Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Marianne puts her favorite Backstreets Boys disc in her CD player. If it spins with a frequency of1800 revolutions per minute, what is the period of spin of the compact disc?
A proton in a uniform electric field of 3.0 X 105 N/C is moving with an initial speed of 800,000 m/s in the direction direction opposite the direction of the field.
An insulated Thermos contains 119 cm3 of hot coffee at 64 °C. You put a 12.0 g ice cube at its melting point to cool the coffee. By how many degrees has your coffee cooled once the ice has melt
A car of mass M = 1200 kg traveling at 55.0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires. What
Two identical positive charges separated by 12.5 cm exert a repulsive force of 1.24 N on each other what is the magnitude of the charges?
Snow begins to fall vertically and fills the car at a rate of 3.50 kg per minute. Ignoring friction with the tracks, what is the speed of the car after 86.4 minutes?"
Sam, whose mass is 61.0 kg, takes off down a 49.0 m high, 9.00^circ slope on his jet-powered skis. The skis have a thrust of 180 N. Sam's speed at the bottom is 45.0 {rm m/s}. What is the coefficien
Two Polaroids are aligned so that the light passing through them is a maximum. At what angle should one of them be placed so that the intensity is subsequently reduced by 50 percent?
What must the charge (sign and magnitude) of a 1.43-g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 630?
A motorist is traveling at 12 m/s when he sees a deer in the road 43 m ahead. If the maximum negative acceleration of the vehicle is -7 m/s/s, what is the maximum reaction time (delta)t of the moto
An observer is traveling at 0.49 times the speed of sound. What is the observed frequency if the observer moves toward the source?
A 230 g block is attached to a horizontal spring and executes simple harmonic motion with a period of 0.250 s. The total energy of the system is 1.00 J. Find the force constant of the spring.
It has been suggested that rotating cylinders about 8 mi long and 6.1 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acc
A 1900 kg car traveling to the right at 22 m/s is chasing a second car of the same mass that is traveling to the right at 10 m/s. What fraction of the initial kinetic energy of the cars is lost dur
Ricardo notices that the canoe moved 50.3 cm relative to a submerged log during the exchange and calculates Carmelita's mass, which she has not told him. What is it?
An Earth observer measures the two spaceships to be the same length. If the slower spaceship is moving with a speed of 0.332 c, determine the speed of the faster spaceship.
The focal length of a relaxed human eye is approximately 1.86 cm. When we focus our eyes on a close-up object, we can change the refractive power of the eye by about 18 diopters. Calculate the foca
A 1100 N crate is being pulled across a level floor by a force F of 325 N at an angle of 33° above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.25. Fi
Calculate the minimum amount of energy, in joules, required to completely melt 140 g of silver initially at 14.0°C.
A woman stands on a scale in a moving elevator. Her mass is 57.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward. Dur
When the wax melts, the block slides out to the end of the rod. What is the final angular velocity? Give your answer in rpm.
A hiker's trip consists of three segments. Path A is 8.0km long heading 60 degrees north of east. Path B is 7.0km long in a direction due east. Path C is 4.0km long heading 315 degrees counterclockw
A 2.0 kg block is attached to a string that is wrapped around a 4.0 kg, 4.0-cm-diameter hollow cylinder that is free to rotate. (Use the figure below, but treat the cylinder as hollow.) The block is
A charge Q is located inside a rectangular box. The electric flux through each of the six surfaces of the box is: 1 = +1600 N · m2/C, 2 = +4000 N · m2/C, 3 = +1600 N · m2/C, 4
The mass of the ball is 0.045 kg, and the duration of the impact with the golf club is 6 x 10-3 s. What is the change in momentum of the ball.