Question

The following diagram

Answer 1

Since this is frictionless, the only factor affecting kinetic energy is height. The lower it goes, the faster it will be (with lower potential energy). The higher it goes, the slower it will be (with higher potential energy)

Answer 2

So that makes it easy. What two spots would have the same kinetic energy then?

Answer 3

Yep you got it

Answer 4

I love how much useless information they give you in this one to confuse you

Answer 5

wow, thanks. Just a heads up- i have 3 others that i need help with, would you be up for it?? Only three. I really appreciate your patience with me and all hah:-) and yeah i know its weird

Answer 6

I can help if it's along these lines. I am a senior physics major after all

Answer 7

oh wow! thats really cool!

Answer 8

thanks btw!

Answer 9

So with this one you just have a different starting point. You're given the specific heat, and you're told how much the temperature changes along with the total grams. How many joules will make that happen?

Answer 10

Literally work backwards on this one

Answer 11

fan me

Answer 12

im sorry

Answer 13

A

Answer 14

Remember what specific heat means. That's the number of joules required to change the temperature by one degree per gram. This substance has 2 grams, so right off the bat you can say that it will take 400 joules to raise the temperature of this substance by one degree. But wait now you want to find what it will take to raise it by 20 degrees. So just do 20 times that

Answer 15

b

Answer 16

c

Answer 17

or

Answer 18

d

Answer 19

20 times what again?

Answer 20

@nuttyliaczar

Answer 21

The 400 joules per 2 grams we established

Answer 22

ok and i get 800

Answer 23

Because specific heat is 200 joules per gram, so per 2 grams it's 400. And that's just for 1 degree, we need 20 degrees. So 400*20

Answer 24

400*20 is not 800

Answer 25

400*20 is not 800

Answer 26

Yep 8000 is right. Makes sense?