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A camera with an 8.0-cm focal length lens is used to photograph a person who is 2.0 m tall. The height of the image on the film must be no greater than 3.5 cm.
Part A: Calculate the closest distance the person can stand to the lens.
Part B: For this object distance, how far should the film be located from the lens?
A 2.4 kilogram ball falling vertically hits the floor with a speed of 2.5m/s and rebounds with a speed of 1.5m/s. Find the magnitude of the impulse exerted on ball by floor
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an ideal monatomic gas is the working substance of a carnot engine. during the isothermal expansion the volume doubles.
An archer shoots an arrow toward a 300 g target that issliding in her direction at a speed of 3.50 m/s on a smooth,slippery surface. The 32.5 g arrow is shot with a speed of35.0 m/s and passes through the target, which is stopped by the impact.
A steel rod has a length of exactly 0.2cm at 30degree centigrade. what will be its length at 60degree centigarde?
A 5 gram bullet traveling in 20 0C air at 300 m/sstrikes a flat steel plate and stops. What is the final temperature of the lead bullet
Light travels at a constant speed of 3.0×108 m/s in a vacuum. (a) It takes light about 1.3 seconds to travel from the Earth to the Moon. Estimate the distance of the Moon from the Earth's surface, in meters.
A pulley is rotating at the rate of 32 rev/min. A motor speeds up the wheel so that 30 s later it is turning at 82 rev/min. what is the average angular acceleration in radians per second
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