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A train is traveling up a 4.4 incline at a speed of 2.45 when the last car breaks free and begins to coast without friction.
A rod 2.8 m long is made of a metal in which the speed of sound is 2300 m/s. If you hit one end of the rod, when would a microphone at the other end first detect a disturbance?
The ball then slides along the table and makes an elastic headon collision with a second ball of equal mass that is initially at rest. Find the velocity of the second ball just after it is struck.
What angle does the ray refracted into the water make with the normal to the surface? Use 1.33 for the index of refraction of water.
A car is traveling 22 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.0 m/s2. How far does the car go before it stops?
a) If the piston has a cross sectional area of 0.0100 m^2 and negligible mass, how high will it rise when the temperature is raised to 250°C? b) What is the pressure of the gas at 250°C?
A package of mass m slides a distance d down a long ramp that is inclined at an angle x below the horizontal. The coefficient of kinetic friction between the package and the ramp is = z. what is wor
The wavelength is 572 nm, the slit separation is 0.1 mm, and the screen is 40 cm away from the slits. What is the linear distance between adjacent maxima on the screen?
Water flows over a dam at the rate of 550 kg/s and falls vertically 80 m before striking the turbine blades. Calculate: (a) the speed of the water just before striking the turbine blades (neglect a
Two point charges are on the y-axis, one of magnitude 3.0 10-9 C at the origin and a second of magnitude 6.0 10-9 C at the point y = 30 cm. Calculate the potential at y = 60 cm.
A 123-cm-long, 5.00 g string oscillates in its n = 2 mode with a frequency of 200 Hz and a maximum amplitude of 4.50 mm. What is the tension in the string?
A spherical capacitor is formed from two concentric, spherical, conducting shells separated by vacuum. The inner sphere has radius 0.38 m and the capacitance is 175 pF. What is the radius of the ou
A rifle that shoots bullet at 460 m/s is to be aimed at a target 45.7m away and levelwith the rifle . how high above the target must the rifle barrel be pointed so that the bullets hits its target?
The electrical potential energy of the charge decreases by 186.302E-19J as it moves. Find the magnitude of the charge on the moving particle.
Assume that the lower leg and the foot together have a combined mass of 4.1 {rm kg}, and that their combined center of gravity is at the center of the lower leg. What is the magnitude of the force
Afterward, three beats per second are heard when the strings vibrate at the same time. What is the new frequency of the string that was tightened?
A soccer player kicks a rock horizontally off a 35.0 m high cliff into a pool of water. If the player hears the sound of the splash 2.84 s later, what was the initial speed given to the rock? Assume
A cable is wrapped around a steel beam so that it will not slip. The ends of the rope make a 90 degree angle. One end of the cable exerts a force of 320 lb, and the other exerts a force of 416 lb. W
Find the required angular speed, omega, of an ultracentrifuge for the radial acceleration of a point 2.20 cm from the axis to equal 4.00×105 g (where g is the acceleration due to gravity). Ex
The speed of sound in body tissue is 1500 m/s. Calculate the speed of the fetal heart wall at the instant this measurement is made.
500 J of work are done to compress the gas while, in the same process, 1200 J of heat energy are transferred from the gas to the environment. Afterward, what is the rms speed of the molecules?
Determine the greatest possible angular speed it can have for the matter at the surface of the star on its equator to be just held in orbit by the gravitational force.
What minimum force directed perpendicularly to the crank handle is required to raise the bucket? The acceleration of gravity is 9.81 m/s2 .
A "gauge 8" jumper cable has a diameter d of 0.326 centimeters. The cable carries a current I of 30.0 amperes. The electric field E in the cable is 0.062 newtons per coulomb. What is the material of
A sculpture is 7.50m tall and has it CG located h=3 m above the center of its base. The base is a square with a side of d=13.6 m. To what angle can be sulpture be tipped before it falls over?