PHYSICS MIDDLE SCHOOL

to remove a tight-fitting jar, megan runs the lid under hot water. What happends to the jar lid when its temperature increases?

Answers

Answer 1
Answer: It expands due to heat and makes it easier to open the jar.
Answer 2
Answer:

Final answer:

Running the lid of a tight-fitting jar under hot water causes it to expand due to thermal expansion, which makes it easier to remove from the jar.

Explanation:

When the lid of a tight-fitting jar is run under hot water, it undergoes thermal expansion due to the increase in temperature. The expansion of the lid causes it to slightly loosen, making it easier to remove from the jar. This happens because metals have higher coefficients of expansion than glass, so the lid expands more than the jar itself.

Learn more about Thermal expansion here:

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If launched at the right speed, what could eventually happen to objects launched from Newton's theoretical cannon on the top of a mountain?

Answers

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A kangaroo hops at an angle of 25° to the horizontal with a velocity of 20 m/s. What is the vertical component of the velocity? A. 8.5 m/s B. 12.5 m/s C. 18 m/s D. 20 m/s

Answers

Answer:

A. 8.5 m/s

Explanation:

vᵧ = v sin θ

vᵧ = (20 m/s) (sin 25°)

vᵧ = 8.5 m/s

I took the test and got A) 8.5 correct

What does basketballs have inside of it

Answers

Hi there!

Great question!

Basketballs have air inside them. A special pump is used to insert the air. That's why you can lift the basketballs off the ground easily. If it was a solid, though, you'd hardly be able to lift the ball up! Basketballs can float, too, because anything with air inside can float. If it were solid, it would sink in the water easily.

Hope this helps! :D

If two automobiles have the same velocity, do they have the same acceleration?

Answers

Not at all.

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What do tendons connect skeletal muscles to?​

Answers

Answer:

Tendons connect muscle to bone. These tough, yet flexible, bands of fibrous tissue attach the skeletal muscles to the bones they move. Essentially, tendons enable you to move; think of them as intermediaries between muscles and bones.

Hope this helps! (:

Answer:

Explanation:Tendons connect muscle to bone. These tough, yet flexible, bands of fibrous tissue attach the skeletal muscles to the bones they move. Essentially, tendons enable you to move; think of them as intermediaries between muscles and bones.

The upward force on an object falling through the air is?

Answers

The thing that pushes the object up while it is falling is air. This force is known as "air resistance". 
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