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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.
A late autumn rain falls evenly over a catchment at a rate of 9cm/hr for two hours.
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?
Indirect signaling cascades to influence gene transcription in the nucleus?
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
Find the magnitude of the velocity of the blue cart just after the first collision. Find the maximum compression in the spring.
Exactly 3.0s after a projecttile is fired into the air from a flat grround, it is observed to have velocity v=(8.6i+4.8j) ms-1. Dertermine The horizontal angle of projectile.
How far directly north of the site B should a second explosion be done so that the measured time difference recorded by the devices is the same as that for the detonation?
The space shuttle releases a satellite into a circular orbit 565 above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?