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A high-voltage transmission line with a resistance of 0.335 ?/km carries a current of 1.45 kA, What fraction of the transmitted power does this loss represent
The small skydiver, weighing 50N, sinks 1.0m into the snow when her parachute does not open, Determine the work done by the snow in stopping the person
Two blocks (A and B) are in contact on a horizontal frictionless surface. A 40N constant horizontal force is applied to A. The mass of A is 5.0kg and the mass of B is 20kg
A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box, determine acceleration of the box
The archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth, What is the vertical component of the water's initial velocity
calculate the speed of an electron that is accelerated through the same potential difference, and Calculate the speed of a proton
While hauling a log in the back of a flatbed truck, you are pulled over by the state police, The log has a mass of m = 844 kg; the truck has a mass of M = 9750 kg. According to the truck manufacturer,
Two plates separated by a distance 18.3 mm are charged to a potential difference of 7.25 volts, Using the concept of work-energy, calculate the change in kinetic energy
An football is punted at 25.0 m/s at an angle of 30.0 degree above the horizon. What is the velocity vector of the ball when it is 5.00 m above the level ground
A 0.246-kg toy car is powered by three D cells (4.50 V total) connected directly to a small DC motor. The car has an effective energy conversion efficiency of 36.1%, What is the average current supp
A power supply maintains a potential difference of 86.1 V across a 1070-? resistor. What is the current in the resistor
An advertisement shows a 1239 kg car slowly pulling at constant speed a large passenger airplane to demonstrate the power of its newly-designed 89.7-hp (horsepower) engine, Calculate the force that
A 12.0-V battery remains connected to a parallel plate capacitor with a plate area of 0.284m2 and a plate separation of 4.14mm, What is the store energy in the capacitor
As a city planner, you receive complaints from local residents about the safety of nearby roads and streets, Given that the goal is to allow all vehicles to come safely to a stop before reaching the
Kinetic friction is a constant-value force, while static friction changed in response to other forces, up to some maximum, What if static friction behaved more like kinetic friction, with same constan
A 4.20 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest, What is the mass of the second sphere
A policeman uses a radar gun to detect the speed of drivers in a 65 mph (29.06 m/s) zone, What is the driver's speed, Is the driver breaking the speed limit
A spherical balloon has the potential to reach a diameter of 35 cm, what would be the volume of this balloon when it reaches a pressure of 0.75P0 and a temperature of -15°C
An AC source operating at 63 Hz with a maximum voltage of 170 V is connected in series with a resistor (R = 1.2 k) and an inductor (L = 3.6 H), What is the maximum value of the current in the circui
At 12 breaths/min, on a dry day when the inhaled air has almost no water content, what is the body's rate of energy loss (in J/s) due to exhaled water
In a lightning bolt, a large amount of charge flows during a time of 1.6 x 10-3 s, How much charged has flowed during the lightning bolt
When a potential difference of 168 V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of 23.0 nC/cm2. What is the spacing between the plates
A 501g mass oscillates with an amplitude of 11.0cm on a spring whose spring constant is 23.0N/m, determine the period and max speed
A dockworker applies a constant horizontal force of 72.0N to a block of ice on a smooth horizontal floor, What is the mass of the block of ice
You are now studying a length of wire that has been coiled up to create a circular coil of 4 turns all arranged compactly, The loop has radius of 0.0240 m and a current of 49.5 A, What is the strengt