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1. A candle is placed 1.270m in front of a converging lens. The image of the object is focused on a screen 1.376m behind the lens. What is the focal length of the lens?
2. What is the magnification of the image? (if the image is inverted, the magnification should be negative)
At this point, person doing the laundry opens the lid, and a safety switch turns off the washer. The tub smoothly slows to rest in 11-s. Through how many revolutions does the tub turn while it is in motion.
A car is travelling at a constant speed of 32m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from ramp.
Sources A and B emit long-range radio waves of wavelength 530 m, with phase of the emission from A ahead of that from source B by 90°. The distance rA from A to a detector is greater than corresponding distance rB from B by 110 m. What is the magni..
an electron and a proton are each accelerated through a potential difference pf 10.0 million volts. Find the momentum ( in MeV/c) and the kinetic Energy ( in MeV) of each and compare with the results of using the classical Formular.
Calculate the number of cells in a hummingbird assuming the mass of an average cell is ten times the mass of a bacterium
Express your answers using two significant figures. Enter the x and y coordinates of the charge separated by a comma.
A 0.50-kg object is attached to an ideal massless spring of spring constant 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of 1.7 m/s at the equilibrium position.
A 0.450-kg ball is dropped from rest at a point 1.30-m above floor. The ball rebounds straight upward to a height of 0.700-m. What are the magnitude and direction of the impulse of the net force applied to the ball throughout the collision with th..
An interstate highway has been built through a neighborhood in a city. In the afternoon, the sound level in an apartment in the neighborhood is 95.0 dB as 105 cars pass outside the window every minute. Late at night, the traffic flow is only six c..
What is the distance delta y between the two points that you observe? suppose that the plates have length d , and use e and m for the charge and the mass of the electrons, respectively.
The magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius of 0.545m, Find the magnitude of the magnetic field inside the toroid at the following locations
a falling flower pot passes a 1.5 m tall window of an apartment building in a time of .16 s. how fast was the pot falling at the top of the window? from what height above the top of the window was the pot dropped?
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