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Eva8 [605]
3 years ago
9

A scientist designed a foam container to help keep frozen foods from melting. Which best explains how the foam works?

Physics
2 answers:
FrozenT [24]3 years ago
6 0
I think the answer should be D.<span>It reduces the amount of thermal energy that is transferred from outside to inside the container. </span>
Ganezh [65]3 years ago
3 0

Answer:

c

Explanation:

i got it on my test

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Kyle has a mass of 54kg and is moving at 3 m/s what is his kinetic energy
Mars2501 [29]

Answer:

243J

Explanation:

K.E = 1/2 x 54 x 3^2

K.E = 1/2 x 54 x 9

K.E = 1/2 x 486

K.E = 486/2

K.E = 243J

6 0
3 years ago
What is weight?
OverLord2011 [107]

Answer:

C

Explanation:

The answer is C) the mass of an object

8 0
3 years ago
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An attack helicopter is equipped with a 20- mm cannon that fires 87 g shells in the forward direction with a muzzle speed of 853
uysha [10]

Answer

given,

mass of the shell = 87 g = 0.087 Kg

speed of the muzzle = 853 m/s

mass of the helicopter = 4410 kg

A burst of 176 shell fired in 2.93 s

resulting average force = ?

momentum of the shell = m v

                                       = 0.087 x 853

                                       = 74.21 kgm/s

momentum of 176 shell is = 176 p

                                          = 176 x 74.21

                                          = 13060.96

momentum of helicopter = - 13060.96 kgm/s

amount of speed reduce a = \dfrac{13060.96}{M}

                                          a= \dfrac{13060.96}{4410}

                                          a = 2.96 m/s²

velocity  = \dfrac{2.96}{2.93}

      v = 1.01 m/s

5 0
3 years ago
Read 2 more answers
Which of the following are evidence for the big bang theory
irina1246 [14]

Answer:

Big Bang theory has occurred because about two thousand million years ago, a star came close to the sun. The molten mass on it melted and formed a huge mountain. Due to the high pressure, the star repelled back and the mountain separated into pieces. These pieces started revolving aound the sun and are known as planets. The existence of these planets is known as big bang theory.

Explanation:

4 0
3 years ago
A hydraulic lift raises a 2 000-kg automobile when a 500-N force is applied to the smaller piston. If the smaller piston has an
Marina CMI [18]

Answer:

Explanation:

ratio of the forces is equal to the ratio of the surface areas

which is another way of saying the pressure is constant in the system

2000(9.8) / 500 = A / 10

A = 2000(9.8)(10) / 500 = 392 cm²

6 0
3 years ago
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