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A lab uses a beam of electrons to probe the structure ofprotons and neutrons held in a target vessel. The maximumbeam current the lab can deliver is 100x10-6 A. How many electrons strike the target each second?
An eagle with a 2.1m wingspan flaps its wings back and forth 20 times per minute, each stroke extending from 45 degrees above the horizontal to 45 degrees below. what is the average angular velocity of the wing
Two microscope slides are placed one on top the other. They are in contact at one end but a hair separates them at the other end. What is the thickness of the hair
A standing wave on a string that is fixed at both ends has frequency 80.0 Hz. What is the speed of the waves on the string
A generator consists of 23 loops, each with an area of 0.010m^2 located inside a uniform magnetic field of 2.0T. What is the rms voltage
A capacitor has parallel plates of area 12 cm2 separated by 4.5mm . The space between the plates is filled with polystyrene, Find the induced surface-charge density on the surface of the dielectric
a 330 kg piano is pushed 3.6 m up a 28 degree incline by three men starting at rest at the bottom of the hill and ending at 41 cm/s. What is the net work done on the piano
The human body has a surface area of approximately 1.8 m^2, a surface temperature of approximately 30 degrees celsius, how many photons per second does the body emit
High-altitude mountain climbers do not eat snow, but always melt it first with a stove. Calculate the energy absorbed from a climber's body if he eats 0.70kg of -15?C snow which his body warms to body temperature of 37?C
A certain person in a typical conversation speaks at a sound level of 63 dB. The music at a certain rock concert reaches a sound level of 110 dB. How many times as great is the intensity of the music?
Big Ben, the Parliament tower clock in London, has an hour hand 2.70 m long with a mass of 300 kg, Calculate the total rotational kinetic energy of the two hands about the axis of rotation
A wire carries a current of 0.616 A. This wire makes an angle of 56.7° with respect to a magnetic field of magnitude 4.63E-5 T. The wire experiences a magnetic force of magnitude 7.17E-5 N. What is the length of the wire?
A race car starts from rest on a circular track of radius 515 m. The car's speed increases at the constant rate of 0.330 m/s2. determine the speed of the race car
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