# chemistry

posted by .

I got E) for the first and couldn't figure out the other one. Can any one verify the first and help with the second??

In which of the following processes is there a decrease in the potential energy of the substances involved?
A) a coil spring is compressed
B) two particles of opposite charge are separated
C) photosynthesis produces glucose from carbon dioxide and water
D) liquid water evaporates to form water vapor
E) methane gas burns in oxygen to form carbon dioxide and water

The speed of light is 3.0 x 108 m/s. How many milliseconds does it take for a light signal from earth to reach and return from a satellite that is in orbit 30 miles above the earth? (1 millisecond = 10-3 seconds)
A) 320 milliseconds
B) 16 milliseconds
C) 32 milliseconds
D) 0.32 milliseconds
E) 0.16 milliseconds

## Similar Questions

thanks,can you help me with this one: xy-3x-8y+24 I know you have to go, but you should be able to figure these out by now. Take out x from the first 2 and 8 from the second 2: x(y-3)-8(y-3) (x-8)(y-3) ac-bc+ad-bd *I seriously only …
2. ### Math

i need help finding the slope of the line that passes through each pair of poinst. 1. (1,-3),(4,3) 2.(5,0), (-2,1) Divide (y2 - y1) by (x2 - x1). For (1), this would be 6/3 = ?
3. ### math

Can someone help me figure this out. The difference of two numbers is 80. The second is 8 less than 5 times the first. What are the two numbers?
4. ### general science

2 waves are traveling through a container of nitrogen gas. Amplitude of the first wave is 0.3 cm, and the second 0.9 cm. What is true about the two waves?
5. ### chemistry

I got E) for the first and couldn't figure out the other one. Can any one verify the first and help with the second?
6. ### Chemistry

Name the complexes: [V(ox)(Cl)3]- [Cr(F)3(I)(H2O)2] Write the formula for each of the following coordination compounds. Diamminetetrahydroxochromte (II) ion Bisethylenediaminediiodomanganese (IV) ion I think the name for the first …
7. ### Physics

Problem 1- In one day, a 85 kg mountain climber ascends from the 1440 m level on a vertical cliff to the top at 2360 m . The next day, she descends from the top to the base of the cliff, which is at an elevation of 1310 m . a) What …
8. ### Computer Science

How would I put this into one program? These are the directions: Write a method that takes two parameters. If the first parameter is equal to second parameter. Multiply both and print result. If the first parameter is less than the
9. ### Algebra

Eliminate the complex fractions (5/8)/(-2/3) (x^-1+y^-1)/(x+y) (1/x+1/y)/(x+y) (xy/xy/) I was trying to find the lcd for the first one but couldn't figure it out. For the second one, I got to as far as getting the reciprocal of the …
10. ### math

A) How many of the three digit numbers can be made from all of the digits, 1,3 and 7, and used only one each,are prime?

More Similar Questions