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There is a net passage of 6.0 x 1018 electrons by a point in a wire conductor in 0.14 s. What is the current in the wire?
A spring (spring constant = 104 N/m) is mounted on the floor and is oriented vertically. A 0.400 kg block is placed on top of the spring and pushed down to start it oscillating in simple harmonic m
Determine the magnitude of the electric field along the axis of the rod at a point 47.2714 cm from the center of the rod.
An object is found to have a weight in air of 500 N. It is then tied to a string connected to a balance and immersed in water (density of water is 1000 kg/m3). The scale now reads 450 N. Finally th
One mole of an ideal gas does 2160 J of work on the surroundings as it expands isothermally to a final pressure of 0.8 atm and volume of 37 L. The universal gas constant is 8.31451 J/K · mol.
A square coil that is 20 cm on a side is made of 10 turns of wire. It is in a 0.8T magnetic field that is perpendicular to the plane of the coil. The coil has a resistance of 100 ohms. If it takes 0
You design a simple friction-brake to stop the cylinder by pressing the brake against the outer rim with a normal force. The coefficient of kinetic friction between the brake and rim is 0.344. What
During a hard sneeze, your eyes might shut for 0.30 s. If you are driving a car at 120 km/h during such a sneeze, how far does the car move during that time?
On a rainy day, raindrops fall with a vertical velocity of 11.7 m/s. If a car drives through the rain at 87.0 km/hr, what is the magnitude of the velocity of the raindrops relative to the car?
A cylindrical shell of radius 9 cm and length 277 cm has its charge density uniformly dis- tributed on its surface. What is the net charge on the shell?
Suppose the force acts at the bottom end of the rod. Find the acceleration of its center of mass and the horizontal force the hinge exerts.
The ratio of the average acceleration values is a1/a2 = 1.61. Find the velocity of the car at the end of the initial ten-second interval.
Two vectors A and B have the same magnitude of 100 N (they represent forces of equal strength). What is the magnitude of the resultant vector of A and B if they are parallel and pointing in opposit
She comes to rest 1.12 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This force is nonconservative.
When one person shouts at a football game, the sound loudness at the center of the field is 50 dB. When all the people shout together, the loudness increases to 110 dB. Assume that each person is ab
What is the average acceleration of the cheetah from t = 0 to t = 4.0 seconds? (b) What is the average acceleration of the cheetah from t = 0 to t = 5.0 seconds?
An 86kg man drops from rest on a diving board 3.0m above the surface of the water and comes to rest 0.55s after reaching the water. What is the net force on the diver as he is brought to rest?
If the car accelerate at 22.4m/s, how much time till you reach the speed of sound? how many kilometers will you travel before you reach that speed?
A car of mass 557 kg travels around a flat, circular race track of radius 73.8 m. The co- efficient of static friction between the wheels and the track is 0.298. The acceleration of gravity is 9.8 m
a) Is the acceleration due to gravity on this planet more than, less than, or the same as the acceleration due to gravity on the Earth? Explain. b) Calculate the acceleration due to gravity on this
If the brakes are applied for 3.0 s, how fast is the car going at the end of the braking period? How far has it gone from its start?
A radio-controlled car increases its kinetic energy from 4 J to 12 J over a distance of 2 m. What was the average net force on the car during this interval?
The coefficient of kinetic friction between the crate and the ground is .473. Determine the tension in the rope between the truck and crate.
A spherical water drop 1.30 µm in diameter is suspended in calm air owing to a downward-directed atmospheric electric field E = 512 N/C.
A slingshot fires a pebble from the top of a building at a speed of 13.0 m/s. The building is 35.0 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the p