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Luba_88 [7]
4 years ago
10

You and Mae are in free-float frames. Mae has just passed you, traveling at a speed of 60 km/hr. You throw a ball toward her at

a speed of 60 km/hr. What will Mae see the ball doing?
Physics
1 answer:
Fantom [35]4 years ago
7 0

She will see the ball as if it were at rest. Relative to her she sees the earth moving back at 60km per hr while the ball moves forward at 60 km per hr. Therefore these velocities will “cancel” in her frame of reference and appear as if the ball were still

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Assuming two hypothetical maps that each cover a standard 8.5 by 11-inch sheet of paper, the larger-scale map would cover a larg
sukhopar [10]

Answer:

<em>b) false</em>

Explanation:

The scale of a map is the ratio of a distance on the map to the corresponding distance on the ground. Scaling allow us to capture a large geographical area on a reduced platform while still retaining the relative sizes and positioning of places on the map to their real life sizes and positioning. If both maps cover a standard 8.5 by 11-inch sheet of paper, then the map with the smaller ratio will have the bigger geographical area.

To understand better, let us assume two geographical areas A and B. A is bigger than B. If we were to put them both on the same area of map paper, then we'll have to scale up the smaller geographical area B so as to fit into the map paper. This means that the geographical area with the smaller area B will have the larger scale on the map.

8 0
3 years ago
A cart starting from rest rolls down a frictionless 1.0 m high hill. It travels a distance 2.0 m along the rough bottom surface
Rzqust [24]

Answer:

Option B is correct.

Explanation:

Given data

Height of the hill = AB = 1 m

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\sin \theta = \frac{AB}{AC}

\sin \theta = \frac{1}{2}

\theta = 30 °

We know that  the coefficient of kinetic friction is

\mu = \tan \theta

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\mu = 0.5

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Thus option B is correct.

8 0
3 years ago
What are the two ways that electrical current can travel while energizing devices and homes? Explain how the direction of travel
nexus9112 [7]
<span> In AC (alternating current) flow, like what comes out of your wall, the flow of electrons changes direction 60 times per second (50 times per second in Europe, China, etc). But in DC (direct current) flow, the average flow of electrons is in one direction only.
I hope it helped you</span>
5 0
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nexus9112 [7]

Answer:

Explanation:

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mvr = constant .

mv₁r₁ = mv₂r₂

v₁r₁ = v₂r₂

v₁ x 21 = 38 x 75

v₁ = 135.71 km/s .

6 0
3 years ago
A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it
Ilia_Sergeevich [38]

Below is the attachment of the solutions.

5 0
4 years ago
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