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A kayaker paddles with a power output of 60.0 W to maintain a steady speed of 1.40 m/s, by what factor does the kayaker's speed change
A white billiard ball with mass mw = 1.48 kg is moving directly to the right with a speed of v = 3.05 m/s, what is the final speed of the black ball
A 60 kg bicyclist rides his 9.8 kg bicycle with a speed of 16 m/s. What is the magnitude of the braking force
A 45.2-kg girl is standing on a 143-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, What is the girls velocity relative to the ice surface
A coil of wire is connected to an ideal 12.0-V battery at t = 0. At t = 14.2 ms, the current in the coil is 210 mA. calculate the inductance of the coil
A novice skier starting from rest slides down a frictionless 32 degree incline whose vertical height is 125 meters
Two cylinders each contain 0.30 mol of a diatomic gas at 300 K and a pressure of 3.0 atm. What is the final temperature of the gas in the cylinder A
To keep her dog from running away while she talks to a friend, Susan pulls gently on the dog's leash with a constant force given by F = (2.1 N ) ^x+ (1.5 N )^y, How much work does she do on the dog
The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5
A scaffold of mass 57 kg and length 6.5 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
An artificial satellite circling the Earth completes each orbit in 118 minutes. Find the altitude of the satellite
A satellite has a mass of 102 kg and is located at 2.02 106 m above the surface of Earth. find the magnitude of the gravitational force on the satellite
A thin spherical shell has a radius of 1.70 m. An applied torque of 920 N m imparts to the shell an angular acceleration equal to 6.70 rad/s2 about an axis through the center of the shell. What is t
An air puck of mass m1 = 0.32 kg is tied to a string and allowed to revolve in a circle of radius R = 1.1 m on a frictionless horizontal table. What is the horizontal force acting on the puck
Two coils have the same number of circular turns and carry the same current. Each rotates in a magnetic field acting perpendicularly to its axis of rotation. What is the radius (in cm) of coil 2
Two coils are close to each other. The first coil carries a time-varying current given by I(t) = (5.80 A) e-0.0250tsin(377 t). What is the mutual inductance of the coils
LC circuit consists of a 20.0 mH inductor and a 0.750 µF capacitor. find the greatest potential difference across the capacitor
What is the number of turns on the coil and what is the magnetic field at the mean radius?
A skier leaves the ramp of a ski jump with a velocity of 30.0 m/s The slope is inclined at 50.0°, Find the distance from the ramp to where the jumper lands
initially unpolarized light is sent into a system of three polarizing sheets whose polarizing directions make angles of ?1 = ?2 = ?3 = 51° with the direction of the y axis, What percentage of th
A zookeeper and a monkey. The zookeeper shot a tranquilizer gun with an initial v=30m/s. The monkey was up on a tree 140m high. What is the monkeys speed during free fall
A bike wheel (I=m*(r^2)) is spinning at 20 rad/s, at which point a 100 g rat jumps onto the wheel, what is the mass of the bike wheel
A block of mass 77 g floats on a fluid, oscillating up and down at a frequency of 8 Hz. What is the value (in N/m) of the effective spring constant of the fluid
A microscope has an objective lens with a focal length of 2.0cm, an eyepiece with a focal length of 0.25 cm, What is the magnification of the microscope
You come across an open container which is filled with two liquids. Since the two liquids have different density there is a distinct separation between them. what is the density of the unknown fluid