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Anestetic [448]
4 years ago
10

Gerald works on a futuristic space station servicing interstellar space ships. He observes a ship traveling directly away from t

he space station at a speed of 0.6c. The ship launches a shuttle towards the space station with a speed of 0.7 c relative to the ship. What is the energy (including the rest energy) of the shuttle from the reference frame of the space station
Physics
1 answer:
julsineya [31]4 years ago
5 0

Answer:

9.14x10^22J

Explanation:

r= 1/√1-(0.17c)²/c²

1.01477

E= rmc²

9.14*10^22J

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Marcie shovels snow after a storm by exerting a force of 32 N on her shovel at an angle of 50 degrees to the vertical. What is t
gulaghasi [49]

Answer:

The horizontal component of the force exerted by Marcie is 25 N

Explanation:

Lets explain how to solve the question

Marcie shovels snow after a storm by exerting a force of 32 N on her

shovel at an angle of 50 degrees to the vertical

We need to find the horizontal component of the force exerted by Marci

The force direction is 50° to the vertical means

→ tan(50) = \frac{Fx}{Fy} , where x is the horizontal component

of the force and y is vertical component

→ tan(50) = \frac{sin(50)}{cos(50)}

By comparing between the two expressions of tan(50)

→ The horizontal component is Fx = F sin(50)

→ The vertical component is Fy = F cos(50)

We need the horizontal component

→ F = 32 N

→ The horizontal component = 32 sin(50) = 24.51 N ≅ 25 N

<em></em>

<em>The horizontal component of the force exerted by Marcie is 25 N</em>

6 0
3 years ago
A ball has a momentum of 35 kg·m/s. If the mass of the ball is 5.0 kg, what is the speed of the ball?
lana66690 [7]

Answer:

Simply divide the kgm/s by the 5kg

35kgm/s ÷ 5.0kg = 7m/s

4 0
3 years ago
Read 2 more answers
Stars seen in the night sky appear to move ____ relative to polaris.
Fed [463]

The answer is counter clockwise relative to the polaris. The polaris, also known as northern star would seem a bit more stable on the night sky as the point of vision is up north, the stars however around this would look as if it was rotating, left to right but since the earth is round in shape it follows a circular pattern.

5 0
3 years ago
???help???<br> \ /<br> lnl HELP PLS
xxTIMURxx [149]

Answer:

It comes from the word "moon" and it is because it takes a full moon cycle around the earth to complete a month, around 30 days

3 0
4 years ago
Read 2 more answers
A small uniform disk and a small uniform sphere are released simultaneously at the top of a high inclined plane, and they roll d
Yuri [45]

Answer:

the sphere

Explanation:

From the given information,

A free flow body diagrammatic expression  for the small uniform disk and a small uniform sphere which are released simultaneously at the top of a high inclined plane  can be seen in the image attached below.

From the diagram;

The Normal force mgsinθ - Friction force F  = mass m × acceleration a

Meanwhile; the frictional force

F = \dfrac{I \alpha }{R}

where

\alpha = \dfrac{a}{R}  in a rolling motion

Then;

F = \dfrac{I a }{R^2}

∴

The Normal force mgsinθ - F  =  m ×  a     can be re-written as:

\mathtt{mg sin \ \theta- \dfrac{Ia}{R^2} = ma}

making a the subject of the formula, we have:

a = (\dfrac{mg \ sin \theta}{m + \dfrac{I}{R^2}})

Similarly;

I = mk²  in which k is the radius of gyration

∴

replacing I = mk² into the above equation , we have:

a = (\dfrac{mg \ sin \theta}{m + \dfrac{mk^2}{R^2}})

where;

the uniform disk \dfrac{k^2}{R^2 }= \dfrac{1}{2}  

the uniform  sphere \dfrac{k^2}{R^2 }= \dfrac{2}{5}

∴

a = \dfrac{2}{3} \ g sin \theta \ for \ the \ uniform \ disk

a = \dfrac{5}{7} \ g sin \theta \ for \ the \ uniform \ sphere

We can now see that the uniform sphere is greater than the disk as such the sphere will reach the bottom first.

4 0
3 years ago
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