empty space is the same for all observers
Physics
2 answers:
jarptica [38.1K]3 years ago
9 0

Answer:

answer is option d

Explanation:

just took unit test edg 2021

Sergio039 [100]3 years ago
6 0

Answer:

Answer is D

Explanation:

edg 2021 D!!

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A locomotive is accelerating at 1.6 m/s2. it passes through a 20.0-m-wide crossing in a time of 2.4 s. after the locomotive leav
ladessa [460]

<u>Answer:</u>

After reaching crossing locomotive takes 17.6 seconds to reach velocity 32 m/s.

<u>Explanation:</u>

  Acceleration of locomotive = 1.6 m/s^2

  Time at which it crosses crossing = 2.4 seconds.

  We have equation of motion, v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration and t is the time taken.

  When it reaches 32 m/s, v = 32 m/s, u = 0 m/s, a= 1.6 m/s^2 seconds.

   32 = 0 + 1.6 * t

    t = 20 seconds.

  So locomotive's velocity is 32 m/s after 20 seconds and it reaches crossing at 2.4 seconds.

  So after reaching crossing it takes 17.6 seconds to reach velocity 32 m/s.

6 0
4 years ago
Read 2 more answers
A one-piece cylinder has a core section protruding from the larger drum and is free to rotate around its central axis. A rope wr
Sunny_sXe [5.5K]

Answer:

Explanation:

Torque created by force 3.34N

= 3.34 x 1.39 = 4.64 N.m

This torque is acting in clockwise direction .

Torque created by force 8.52 N

8.52 x .48

= 4.09 N.m

The force of 8.52 N is acting downward . It may turn the cylinder in clockwise or anticlockwise direction . So we shall consider both the possibilities.

If it rotates the cylinder in clockwise direction

Total torque = 4.64 + 4.09

= 8.73 Nm

If it rotates the cylinder in anticlockwise direction

Total torque = 4.64 - 4.09

= .55 Nm

Net torque will be in clockwise direction.

5 0
3 years ago
The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 2.0 rev/s in 10.0 s. At th
Arte-miy333 [17]

Answer:

22 revolutions

Explanation:

2 rev/s = 2*(2π rad/rev) = 12.57 rad/s

The angular acceleration when it starting

\alpha_a = \frac{\Delta \omega}{\Delta t} = \frac{12.57}{10} = 1.257 rad/s^2

The angular acceleration when it stopping:

\alpha_o = \frac{\Delta \omega}{\Delta t} = \frac{-12.57}{12} = -1.05 rad/s^2

The angular distance it covers when starting from rest:

\omega^2 - 0^2 = 2\alpha_a\theta_a

\theta_a = \frac{\omega^2}{2\alpha_a} = \frac{12.57^2}{2*1.257} = 62.8 rad

The angular distance it covers when coming to complete stop:

0 - \omega^2 = 2\alpha_o\theta_o

\theta_o = \frac{-\omega^2}{2\alpha_o} = \frac{-12.57^2}{2*(-1.05)} = 75.4 rad

So the total angular distance it covers within 22 s is 62.8 + 75.4 = 138.23 rad or 138.23 / (2π) = 22 revolutions

6 0
4 years ago
Why are recessive traits not seen even though they are present in the alleles?​
Rama09 [41]

Answer:

Explanation:. The vending machine holds 10 bags of pretzels and 8 packs of cheese crackers.  Both the pretzels and crackers dispenseat 2 bags per hour. How many hours will elapse when there is the same number of snacks remaining in the vending machine?  How many of each item will there be at this point?Equation1______________________________Equation2_______________________________Hours: ___________________________ Items: ____________________________What does each equation have n common? ______________________How does this affect the solution?

3 0
3 years ago
A student does 25 J of work on the handle of a pencil sharpener. If the pencil sharpener does 20 J of work on the pencil, what i
allsm [11]

Answer:

80%

Explanation:

Efficiency of machine = work output/work input  ×100 %

From question, work output = 20J

Work input = 25J.

Therefore efficiency = 20/25 × 100 %

Efficiency = 20×4 %

Efficiency = 80%

I hope this was helpful, please mark as brainliest

3 0
3 years ago
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