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3 years ago

Somebody please help I need exuse to not go to pe because I injured my self anybody know what to say

Physics

1 answer:

algol133 years ago

3 0

Answer:

Say you feel like you twisted ur ankle or can move your foot or something in that category

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I feel like I’ve been on this physics exam forever… please help . NO LINKS.

sesenic [268]

Explanation:

my guess is A

emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.

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3 years ago

A wave transfers _____ from the source outward in the direction of wave motion.

DerKrebs [107]

A wave transfers energy from the source outward in the direction of wave motion.

To add, in physics, a wave is an oscillation accompanied by a transfer of energy that travels through a medium (space or mass). Frequency refers to the addition of time.

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3 years ago

A 62.0 kg water skier at rest jumps from the dock into a 775 kg boat at rest on the east side of the dock. If the velocity of th

Dominik [7]

Answer:

v = 0.33 m/s

Explanation:

The final velocity of the skier and boat can be calculated by conservation of the lineal momentum:

$m_{1}v_{1i} + m_{2}v_{2i} = m_{1}v_{1f} + m_{2}v_{2f}$

Where:

m1: is the mass of the water skier = 62.0 kg

m2: is the mass of the boat = 775 kg

v1i: is the initial velocity of the water skier = 4.50 m/s

v1f: is the final velocity of the water skier = ?

v2i: is the initial velocity of the boat = 0

v2f: is the final velocity of the boat = ?

Since the final velocity of the skier is the same that the final velocity of the boat, we have:

$m_{1}v_{1i} + m_{2}v_{2i} = m_{1}v_{f} + m_{2}v_{f}$

$m_{1}v_{1i} + 0 = v_{f}(m_{1} + m_{2})$

$v_{f} = \frac{62.0 kg*4.50 m/s}{(62.0 kg + 775 kg)}$

$v_{f} = 0.33 m/s$

Therefore, the final velocity of the skier and boat is 0.33 m/s.

I hope it helps you!

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3 years ago

Taro stated that when someone hits a golf ball with a club, the amount of energy the ball has changes, the amount of energy that

melamori03 [73]

The mistake here is that the total energy of the system does not change - generally, the total amount of energy in a system never changes unless the energy enters or leaves the system somehow (for example, if you see the Earth alone as a system, then energy from the sun enters the system and some energy is lost to space in the form of heat).

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3 years ago

What is the major source of energy on Earth? Group of answer choices a.photosynthesis b.fossil fuels c.EM waves from the sun d.

olya-2409 [2.1K]

Answer:

Em waves from the sun d

Explanation:

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3 years ago

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