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The two plates of a capacitor hold +3400 µC and -3400 µC of charge, respectively, when the potential difference is 900 V. What is the capacitance.
A 100 liter meteorological balloon is filled with helium at STP conditions (25oC and 760 mm Hg). What will its volume become at an altitude of 50,000 ft where the barometric pressure is 175 milibars
How much energy has been "lost" during these four oscillations? We have not learned anything about damped harmonic oscillators in class yet, so if you could please include all equations that you use
Object A, which has been charged to + 24.4 nc, is at the origin. Object B, which has been charged to -18.3nc , is at (x,y)=(0 cm, 2.80 cm ) . What is the y-component of the force on B due to A?
An aluminum baseball bat has a length of 0.619 m at a temperature of 16.7°C. When the temperature of the bat is raised, the bat lengthens by 0.000137 m. Determine the final temperature of the ba
A 0.250-mm-diameter silver wire carries a 40.0mA current. What are (a) the electric field and (b) the electron drift speed in the wire? The resistivity of silver is rho=1.6 10^{-8}Omega m, and the e
What constant force, applied parallel to the surface of the ramp, is required to push the box to the top of the ramp in a time of 3.90?
The normal human eye has maximum visual acuity with a pupil size of about 3 mm. For larger pupils, acuity decreases due to increasing aberrations; for smaller pupils, acuity decreases due to increas
The speeds are different because the pipe diameters are different. What is the gauge pressure of the water on the second floor?
(a) What is the change in the ball's momentum? kg·m/s (b) What is the impulse on the ball? N·s (c) What is the impulse on the wall?
A bat locates insects by emitting ultrasonic "chirps" and then listening for echoes from the bugs. Suppose a bat chirp has a frequency of 21 kHz. How fast would the bat have to fly, and in what dire
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 21 at an angle of 35 degrees above the horizontal. a) How long does it take f
Sphere A is brought into contact with sphere B and the two are allowed to reach equilibrium. Sphere A is then removed. Next sphere A is brought into contact with sphere C and the two are allowed to
While the spring is being compressed, what work is done on the block by the gravitational force on it?
In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 4.0 at an angle of 24 above the horizontal. It is released 0.80 above the floor. Wha
A coal-fired electric power plant has an overall efficiency of 28% and an output of 1,845 megawatts. How many tera joules (trillions of joules) of waste heat does it reject to the environment each d
How are the final potentials V1 and V2 of the spheres related? Find the final charges q1 and q2. q1? q2? What is the ratio of the final surface charge density of sphere 1 to that of sphere 2?
A 20-kg package is at rest on an incline when a force P is applied to it. Determine the magnitude of P if 10 s is required for the package to travel 5 m up the incline. The static and kinetic coeffi
A damped harmonic oscillator consists of a block (m = 2.00 kg), a spring (k = 10.0 N/m), and a damping force the is linearly proportional to the velocity. Initially, it oscillates with an amplitude
Two sound waves, from two different sources with the same frequency, 508 Hz, travel in the same direction at 347 m/s. The sources are in phase. What is the magnitude of the phase difference of the w
If this heat engine and the Carnot engine do the same amount of work, what is the ratio Qh/[Qh(carnot)]?
An electron is traveling horizontally toward the north in a uniform magnetic field that is directed vertically downward. In what direction does the magnetic force act on the electron? upward south n
A batter hits a baseball 2.25 ft above the ground towards 3rd base. If the ball takes 0.65 s to get to the 3rd baseman (who is 95 ft from homeplate) and it passes just above the jumping 3rd baseman'
When we use the digital multi-meter (DMM) to measure the resistance, a current is sent through the component we are trying to measure. But if there is a current, why is the light bulb not lit when w
A proton moving at 6.40 106 m/s through a magnetic field of magnitude 1.80 T experiences a magnetic force of magnitude 7.00 10-13 N. What is the angle between the proton's velocity and the field? (E