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A variable-speed drill, initially turning at 300 rpm, speeds up to 1300 rpm in a time interval of 0.3 s
it's nighttime, and you've dropped your goggles into a swimming pool that is 3.2 m deep. How far are the goggles from the edge of the pool
The electric field between the plates of the velocity selector is 4900 V/m, and the magnetic fields in both the velocity selector, compute the radius r of the path for a singly charged ion with mass
A pipe open at one end and closed at the other has a fundamental frequency of 308 Hz at 3.70 degrees
A pair of earplugs claims to reduce the sound level by 37.1 dB. By what factor is the intensity reduced
A system of 1610 particles, each of which is either an electron or a proton, How many electrons are in this system
Suppose you hear a clap of 4.63 seconds after seeing the lightning stroke. how far are you from the lightning stroke
Theradius changes from 10.0 cm to 20.0 cm in a time of 8.0 s.The magnetic field is 3.0 T. The loop has a resistance of 5.0 ohms. what is thevalue of the current while the radius is changing
A cell has a 7.0-nm-thick membrane with a total membrane area of 6.0\times10^{-9}\;{\rm m^2}, How many sodium ions does this charge correspond to
You want to nail a 1.3-kg board onto the wall of a barn. What happens to the force of static friction if you push against the wall with a force greater than that found in part A
Pulsed lasers used in science and medicine produce very short bursts of electromagnetic energy. how many wavelengths are found within the laser pulse
A steel wire is used to stretch a spring. An oscillating magnetic field drives the steel wire back and forth. what stretch of the spring produces a standing wave with six nodes
A 80.0 Hz generator with an rms voltage of 150 V is connected in series to a 3.20 k ohm resistor, estimate the phase angle between the current and the voltage
a block with a mass of 2.50kg is resting on a ramp. find the max static friction force that acts on the block.
A piece of copper wire has a resistance per unit length of6.1510-3?/m. Find the magnetic field strength at the center of the coil
Two capacitors, C1 = 32.0 µF and C2 = 4.00 µF, are connected in parallel and charged with a 110-V power supply. Calculate the total energy stored in the two capacitors
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). What is the speed at which the satellite travels
The mass of the sled and its two riders in the figure below is 300 kg. find the magnitude of the centripetal force that acts on the sled
A jet flying at 125 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, Calculate the magnitude of the necessary lifting force
In the figure the man hanging upside down is holding a partner who weighs 505 N. what force must the man apply to his partner in the straight-down position
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 , length 84.4, Calculate the weight of the rod
A 80.0 Hz generator with an rms voltage of 150 V is connected in series to a 3.20 k ohm resistor and a 3.50 micro farad capacitor. Find the phase angle between the current and the voltage
You took a job as a space station scientist. On a spacewalk you get separated from the station. At what speed will you move back toward the station
A 4-g bullet is fired into a 1.4-kg block that is resting on a table. After impact, What was the initial speed of the bullet?