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Some light rays from a small object sitting on the optical axis of a lens pass through a lens and then all of the rays emerging from the lens travel parallel to the optical axis. What can be said about the lens and the location of the object?
a. it is a diverging lens with the object located outside the focal point
b. it is a diverging lens with the object located insde the focal point
c. it is a converging lens with the object located at the focal point
d. it is a converging lens with the object located outside the focal point
e. it is a converging lens with the object located inside the focal point
The four tires of an automobile are inflated to a gauge pressure of 2.04E+5 Pa. Determine the weight of the automobile
You need to fit a copper collar tightly around a steel shaft that a has a diameter of 5.600 cm at 20°C. The inside diameter of the collar at that temperature is 5.573 cm. What temperature must the copper collar have so that it will just slip on the s..
At room temperature what is the strength of the electric field in a 6-gauge copper wire (diameter 4.12 mm) that is needed to cause a 1.73-A current to flow?
A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 52.5 kg and air resistance exerts a total upward force of 610 N on her and her parachute.
A hockey puck moving at 34m/s slams through a wall of snow 40cm thick. It emerges moving at 17m/s. find the time the puck spends in the snow
A boy shoots a BB gun horizontally at a target 15 m away. The gun is aimed directly at the center of the target, but the small metal BB hits 56 cm lower. avoid any air resistance, what was the initial speed of the BB.
four charges q=4nC form a square, 20 cm on a side. what is the potential of electric field at the center of the square
A 111g Frisbee is 25cm in diameter and has half its mass spread uniformly in the disk and the other half concentrated in the rim. What is the Frisbee's rotational inertia
A ball is thrown so that its initial vertical and horizontal components of velocity are 60 m/s and 15 m/s, estimate the ball's total time of flight
the speed of light in a material is 0.41 c. what is the critical angle of a light ray at the interfacce between the material and a vacuum
A 140g oscillator has a speed of 90.5cm/s when its displacement is 1.70cm and 55.0cm/s when its displacement is 5.20cmcm. What is the oscillators maximum speed
Four identical charges, +Q, occupy the corners of a square with sides of length a. A fifth charge, q, can be placed at any desired location. Find the loction of the fifth charge, and value of q, such that the net electric force acting on each of t..
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