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find the magnitude of the tension in the wire and the magnitudes of the (b) horizontal and (c) vertical components of the force that the wall exerts on the left end of the beam.
If the collision is perfectly inelastic, what is the ball's speed immediately after the collision? What is the maximum compression of the spring for a perfectly inelastic collision?
The mass of Sirius B is 2 X 10^30 kg, nearly the same as the sun's. What is the mass density of this white dwarf star? For comparison, the density of water is 1000-kg/m^3.
Four identical masses of mass 900kg each are placed at the corners of a square whose side lengths are 10cm. what is the magnitude of the net gravitational force on one ofthe masses, due to the
How much energy is used to operate the oven for six hours? (b) At a price of $0.10 per kilowatt X Hour for electricity, what is the cost of operating the oven? Topic: The Transfer of Heat; Conductio
A 53.0-kg person jumps from rest off a 12.0-m-high tower straight down into the water. Neglect air resistance. She comes to rest 3.00 m under the surface of the water. Determine the magnitude of the
A ball rolls down a starting at 4.95 m/s. At the bottom of the slope its speed is 13.4 m/s. What is the height of the slope?
A 71-kg skier is going down a slope oriented 31° above the horizontal. The area of each ski in contact with the snow is 0.13 m2. Determine the pressure that each ski exerts on the snow.
Al moves off with a speed of 8.8 m/sec in one direction and Jo moves off with a speed of 10 m/sec in the other. You can assume friction is negligible. What is Al's mass?
A car of mass M = 1300 kg traveling at 60.0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires. What
If you were moving at 12 m/s and you heard a train whistle at a freqncy of 436 Hz, but the actual sound frequency was 412 Hz, how fast was the train moving?
It is possible to calculate the maximum possible potential (relative to infinity) in air of a metal sphere of 19 cm radius. First, what is the maximum charge you can put on this sphere?
When blue light of wavelength 470 nm falls on a single slit, the first dark bands on either side of center are separated by 65.0 degrees. Determine the width of the slit.
A dentist uses a small mirror of radius 48 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 10 mm from the tooth, what is the magnification of the resulting image?
Three equal point charges, each with charge 1.65X10^-6 , are placed at the vertices of an equilateral triangle whose sides are of length 0.250 . What is the electric potential energy of the system?
A uniform plank of length 4.3m and weight 236N rest horizontally on two supports, with 1.1m of the plank hanging over the right support. To what distance x can person who weighs 450N walk on the ove
A 30nC charged particle and a 50nC charged particle are near each other. There are no other charges nearby. The electric force on the 30nC particle is 4.30×10^-2 N. The 50nC particle is then
A mass m at the end of a spring oscillates with a frequency of 0.83 Hz. When an additional 680 g mass is added to m, the frequency is 0.60 Hz. What is the value of m?
Find the potential at point A. Find the potential at point B. Find the work done by the electric field on a charge of 1 nC that travels from point B to point A.
A 68-kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.11. What would be the magnitude of the acceleration
A ski tow operates on a slope of angle 14.3 degree of length 250 m . The rope moves at a speed of 12.6 km/h and provides power for 53 riders at one time, with an average mass per rider of 68.0 kg.
The cathode and the anode at a rate of 3.50 A. If 95.0% of the electrons reach the anode,(a) How many electrons reach the anode during a period of 15.0 s?
A car is traveling 96 km/h and is 130 m behind a truck traveling 75 km/h. How long will it take the car to reach the truck?
A hunter 1.7 meters tall (that is to the eye level) directly aims at a target which is on the same level. By how much will he miss the target?
A diver 60 m deep in 10^circ{rm C} fresh water exhales a 1.5 {rm cm} diameter bubble.What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20^circ{