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A vertical spring of k=115 N/m supports a mass of 75g. The mass oscillates in a tube of liquid. IF the mass is initially given an amplitude of 5.0cm, the mass is observed to have an amplitude of 2.0
(a) Show that the oscillation is simple harmonic. (b) Find the period of the oscillation. Neglect the fact that the water has a damping effect on the motion.
A beaker of water rests on an electronic balance that reads 999.0 g. A 2.2 cm-diameter solid copper ball attached to a string is submerged in the water, but does not touch the bottom. Tension in the
A tennis ball is thrown from ground level with velocity v0 directed 30 degrees above the horizontal. If it takes the ball 1.0s to reach the top of its trajectory, what is the magnitude of the initia
The bulk modulus for bone is about 1.5*10^10Pa. If a diver-in-training is put into a pressurized suit, by how much would the pressure have to be raised (in atmospheres) above atmospheric pressure to
Two point charges are seperated by a distance R and they repel each other with a force F. If their seperation is reduced to 0.25 times the original value, what is the magnitude of the force of replu
What is the max force that can be applied to the tibia, or shin bone, at its narrowest point whose minimum cross-section area is 3.0cm^2?
You step onto a hot beach with your bare feet. A nerve impulse, generated in your foot, travels through your nervous system at an average speed of 114 m/s. How much time does it take for the impulse
A child sitting 9.3 m from a center of the merry-go-round moves with a speed of 1.30 m/s. (a) Calculate the centripetal acceleration of the child towards the center or away from the center
A 0.39 kg piece of putty is dropped from a height of 2.7 m above a flat surface. When it hits the surface, the putty comes to rest in 0.33 s. What is the average force exerted on the putty by the su
A spherical balloon expands when it is taken from the cold outdoors to the inside of a warm house. If the surface area increases by 20%, by what percent does the radius of the balloon change?
Neptunium has a density of 19.5 . What would be the radius of a sphere made of this material that has a critical mass? (Recall that density is mass divided by volume.)
How many electrons must be removed from each of two 5.0-kg. copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitional attraction between them?
A spherical shell has inner radius Rin and outer radius Rout. The shell contains total charge Q, uniformly distributed. The interior of the shell is empty of charge and matter. (a) Find the electric
Three test charges, each with a charge of +1x10-6 C, are located at the points of an equilateral triangle. If the legs of the triangle are 10 cm long, what is the total force acting on each charge?
An advertisement claims that a particular automobile can "stop on a dime". What net force would actually be necessary to stop an automobile of mass 900 kg traveling initially at a speed of 46.0 km/h
The intensity (in W/m2) of one sound is 6.04 times as great as the intensity of another sound. Relative to the quieter sound, what is the intensity level ß of the louder sound?
A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is required to hold a 7.5 cm-diameter hose del
Why must a water skier moving with constant velocity lean backwards? What determines how far back she must lean? Draw a free-body diagram for the water skier to justify your answers.
A light-year is the distance light (speed = 2.998 108 m/s) travels in one year. (a) How many meters are there in 16.0 light-years?
An air-filled parallel-plate capacitor has a capacitance of 1.4 pF. The separation of the plates is doubled and wax is inserted between them. The new capacitance is 2.4 pF. Find the dielectric cons
A charged isolated metal sphere of diameter 12 cm has a potential of 8500 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of the sphere.
A 1000kg cart is rolling to the right at 5.0m/s. A 70kg man is standing on the right of the cart. What is the speed of the cart if the man starts running to the left with a speed of 10m/s relative t
What was the initial negative charge on one of the spheres, and what was the initial positive charge on the other?
A 150g block is launched up a 50.0 degree ramp using a spring compressed a distance of 5.0cm from its equilibrium position. The spring requires a force of 16.5N to compress it 15cm. If the coefficie