What is the magnification
A camera is equipped with a lens with a focal length of 30cm. When an object 2m (200cm) away is being photographed; how far from the field should the lens be placed? What is the magnification?
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A proton is initially at rest at a point where the potential is 499 V. Some time later the proton is at a point where the potential is 211 V. If no force other than the electrostatic force acts on the proton, what is its final kinetic energy?.
A sheet of glass has and . A narrow beam of white light is incident on the glass at 33.0. What is the angular spread of the light inside the glass?
The mass of Earth is 5.98 x 10^24 kg, and the mass of a single proton is 1.673 x 10^-27 kg. Assuming Earth is made entirely of protons, use an order-of-magnitude calculation to estimate the number of protons that make up Earth. Then, calculate the
Find the frictional force (magnitude and direction) on the crate if the crate is sliding up the ramp. what is the magnitude N?
How much work must Denise do to drag her basket of laundry of mass 5 kg a distance of 3 m along a floor, if the force she exerts is 20 N at an angle of 60.0 with the horizontal?
Joe has a ring weighing 13 grams made of an alloy of 16 silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 69 . How many grams of silver should he add?
An ocean liner leaves New York City and travels 37.0° north of east for 189 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the following directions
When two tuning forks of 123 Hz and 136 Hz, respectively, are sounded simultaneously, how many beats per second are heard?
The position of a mass M on a spring of constant k is represented by the formula x(t) = [0.60sin(2.5t+1)]m. Find the amplitude and angular frequency of the motion.
A solenoid of length 14.2 cm consists of a wire wrapped tightly around a wooden core. The magnetic field strength is 3.33 T inside the solenoid. If the solenoid is stretched to 27.2 cm by applying a force to it, what does the magnetic field become
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