PHYSICS MIDDLE SCHOOL

A basketball has been left out in the cold. The next day you find that it has become soft. What do you do to get it back to shape and why?a) Leave it alone to warm up
b) Pump it up a little
c) Get a new basketball

Answers

Answer 1
Answer: All three answers would adequately solve your "flat basketball" problem, but the answer your teacher is probably looking for is a). When the air inside the basketball cooled off, the particles came closer together, causing the ball to deflate. If the air inside the ball was warmed back up, the particles would spread out more (the air would expand) and the ball would inflate again. 
Hope that helps!!
Answer 2
Answer: The cold made the particles clump to together so the answer could be a or b

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Need help with exercises 3,4,5

Will give brainliest!!!

Answers

I pretty sure that 3 is b and 4 is A and 5 I need a full picture

In which direction does a bag at rest move when a force of 20 newtons is applied from the right? A. in the direction of the applied force B. in the direction opposite of the direction of the applied force C. perpendicular to the direction of the applied force D. in a circular motion

Answers

The correct answer is A. In the direction of applied force. This is because acceleration occurs n the direction of applied force according to Newtons second law of motion which states that the acceleration of a body is directly proportional to the applied force and takes place in the direction of force.

Answer:

A. in the direction of the applied force

Explanation:

As per newton's first law of motion we know that object will not change in its state of motion till some external force is applied on it

So here we can say that when force is applied on an stationary object then the stationary object will move in the direction of applied force so change in the state of motion from rest state to moving state will occur and the direction of motion must be in applied force direction

So correct answer will be

A. in the direction of the applied force

two objects were lifted by a machine. one object had a mass of 2 kilograms and was lifted at the speed of 2 m/s. the other had a mass of 4 kilograms and was lifted at a rate of 3 m/s. which object had more kinetic energy while it was being lifted?"

Answers

to find the kinetic energy KE=1/2 × mass × velocity ^2
for object 1 ke= 1/2(2)(2^2)=4 J
for object 2 ke= 1/2(4)(3^2)=18J
meaning object 2 as more kinetic energy

What is the weight of a cat that has a mass of 7.02kg?73.4N
72.5N
68.8N
70.2N

Answers

Answer:

The last one 70.2N

Explanation:

Take the decimal and move it over one space

Which is the SI base unit for mass?

A. cg

B. kg

C. g

D. mg

I think its D 

Answers

It is kilograms in mass.  (B) 

Nice try though :)

The answer that I am seeing is that its kg because it means kilograms.

What type of change occurs when ice absorbs energy and melts? a. change in weight
b. change in mass
c. endothermic change
d. exothermic change

Answers

The answer is C.endothermic change.

♡♡Hope I helped!!! :)♡♡
endothermic change because there is no change in weight or mass. It is not exothermic because exothermic change  is a chemical or physical change that releases heat.
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