Recent content by 12boone

H is enthalpy. I just have to say whether or not the values of these will increase decrease or if they are zero in each case. I am really only concerned about the last two.

Homework Statement I have two problems. What is Delta U, Delta H, q, and w for the Reversible heating of an ideal gas at constant P. Also, what are these values for the Reversible cooling of an ideal gas at constant V. Homework Equations The Attempt at a Solution For the...

Homework Statement You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to gravity is 3.71 meters per second per second. The pressure at the surface of the water will be 145 kPa , and the depth of the water will be 14.2m...

I have no idea how to do this part. i keep getting two variables no matter what i try to manipulate. what is the eq for con of energy. 1/2 mv^2 +mgh=1/2mv^2+mgh?

i mean 2.42=Va'+1/6Vb'

if i use that i get 2.42=Va'+1/6Va'b i have two variables

i used mgh=1/2mv^2 to get the speed of the big block which is 2.42 m/s I plugged it in like this 9.8(.30m)=1/2v^2 then used algebra to solve. then i did the same thing for the final velocity of the lil block so i did 9.8(.90)=1/2v^2 and i found it was 4.2 m/s. then i found the va' by doing...

Homework Statement In a physics lab, a cube slides down a frictionless incline as shown in the figure (Intro 1 figure) , and elastically strikes another cube at the bottom that is only 1/6 its mass. The picture is located in the attachement. If the incline is 30 cm high and the table is 90...

wow thank you!

I multiplied .240kg(540m/s) then divided that by (.240+1.2).

ok i did that and it is still wrong. i did .5(.240+1.20)(90)^2=(.240+1.20)(9.80)h i put the left side in the calc. and got 5832=(.240+1.20)(9.80)h then divided the right numbers by the left and my answer is 413.26m which is wrong according to mastering physics.

Homework Statement A bullet is fired vertically into a 1.20 kg block of wood at rest directly above it. If the bullet has a mass of 24.0g and a speed of 540 m/s , how high will the block rise after the bullet becomes embedded in it? Homework Equations 1/2mv^2+mgh=1/2mvf^2+mgh mv=mvf...

Homework Statement A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the magnitude of the average collision force is correct? The truck experiences the greater average force. >>> The small car experiences the greater average...

Homework Statement A 23 g bullet traveling 235 m/s penetrates a 3.8 kg block of wood and emerges cleanly at 195 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges? Homework Equations (1) mv= (m+M)v' momentum...

what I am looking for is the coefficient of friction.