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Arada [10]
4 years ago
15

Choose all the answers that apply. Which of the following forces require physical contact? tension, air resistance, friction, ma

gnetic force, applied force
Physics
1 answer:
svet-max [94.6K]4 years ago
8 0

Answer:

I belive it would be friction applied force and tension

Explanation:

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Scientists have found that the most destructive and deadly tornadoes occur from rotating thunderstorms called
Julli [10]

Answer:

Supercells

Explanation:

supercells are rotating thunderstorms that has a well-defined radar circulation called a mesocyclone. They can sometimes produce destructive hail, severe winds, frequent lightning, and flash floods.

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4 years ago
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What is the instantaneous velocity of the hummingbird at t=1s?
Liono4ka [1.6K]

The distance - time graph of the humming bird is missing, so i have attached it.

Answer:

Instantaneous velocity = 0.5 m/s

Explanation:

From the attached graph, at time t = 1 s, the corresponding distance is 0.5 m.

Instantaneous velocity is the velocity at that point.

Thus;

Instantaneous velocity = 0.5/1

Instantaneous velocity = 0.5 m/s

3 0
3 years ago
Which of the following gives an atom's mass number? Question 1 options: a.number of neutrons b.number of neutrons + number of pr
jeka57 [31]
The atom´s mass number is the "number of neutrons and number of protons (option B) in an atomic nucleus. It might determine the atomic mass os atoms. Because neutrons and protons are baryons, the mass number A is identical to mass number B as of the nucleus, atom or iron. 
3 0
3 years ago
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The weightlifter's internal store of energy decreased when he lifted the bar.
Mumz [18]

Answer:

The energy returns to the weightlifter's muscles, where it is dissipated as heat.

Explanation:

The energy returns to the weightlifter's muscles, where it is dissipated as heat. As long as the weightlifter controls the weight's descent, their muscles are acting as an overdamped shock absorber, as if the weight were sitting on a piston containing very thick fluid, slowly compressing it downward (and slightly heating up the fluid in the process). Since muscles are complicated biological systems and not simple pistons, they require metabolic energy to maintain tension throughout the controlled descent, so the weightlifter feels like they're putting energy into the weight, even though the weight's gravitational potential energy is being converted into heat within the lifter's muscles.

5 0
3 years ago
Describe three forces that are acting in the situation described below
motikmotik

Carries a box: tension in worker's arms

Nails fall: force of gravity

Magnet: magnetic force.

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3 years ago
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