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Two balls are moving in the same direction. Ball A has half the mass of ball B, and is moving at twice its speed. Which ball has greater kinetic energy
A 101 g ball is tied to a string. It is pulled to an angle of 5.20 degrees and released to swing as a pendulum. How long is the string
FA 2.0%u03BCC charge and a 2.9%u03BCC charge are 11.0cm apart. Find a point where the electric field is zero
You are required to build a 12 picofarad capacitor. If the plates can be only 2mm apart and circular, what is the radius of each of the plates
A particle is moving around in a circle and its position is given in polar coordinates as x = Rcos?, and y = Rsin?, derive the equation for centripetal acceleration
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water
An archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m. The arrow weighs 50 g. What is the velocity of the arrow immediately after release
a 4.0 kilogram cart moving to the right and a 6.0 kilogram cart moving to the left on a horizontal frictionless surface. find the magnitude of the total momentum of the two-cart system
A 2.0-kilogram cart moving due east at 6.0 meters per second collides with a 3.0-kilogram cart moving due west. What was the initial speed of the 3.0-kilogram cart
A student applies a 20.-newton force to move a crate at a constant speed of 4.0 meters per second across a rough floor
A net force of 25 newtons is applied horizontally to a 10. kilogram block resting on a table. What is the magnitude of the acceleration of the block
A 10-A current flows for two minutes. How much charge has passed through this circuit
A pitcher throws horizontally a fast ball at 146 km/h toward home plate, which is 18 m away. find how far the ball drops because of gravity by the time it reaches home plate
A step-down transformer is used for recharging the batteries of portable devices. find the rms output voltage of the transformer
A simple pendulum of length of 0.350 m starts from rest at a maximum displacement of 10 degrees from the equilibrium position. When will the pendulum return to its starting position
Wire 1 and 2 are made of the same metal. What is the ratio p2/p1 of the resistivities of the two wires
An electron of kinetic energy 35 keV moves in a circular orbit perpendicular to a magnetic field of 0.390 T. Find the radius of the orbit
During a recent thunderstorm the wind was blowing past your roof at 40 m/s. Assuming that the density of air is 1.20 kg/m^3, What is the net force experienced by the roof
A passenger car traveling down a rough road bounces up and down at 1.2Hz with a maximum vertical acceleration of 0.25m/s2, What is the maximum speed of the oscillation
A uniform electric field exists in a region between two oppositely charged plates. What is the magnitude of the electric field
A point charge -Q is at the center of a spherical conducting shell of inner radius R1 and outer radius R2, What is the charge on the inner surface of the shell
Consider a spherical Gaussian surface which surrounds two electric charges (+Q), What is the net electric flux through the Gaussian surface
Suppose for a brief moment the gas molecules hitting a wall stuck to the wall instead of bouncing off the wall. How would the pressure on the wall be affected
A 250-g object attched to a spring oscillates on a frictionless table with a frequency of 4 Hz and an amplitude of 20 cm. Calculate the maximum potential energy of the system
A metal sphere of mass M and radius R is charged up so that its surface is at an electric potential V. What is the electric potential at the center of the sphere