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A puck slides on a surface for 5.6 m before it stops. If it was moving at a velocity of 15 m/s and has a mass of 1.2 kg, what is the force of friction exerted on the puck
A 35 g bullet is fired in a ballistic pendulum device (see page 178 In text), what was the initial velocity of the bullet
A rail car of mass 4500 kg is moving with a velocity of 12.4 m/s collides with a stationary rail car of mass 6700 kg. What is the velocity of the two cars
A cigarette lighter in a car is a resistor that, when activated, is connected across the 12-V battery. Suppose a lighter dissipates 32 W of power. find the resistance of the lighter
The average power used by a stereo speaker is 54 W. find the peak value of the ac voltage applied to the speaker
an airplane travels 85 km,62degrees north of east. Its displacement is represented by the vector A in the drawing
The voltage drop along a 30.0m segment of a power line made from copper wire (a very good conductor) is 1.2V, while carrying a current of 25.0 A. How large is the electric field along the wire
When an uncharged parallel-plate capacitor is connected to a 50.0V battery, it is noticed that 22.0 microColumbs of charge flowed out from the + terminal of the battery, What is the value of the cap
An electron is accelerated from rest through a potential difference of 2.50 kV. What would be its de Broglie Wavelength
An initially neutral conductor contains a hollow cavity in which there is a -100 nC point charge. what is the charge on the inner wall of the cavity wall
Inside a motor, 30.5 A passes through a 250 turn circular loop that is 10.0 cm in radius. what is the magnetic field strength created
A cosmic ray electron moves at 7.85 multiplied by 106 m/s perpendicular to the earth's magnetic field at an altitude where field strength is 1.10 multiplied by 10-5 T
You've always wondered about the acceleration of the elevators in the 101 story high Empire State Building. What is the magnitude of the acceleration as the elevator starts upward
Four identical charges (+1.7 %u03BCC each) are brought from infinity, compute the electric potential energy of this group
o particles with charges +9e and -9e are initially very far apart (effectively an infinite distance apart). which is the change in the electric potential energy
a tennis player receieves a srve with the ball travelling horizontally towards him at 50 m/s: what was the change in momentum of the ball
assume that the tale applies a constant force of friction of 0.5 N block. if the block compresses the spring by 3cm after hitting it, what was the speed of the ball(hit spring)
a man pushes horizontally on a desk that ress on a wooden floor and moves the desk by 3m. the coeffrcient of kinetic friction between the desk, what is the total work done on the block
A uniform linear charge density of 4.0nC/m is distributed along the entire x-axis. Determine the electric flux through this surface
At a rock concert, the sound intensity 1.0m in front of the bank of loudspeakers is 0.10W/m^2. How much energy is transferred to each eardrum in one second
Suppose a 34-kg child sits 1.24 m to the left of center on a seesaw of length, L= 3.74 m, pivoted in the middle. Find the normal force acting on the pivot point
Gold, which has a mass of 19.32 g for each cubic centimeter of volume, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. what is the area of the leaf in s
A person who weighs 616 N is riding a 108-N mountain bike. find the area of contact between each tire and the ground
A major motor company displays a die-cast model of its first automobile, made from 5.14 kg of iron. What mass of gold is needed to make the new model
A solid concrete block weighs 250 N and is resting on the ground. Its dimensions are 0.400 m x 0.190 m x 0.0880 m. What is the smallest number of whole bricks