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A piece of wire with mass per unit length 70 runs horizontally at right angles to a horizontal magnetic field. A 5.7 current in the wire results in its being suspended against gravity.
A 100-kg barrel with a radius of 25.9 cm has two ropes wrapped around it, as shown in the figure. The barrel is released from rest, causing the ropes to unwind and the barrel to fall spinning towar
A roller coaster (375. kg) moves from A (5.00 m above the ground) to B (19.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain m
A simple pendulum has a mass of 0.650 kg and a length of 1.00 m. It is displaced through an angle of 13.0° and then released. Using the analysis model of a particle in simple harmonic motion, ca
A tennis ball initially moves with a velocity of 30.0 m/s horizontally to the right. A tennis racket strikes the ball, giving it a velocity of 30.0 m/s to the left. Treat the collision as elastic a
What was the magnitude of the average acceleration of the driver during the collision? Express the answer in terms of "'s," where 1.00 = 9.80
A 368 g glass coffee cup is at a room temperature of 20C. It is then plunged into hot dishwater at 83C. If the temperature of the cup reaches that of the dishwater, how much heat does the cup abso
10m at the left where the care runs out of gas and 15 m at thr right were it is headed. What will be the car's speed as it coasts into the gas station on the other side of the valley?
He would like a prescription for contact lenses to serve the same purpose. What is the correct contact lens prescription, in diopters?
A spaceship is approaching a space station at a speed of 2.10*10^5 m/s. What is the frequency of the beacon observed on the spaceship? What is the change in this frequency?
The acceleration of gravity is 9.8 . What is the required minimum coefficient of static friction between the road and the car's tires to keep the car from skidding?
Calculate the change in the melting point of naphthalene for one atmosphere rise in pressure given that its melting point is 80 oC. Latent heat of fusion is 4563 cal/mol and increase in volume on fu
A 220 g block on a 50 cm long string swings in a circle on a horizontal, frictionless table at 60 rpm. What is the Speed of the block? What is the tension of the string?
An aluminum rod is 40.0 cm long and a steel rod is 30.0 cm long when both rods are at a temperature of Both rods have the same diameter. The rods are joined end-to-end to form a rod long. The coeff
A coin is placed 9.0 from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 34 is reac
What is the area of the Gaussian surface of radius r? (d) The electric field points radially outward at all points within the sphere.
A 94 kg man lying on a surface of negligible friction shoves a 69 g stone away from himself, giving it a speed of 4.0 m/s. What speed does the man acquire as a result?
If the duration of the collision was t=.003s, find the average force (Magnitude and Direction) exerted on the potato by the bullet.
The electric attraction between the two objects provides the centripetal force to keep the particle in orbit. The orbital speed of the particle is 6.510e+4 m/s. What is the charge on the sphere?
An alpha particle (charge = +2e) is sent at high speed toward a nucleus (charge = 74e). What is the electric force acting on the alpha particle when it is 2 10-14 m from this nucleus?
An archer shoots an arrow at 21.6 m/s at an angle of 36.2 degrees. Assuming air resistance is negligible, calculate the impact speed of the arrow.
An 6.8kg ball, hanging from the ceiling by a light wire 145cm long. Find the tension in the wire just after the collision.
A diffraction grating with exactly 1000 lines per centimeter is illuminated by a He-Ne laser of wavelength 633 nm. What is the highest order of diffraction that could be observed with this grating?
A 6.93 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 19.2 N. Find the speed of the block after it has moved 3.13 m.
For each of the following, decide what type of observation (imaging, spectroscopy, timing) you would need to make.