Recent content by Confused_07

The equation doesn't give me the final temp of the water, so how do you set up the equations for the final temps? I'm confuse because my textbook only gives me one sample problem in it and that one gives you the final temp of the water, so the equation is simple. Sorry if I am not seeing it...

Help... anyone?

Homework Statement A .20kg lead shot is heated to 90 degrees C and dropped into an ideal calorimeter containing .50kg of water initially at 20 degrees C. What is the final equilibrium temperance of the lead shot? Specific heat capacity of lead is 128 J/(kg*C), and water is 4186 J/(kg*C)...

Homework Statement 80 kg astronaut carrying a 20kg tool kit is initially drifting toward a stationary space shuttle with a speed of 2 m/s. If sh throws the tool ki toward the shuttle with a speed of 6 m/s as seen from the shuttle, her final speed is? Homework Equations If it is seen from...

Why I typed 9 I don't know... :D, I meant 12...

Ah... Lf = Lo [I(final) * w(final)] = [I(initial) * w(initial)] w(final) = [I(initial) * w(initial)] / I(final) *If I(initial) = 2, and, I(initial) * 50%= 1, then her final speed is 12 rad/s.

Homework Statement A 60kg skater begins a spin with an angular speed of 6 rad/s. By changing the position of her arms, the skater decreases her moment of intertia by 50%. What is the skater's final angular speed? Homework Equations I understand that I=m*(r^2), so if the radius decreases...

Homework Statement Starting from rest, a particle confined to move along a straight line is accelerated at a rate of 5 m/s^2. Homework Equations Does this mean that each second the particle's speed increases by 5m/s^2, or does it's speed stay at 5 m/s^2 and travels only 5 meters per second?