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The 4 kg puck has a velocity of 3.00i m/s at one instant. eigth second later its velocity is (8i+10j)m/s. assuming the rocket engine exerts a constant horizontal force, find the components of the fo
A friend throws Olaf a ball of mass 0.400 that is traveling horizontally at 10.2 . Olaf's mass is 65.5 .A. If Olaf catches the ball, with what speed do Olaf and the ball move afterward?
A 310-g air track cart is traveling at 1.25 m/s and a 260-g cart traveling in the opposite direction at 1.33 m/s. What is the speed of the center of mass of the two carts?
A 60.0-kg man stands at one end of a 20.0-kg uniform 10.0-m long board. How far from the man is the center of mass of the man-board system?
After the collision, the 80.0-g puck moves in a direction that makes an angle of 45.0° with the original direction of motion and the 100-g puck moves at an angle of 12.0° in the opposite dir
Two ice skaters push off against one another starting from a stationary position. The 45-kg skater acquires a speed of 0.375 m/s. What speed does the 60-kg skater acquire?
Consider a 1.0 kW fuel-cell assembly operating at 50% efficiency. (a) How many litres of water does it produce per hour? (b) If its fuel is natural gas (CH4), what fraction of a cubic meter does it
The final velocity of train car B is 2.0 m/s traveling East. What is the final velocity of train car A? Or does it come to complete stop after the collision?
Calculate the speed of a proton that is accelerated from rest through an electric potential difference of 158 V.
When you last stopped, you noticed that the snow was coming down vertically, but it is passing the windows of the moving car at an angle of 30 degrees to the horizontal. Estimate the speed of the sn
Suppose that you take another 0.4 s to realize your danger and begin braking. If you too brake at 5 m/s2, what is your speed when you hit the police car?
(a) What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided?
(a) Find the speed of the block just as it leaves the spring. (b) Find the total distance the block will slide. (c) Describe all of the energy transformations and/or transfers that occur during this
How many grams of acrylonitrile (C3H3N) would be produced if we began with 15 grams of propene(C3H6), 5 grams of ammonia(NH3), and 10 grams of oxygen?
A mixture of ordinary hydrogen atom and tritium, a hydrogen isotope whose nucleus is approximately 3 times more massive than ordinary hydrogen, is excited and spectrum is observed . How far in wavel
Calculate the density of fluorine gas at a pressure of225KPa and temperature of 115 degrees celsuis (in g/L)7) 4.50 x 10^3 mL of CH4 at STP is equivalent to how many grams?
The gas first expands isobarically until the volume doubles. Then it expands adiabatically until the temperature returns to its initial value. Assume that the gas may be treated as an ideal gas with
Nitrogen gas (N2) reacts with hydrogen gas(H2) to form ammonia (NH3) at 200°C in aclosed container. 1.41 atm of nitrogen gas is mixed with 2.32 atm of hydrogen gas. At equilibrium the total pres
You connect both ends of a copper wire, with a total resistance of 0.10 O, to the terminals of a galvanometer. The galvanometer has a resistance of 845 O. You then move a 10.0-cm segment of the wire
An electron and a positron can rotate about their center of mass as if they were a dumbbell connected by a massless rod. What is the orbital frequency for an electron and a positron 1.20 nm apart?
If the sail material has a density of 600.0 kg/m3, what is the maximum thickness of the sail for which the force due to radiation pressure exceeds the gravitational force on the sail?
(a) At a point on the rope a distance r from the end that is held, what is the tension F? (b) What is the speed of transverse waves at the is point? (c) Find the time required for a transverse wave
A 0.21 m3 drum contains 100L of a mixture of several degreasing solvents in water. The concentraton of trichloroethylen in the headspace ( gas phase) above the water was measured to be 0.00301
The bullet has a mass of 3.00g and the rod rotates around its center. Right after the collision its has ω = 10.0 rad/s. What was the speed of the bullet before it hit the rod?
The nuclide hafnium-171 has a half-life of 12.0 hours. What amount of a sample of this nuclide that originally had a mass of 75 mg remains after 3 days?