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artcher [175]
3 years ago
8

PLEASE HELP ME THESE ARE DUE IN AN HOUR!!!!!!

Physics
1 answer:
pav-90 [236]3 years ago
5 0
1. 2700 joules 

2.  im not sure about this one give me a sec
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Xavier is roller skating at 14 km/h and tosses a set of keys forward on the ground at 8 km/h. The speed of the keys relative to
Arturiano [62]

Answer:

22 km/h

Explanation:

Given that,

Speed of Xavier, v = 14 km/h

He tosses a set of keys forward on the ground at 8 km/h, v' = 8 km/h

We need to find the speed of the keys relative to the ground. Let it is V.

As both Xavier and the keys are moving in same diretion. The relative speed wrt ground is given by :

V = v+v'

V= 14 + 8

V = 22 km/h

So, the speed of the keys relative to the ground is 22 km/h.

4 0
2 years ago
A material that can easily flow is called a
murzikaleks [220]
A material that can easily flow is called a...

A. Fluid.
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3 years ago
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Two parakeets sit on a swing with their combined center of mass 10.0 cm below the pivot. At what frequency do they swing?
Oksanka [162]

Answer:

1.58 Hz

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7 0
3 years ago
Which of the following was NOT a department in Washington's first cabinet?
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I believe its C: Secretary of War. I hope this helped :)

Explanation:

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Bullets spin when shot from a rifle or handgun. What causes this spinning?
tamaranim1 [39]

Answer:

The spark from the primer ignites the gunpowder. Gas converted from the burning powder rapidly expands in the cartridge. The expanding gas forces the bullet out of the cartridge and down the barrel with great speed. The rifling in the barrel causes the bullet to spin as it travels out of the barrel.

Explanation:

7 0
2 years ago
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