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You heat up a chocolate bar in your microwave oven without rotating plate for 15 seconds on high. You exam the chocolate bar, it is not evenly melted. You measure the distance of 5 cm between the two consequent melted points. Frequency of the microwave was found to be 2450 MHz at the back of the oven. Find the speed of microwaves in the oven.
A laser emits a cylindrical beam of light 1.3 mm in diameter. what is the rms valueof the electric field in the laser beam
A scientist notices that an oil slick floating on water when viewed from above has many different rainbow colors reflecting off the surface. Compute the minimum thickness of the oil slick at that spot
Two slits of equal width are a distance 0.57 mm apart and are illuminated by coherent, mono-chromatic light. compute the widths of the slits
Four identical point charges of +3.0 µC are located in air at the four corners of a square that is 40 centimeter on a side. Evaluate the force on any one of the charges
A burglar is running as fast as he can on the flat roof of a building, trying to escape the police. As he approaches the ledge, he spots another flat rooftop that is 8.0m across the alley and 3.0m lower than the building on which he is currently runn..
A diffraction grating with 343 lines/mm is 1.00 m in front of a screen. Discuss is the wavelength of light whose first-order maxima will be 13.7 cm from the central maximum on the screen?
A 5 kg rock is dropped from rest down a vertical mine shaft. How long does it take for the rock to reach a depth of 79 m? Neglect air resistance.
A slingshot will shoot a 19 g pebble27.0 m straight up. How much potential energy is stored in the sling shot's rubber band
Just an instant before reaching the very bottom of a semicircular section of a roller coaster ride, determine the normal force of the track on the car
two shuffleboard disks of equal mass one orange and the other yellow are involved in a perfectly elastic glancing
A laser pulse has an energy of 24 J and a beam radius of 2 mm. Find the rms values of the electric and magnetic fields in the pulse
a ditch 2.5 m wide crosses a trail bike path. nbspan upward incline of 15 degrees has been built up on the approach so
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