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The world's largest refracting telescope is operated at the Yerkes Observatory in Wisconsin. It has an objective of diameter of 1.02 m. Suppose such am instrument could be mounted on a spy satellite at an elevation of 300 km above the surface of the earth. What is the minimum separation of two objects on the ground if their images are to be clearly resolved by this lens? (Assume average wavelength of .55 um for white light).
An object with a mass of 27 g displaces 306.6 ml of water when it is completely immersed. What is the buoyant force on the mass
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1230 Hz, What is the speed of the bird
A power supply with internal resistance of 8 ? applies a voltage of 26 V. If a load resistor of 52 ? is in series with the power supply, what is the current going through the circuit
How much work is completed in charging the capacitor
A tank holds a layer of oil, of thickness To = 1.43 m, that floats on a layer of syrup of thickness Ts = 0.640 m, What is the index of refraction of the oil
A projectile is shot horizontally at 65.3 m/s from the roof of a building 24.4 m tall. Determine the distance from the base of the building that the projectile lands
A projectile of mass 1.8 kg approaches a stationary target body at 4.8 m/s. What is the magnitude of the momentum of the target body after the collision
Assume the mass density of Earth from the center to r= R_cm (radius of the core mantle boundary) is d_cm and from R_cm until the surface r=R_e the density is d_e. Using these densities, determine the gravitational potential energy of the Earth
A source emits sound uniformly in all directions. A radial line is drawn from this source. On this line, determine the radial positions of two points, 0.786m apart, such that intensity level at one point is 1.72 dB greater than that at the other.
a 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20 m/s^2 , find the magnitude of the force of the dog on the elevator floor
A 1.2m long ramp is inclined at 13 degrees to the horizontal. A solid ball is released from rest at the to of the ramp. Find it's translational acceleration
The top of a tower much like the leaning bell tower at Pisa, Italy, moves toward the south at an average rate of 1.4 mm/y, what is the average angular speed of the tower's top about its base
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