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2 years ago

30 points, brainiest, high school physics problem, please help with explanations.

Physics

1 answer:

Ymorist [56]2 years ago

4 0

Answer:

I think the answer is C too

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PLS HELPPPP WILL AWARD BRAINLIEST AND POINTS

Yuri [45]

Answer:

Here

Length (l) = 6 m

height (h) = 3 m

Load(L) = 500 N

Effort (E) = ?

we know the principal that

E * l = L * h

6 E = 500 * 3

6E = 1500

E = 250

therefore 250 N work is done on the barrel.

7 0

3 years ago

Steam (water vapor) at 100 degrees Celsius is added to a thermally insulated container with 200 kg of ice at zero degrees Celsiu

Ivan

Answer:

m = 359.24 kg

Explanation:

given data:

mass of ice = 200 kg

latent heat of steam = 2260 kJ/kg

latent heat of ice = 334 kJ/kg

from conservatioon of energy principle we know that

heat lost by steam will be equal to heat gained by ice

therefore we have

( ml + mcdt) = (ml + mcdt)

m*2.26*10^6 + m*4186*(100-30) = 200*3.33 *10^6 + 2000*4186 *30

m = 359.24 kg

8 0

2 years ago

A 5.8 kg bowling ball is rolling down the lane with a velocity of 8.1 m/s . Calculate the momentum of the bowling ball. Provide

zheka24 [161]

Answer:

46.98 kg m/s

Explanation:

P = mv

P = 5.8*8.1 = 46.98 kg m/s

8 0

2 years ago

A student wished to add a new experiment to Chapter 2 by investigating whether the mass of water changes when it is heated. The

Valentin [98]

Answer:

mass conservation is valid for all closed system where the mass will remain in the system always

Explanation:

Conservation of mass is applicable everywhere in classical physics

Here we can also apply mass conservation as we know that the initially the beaker and its water content is having total mass of 109.44 g

$m_1 = 109.44 g$

now when we heated it to higher temperature then its total mass will be lesser than the initial mass this is because some of the water may evaporate from the system.

Here if we repeat the same experiment with closed boundary then we can see that total mass will be conserved

So here mass conservation is valid for all closed system where the mass will remain in the system always

7 0

3 years ago

What type of wave is shown below?

Elena-2011 [213]

Answer:

B. Transverse wave.

Explanation:

Because it has troughs and crests.

5 0

2 years ago