Recent content by kalisious

okay, so now I have the mass, but how do I calculate the volume to use when solving for the final density? when I set this up as density = mass/volume I end up with density being equal to the mass and I KNOW that is not correct!

so should I set it up as P1V1/T1 = P2V2/T2?

Wouldn't setting it up this way also cancel out pressure along with volume? That would just give me the equation density = mass/volume and then if volume cancels I'm left with density = mass?

Homework Statement The density of helium gas at T= 0 degrees Celsius is 0.179 kg/m^3. The temperature is then raised to 100 degrees Celsius, but pressure is kept constant Assuming the helium gas is an ideal gas, calculate the new density of the gas. Homework Equations PV = nRT...

Homework Statement An ideal fluid with the density of 0.85 x 103 flows at 7.0 m/s through a level pipe with a radius of 0.50 cm. The pressure in the fluid is 1.4 x 105 N/m3. This pipe connects to a second level pipe with radius of 1.5 cm. Find the speed of flow in the second pipe...

Homework Statement A cube of 15 cm is floating at the surface between water and oil. The oil has a density of 810 kg/m3. If the cube floats so that it is 52% in water and 48% in the oil, what is the mass of the cube and what is the buoyant force on the cube? Homework Equations...

U-shaped tube-- how far does the mercury rise when water is poured into one side? Homework Statement A U-shaped tube containing mercury is open to the air on both ends. Water is poured into one arm until the water column is 15.0 cm deep. How far upward from the initial position does the...

I understand the equation for conservation of momentum, but how do I go about finding the velocity as you mentioned?

I am not sure what equation is used to find the mass though?

Homework Statement Imagine you are sent in a satellite. a) How far above the surface of the Earth would you lose 1/2 of your weight? b) To maintain the satellite orbiting around the Earth at that distance, what will be the velocity of the satellite? c) Imagine you have taken a weighing...

Homework Statement In a circular flat track of radius 50m, what is the maximum speed car can go without sliding? Assume the coefficient of static friction between the car tire and the road is 0.4. Homework Equations Unsure of what equations to use. The Attempt at a Solution Unsure...

Homework Statement Consider a frictionless track. Imagine point A to B is one quarter of a circle; point B to C is a horizontal flat plane; point C to D is also one quarter of a circle. The block m1 is released from A. It makes a head-on elastic collision at B with m2 (that is initially...

Homework Statement While running in a cross country meet, a member of the team dissipates about 0.35J of mechanical energy per step per kg of her body mass. If she develops a power of 75W during the race and runs at a speed of 5m/s, find her mass. PS: Consider one [of her] running steps to...