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gulaghasi [49]
3 years ago
10

_________ is stored energy.

Physics
1 answer:
Ivan3 years ago
5 0

Answer:

I think so is b kinetic o a potential

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Chloe wanted to find out if the color of a food would affect how quickly kindergarten children would eat it for lunch. She belie
Harrizon [31]
A

The reason this is is because she the first sentence says that she believed that people would eat the mashed potatoes faster if they were brighter color.
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4 years ago
The electric motor of a model train accelerates the train from rest to 0.685 m/s in 21.5 ms. The total mass of the train is 875
Natali [406]

Answer:

P=9.58 W

Explanation:

According to Newton's second law, and assuming friction force as zero:

F_m=m.a\\F_m=0.875kg*a

The acceleration is given by:

a=\frac{\Delta v}{t}\\a=\frac{0.685m/s}{21.5*10^{-3}s}\\\\a=31.9m/s^2

So the force exerted  by the motor is:

F_m=0.875kg*31.9m/s^2\\F_m=27.9N

The work done by the motor is given by:

W_m=F_m*d\\\\d=\frac{1}{2}*a*t^2\\d=\frac{1}{2}*31.9m/s^2*(21.5*10^{-3}s)^2\\\\d=7.37*10^{-3}m

W_m=27.9N*7.37*10^{-3}m\\W_m=0.206J

And finally, the power is given by:

P=\frac{W_m}{t}\\P=\frac{0.206J}{21.5*10^{-3}s}\\\\P=9.58W

8 0
3 years ago
A 270,000 kg rocket in gravity -free space expels 270 kg of fuel by exerting a force of 360 N on it. Find the magnitude of the a
Brut [27]
F = m a 
360 = 270 x a
1.3 = a
4 0
3 years ago
Pre-questioning identifies a purpose for reading.
nadya68 [22]

Answer:

True

Explanation:

Pre-questioning may help a reader focus on information s/he hopes to find in the reading selection.

8 0
3 years ago
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What has research determined about the orbit of an electron around a nucleus?
sergeinik [125]
The one that research has determined about the orbit of an electron around nucleus is : Each sub-level electron type has a unique path where it will likely to be found
Here are the sub levels of an electron :
-sub level s, maximum number of 2 electrons
- sub level p, maximum number of 6 electrons
- sub level d, maximum number of 10 electrons
- sub level f, maximum number of 14 electrons
8 0
3 years ago
Read 2 more answers
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