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Consider a rocket-powered hockey puck, and assume the rocket produces a constant acceleration when the rocket is on. Determine the impact location and the impact speed of the puck
Two boxes, A and B, are connected by a (mass-less) cord and are resting on a smooth (frictionless) table. Find the tension force in the cord connecting the two boxes
The equation of a transverse wave on a string is y = (6.1 mm) sin[(30 m-1)x + (300 s-1)t] The tension in the string is 42 N. Find the linear density of this string
A parallel-plate air capacitor has a capacitance of 400pF and a charge of magnitude 0.250microC on each plate. The plates are 0.500mm apart. What is the surface charge density on each plate
When a battery is connected to a 100.0-? resistor, the current is 4.00 A. When the same battery is connected to a 400.0-? Find the emf supplied by the battery
A small box of mass m1 is sitting on a board of mass m2 and length L . The board rests on a frictionless horizontal surface
Two cars drive on a straight highway. At time , car 1 passes mile marker 0 traveling due east with a speed of 17.0 . At the same time, At what time do the cars pass next to one another
A painter (mass = 55.7 kg) climbs 3.28 m up a 7.16 m long ladder leaning against a frictionless wall. The ladder has a mass of 16.2 kg, find Friction force between the ladder and the ground
Suppose you throw a 0.048-kg ball with a speed of 10.7 m/s and at an angle of 32.1° above the horizontal from a building 11.5 m high. What will be its kinetic energy when it hits the ground
You are a secret agent and find that you have been pushed out of an airplane without a parachute. what is your new terminal velocity with the coat
When a large bone such as the femur is broken, the two pieces are often pulled out of alignment by the complicated combination of tension, how much mass m must be attached to the bottom pulley
An eagle is flying due east at 8.9 m/s carrying a gopher in its talons. What is the magnitude of the gopher's velocity as it reaches the ground
A physics teacher tells her class that their final project requires the students to measure a specific variable and determine the velocity of a car with no more than 2.5% error. Will Jennifer and Jo
A thundercloud similar to the one described in Example 24.3 produces a lightning bolt that strikes a radio tower. find the effective resistance of the air during the lightning strike
When a 29.0-V emf device is placed across two resistors in series, a current of 10.0 A is flowing in each of the resistors. compute the magnitude of the larger of the two resistances
A boat has a mass of 6800 kg. Its engines generate a drive force of 4000 N, find the magnitude and direction of the boat's acceleration
TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 72.0-kg physicist placed himself, By how much was the antenna compressed
a closed Gaussian surface in the shape of a cube of edge length 2.03 m. What is the net charge (in Coulombs) contained by the cube
A proton is released from rest at x = -3.00 cm in a uniform electric field of magnitude 1620 N/C, What is the change in potential energy when the proton reaches x = 5.00 cm
A heat engine has an efficiency of 25%, and its heat input is 600 J per cycle from the high-temperature reservoir
A 124-? resistor and a 163-? resistor are both connected in parallel across a power supply. If the potential drop across the 124-? resistor is 12 V, what is the exact potential drop (in volts) acros
A crate of mass 56 kg is attached to one end of a string, and the other end of the string runs over a pulley and is held by a person, what is the crate's acceleration
A power station uses 100 kV to deliver power to a building. The building has a total resistance of 12.5kV. How much power is delivered to the building
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. estimate the moon\'s radial acceleration
A current I = 13.0 A flows through a strip of metal of width 4.0 cm, What is the drift velocity of the carriers in the strip