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The wheel of a sport car is suspended below the body of the car by a vertical spring with a spring constant 1.1 x 104 N/m. The mass of the wheel is 14 Kg and the diameter of the wheel is 61 cm. What
Facing the axle, a 35 kg child hops onto the merry-go-round, and manages to sit down on the edge. What is the new angular speed of the merry-go-round? Answer in units of rev/min.
Calculate the mean scattering cross-section at a frequency of 5 MHz of a distribution of air bubbles of 3 μm mean radius, assuming a Gaussian size distribution of a variance of 1 μm and 1.5 &m
The bullet hits the target 1.90 cm below the aim point. What was the bullet's flight time? What was the bullet's speed as it left the barrel?
A force of 339 N is applied horizontally to a wooden crate in order to displace it 35.0 m across a level floor at a constant velocity. As a result of this work the crate's internal energy is increa
We introduce the X thermometric scale, where the melting point (280?C) of a particular alloy is 213?X and the freezing point (-72?C) of a particular liquid is 33?X. At what temperature does water bo
The charge on an electron is 1.6 × 10-19 C. How many electrons are transferred from the wool shirt to the plastic rod?
A conducting rod AB of length d = 1.4 makes contact with the metal rails AD and BC as shown in the diagram. The apparatus is in a uniform magnetic field of flux density 380 , perpendicular to the p
A(n) 4.02 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest. The composite system moves with a speed equal to one-third the original speed of the 4.02 kg
You are making pesto for your pasta and have a cylindrical measuring cup 12.0 high made of ordinary glass that is filled with olive oil to a height of 1.40 below the top of the cup
Dan is gliding on his skateboard at 4.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is
The area of a typical eardrum is about 5.0 10-5 m2. Calculate the sound power (the energy per second) incident on an eardrum at the threshold of hearing. and the threshold of pain?
Its maximum braking rate cannot exceed .7g. What is the minimum time required to go 1/2mi, assuming it begins and ends at rest?
A 240 block on a 60.0cm -long string swings in a circle on a horizontal, frictionless table at 60.0rpm. a) What is the speed of the block? b) What is the tension in the string?
Two loudspeakers in a 20^circ {rm{C}} room emit 690 Hz sound waves along the x-axis. What is the smallest distance between the speakers for which the interference of the sound waves is destructive?
What is the greatest mass of groceries that can be safely placed if the bag is being lifted upwards with an acceleration of 1.41 m/sec2?
A plane flies 335 km due south, then turns and flies 616 km at a heading north of east, until it's due east of its starting point. If the plane now turns and heads for home, how far will it have to
The speed of light is 1.10 times larger in material A than it is in material B. Determine the ratio nA/nB of the refractive indices of these materials.
The potential difference between a storm cloud and the ground is 100 million V. if a charge of 2 C flashes in a bolt from cloud to Earth, what is the change of potenial energy of the charge?
A proton orbits a long charged wire, making 1.30 times 10^{6} revolutions per second. The radius of the orbit is 2.00 cm. What is the wire's linear charge density?
(a) How high above the ground is the highest point that the skateboarder reaches? (b) When the skateboarder reaches the highest point, how far is this point horizontally from the end of the ramp?
A droplet of ink in an industrial ink-jet printer carries a charge of 1.6 x 10^-10 C. Show that the strength of the electric field to produce this force is 2 million N/C.
The current in wire 1 is going into the page and it is equal to 15 A and the current in wire 2 is going out of the page and it iis equal to 11 A respectively. What is the magnitude of the magnitic f
Two loudspeakers in a 20 room emit 684 sound waves along the x-axis. What is the smallest distance between the speakers for which the interference of the sound waves is destructive?
A weight (with a mass of 61 kg) is suspended from a point at the right-hand end of a uniform boom with a mass of 40 kg . A horizontal cable at an elevation of 4.5 m is attached to the wall and to t