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A thin rod rotates at a constant angular speed. In case A the axis of rotation is perpendicular to the rod at its center. In case B the axis is perpendicular to the rod at one end. Explain for each case whether there are any points on the rod that have the same tangential speeds.
Suppose a bat uses sound echoes to locate its insect prey, 3.50 meter away, find the echo time for air temp 6oC.
Find the echo time for air temp of 32 degrees Celsius.
Find what percent uncertainty does this cause for the bat in locating its insect?
A solenoid 7.5 cm in radius and 88m in length has 9800 uniformly spaced turns and carries a current of 3.5 A. What is the magnetic flux through this circular surface
Assume all temperatures to be exact, and neglect significant figures for small changes in dimension. An athlete has a large lung capacity, 7.4. how many molecules of air are in the athlete's lungs
The vertical velocity of a projectile
a 30uf capacitor initially charged to 20uf is discharged through a 2.2kohms resistor. how long does it take to reduce
A laser with a power output of 2.10 mW at a wavelength of 425 nm is projected onto calcium metal. Given the binding energy is 2.28 eV, how many electrons per second are ejected
A stone is thrown vertically upward at a speed of 28.40 m/s at time t=0. A second stone is thrown upward with the same speed 2.570 seconds later. At what height do the two stones pass each other
Two ships, A and B, leave port at the same time. Ship A travels northwest at 16 knots and ship B travels at 21 knots in a direction 40° west of south, What is the direction of the velocity of ship A relative to B
When a spacecraft travels from the Earth to the Moon, both the Earth and the Moon exert a gravitational force on the spacecraft. How far from the Earth's surface must the spacecraft be
here is a point on the x-axis between the two charges where the electric field is zero. Find out the location of the point where the electric field is zero.
question a system consisting entirely of electrons and alpha particles has a net charge of 1.8410-15c and a net mass of
An oscillating block-spring system has a mechanical energy of 2.27 J, an amplitude of 8.07 cm, and a maximum speed of 1.43 m/s. Find (a) the spring constant, (b) the mass (in kg) of the block and (c) the frequency (in Hz) of oscillation.
A star is about 6.00 light years from Earth. How long would the trip take according to an Earth based observer
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