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Calculate the density of sulfur hexafluoride gas at 723 torr and 27°C
A 82 kg water skier floating in a lake is pulled from rest to a speed of 13 m/s in a distance of 25 m. What is the net force exerted on the skier, assuming his acceleration is constant?
Explain what will happen to the precision of the orders and rate constant (higher/lower), and the difference in the activation energies if:
A grocery cart is pushed along an aisle by a shopper who exerts a constant horizontal force of . The acceleration of gravity is . If all frictional forces are neglected and the cart starts from rest
What is the molar concentration of a 1 Liter solution of HCl that has 65 grams of HCl in it?
What is the pH of the solution after the addition of 5.00 mL of 0.10M NaOH to 50.0 mL of buffer solution? Ka of CH3CH2COOH = 1.4 10-5.
Calculate its average velocity for the entire trip, using "away from the trainer" as the positive direction.
The truck is to curve off the road, jump across a gully, and land on the other side 2.96 m below and 10 m away. What is the minimum centripetal acceleration the truck must have going around the circ
A 1.20x10^2 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.400. What should be the ma
A 420 N uniform rectangular sign 4.00 m wide and 3.00 m high is suspended from a horizontal, 6.00-m-long, uniform, 90-N rod as indicated in the figure below. The left end the rod is supported by a h
They attach ropes and one pulls with a force of 576 N at an angle of 31? with respect to the direction in which the truck is headed, while the other car pulls with a force of 872 N at an angle of 24
In a particular region of the earth's atmosphere, the electric field above the earth's surface has been measured to be 155 N/C downward at an altitude of 300 m and 172 N/C downward at an altitude of
A 779-kg car stopped at an intersection is rear-ended by a 1820-kg truck moving with a speed of 15.0 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately el
How much ice must melt in order to cool the hot water down to this temperature?
A bucket filled with water has a mass of 23 kg and is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. What torque does the weight of water and buck
A 40.0 rock slides on a rough horizontal surface at 6.00 and eventually stops due to friction. The coefficient of kinetic friction between the rock and the surface is 0.300. What average thermal pow
The throw and catch each occur 1m above the ground. what minimum speed will allow the ball to clear the roof? At what angle should the ball be tossed. (in picture at roof starts at 3m and the angle
An object is placed 20 cm to the left of a converging lens with a focal length of 8 cm. A second converging lens of focal lenght 12 cm is placed to the right of the first lens. If the final image of
At times during a normal walking motion, nearly the entire body weight acts perpendicular to the surface of such a heel. Find the pressure that is applied to the floor under the heel because of the
66 kg diver steps off a 13 m tower and drops from rest straight down into the water. If he comes to rest 4.8 m beneath the surface, determine the average resistance force exerted on him by the water
A 293 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction
If you place the box on a dolly of mass 4.7 and with coefficient of rolling friction 2.0×10-2, what horizontal acceleration would that 154 force provide?
The loss of heat to the external environment is negligible. When equilibrium is established, the temperature is 30.0°C. What is the specific heat capacity of the specimen?
A hammer is hanging by a light rope from the ceiling of a bus. The ceiling of the bus is parallel to the roadway. The bus is traveling in a straight line on a horizontal street. You observe that the