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3 years ago

Ô tô có khối lượng 2500kg

Physics

1 answer:

Galina-37 [17]3 years ago

6 0

Answer:

jsksjsjsjsjsjnznxosbdisnsjjwkjejwjkksoddjndomswsl 2.qowoapoooen kwmwkkwmem make me laugh and get out with you?? edit! thanks so I was just going through. com for a few weeks before the game was so bad at the beginning but it is amazing how many things are the same with the rest. so the way that they want a new one? the best of you for this

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Two 10 kg pucks head straight towards each other with velocities of 10 m/s and -20 m/s. They collide and stick together. Calcula

RUDIKE [14]

The final velocity of the two pucks is -5 m/s

Explanation:

We can solve the problem by using the law of conservation of momentum.

In fact, in absence of external force, the total momentum of the two pucks before and after the collision must be conserved - so we can write:

$m_1 u_1 + m_2 u_2 = (m_1 +m_2)v$

where

$m_1 = m_2 = m = 10 kg$ is the mass of each puck

$u_1 = 10 m/s$ is the initial velocity of the 1st puck

$u_2 = -20 m/s$ is the initial velocity of the 2nd puck

v is the final velocity of the two pucks sticking together

Re-arranging the equation and solving for v, we find:

$mu_1 + mu_2 = (m+m)v\\u_1 + u_2 = 2v\\v=\frac{u_1+u_2}{2}=\frac{10-20}{2}=-5 m/s$

Learn more about momentum:

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3 years ago

What is the mass of a substance that has a density of 5g/ml and the volume of 3ml

Lina20 [59]

Answer:

m= 15g/0.015 kg

Explanation:

density=mass/volume

or, 5g/ml=m/3ml

m= 15 g

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3 years ago

Hydrogen atoms are placed in an external magnetic field. The protons can make transitions between states in which the nuclear sp

gregori [183]

Answer:

Magnetic field = 0.534 T

Explanation:

The solving is on the attach document.

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3 years ago

The sun emits __________ radiation, but it is radiated back off of planetary bodies as __________ radiation.

andriy [413]

The answer to your question: The sun emits shortwave radiation, but it is radiated back off of planetary bodies as longwave radiation. 

Explanation: The sun emits shortwave radiation, wherein it’s extremely hot and is filled with more energy compared to the radiation emitted by planets. This also comes in the form of light. However, once this becomes absorbed by planetary bodies, it turns into longwave radiation. A good example is the earth’s atmosphere emitting energy (longwave radiation), which is energy originally coming from the sun (shortwave radiation).

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mezya [45]

Check the attached file for the answer.

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