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When an object is 12 centimeter in front of a concave mirror, the image is 3.0 centimeter in front of the mirror? Evaluate what is the focal length of the mirror?
Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm; what force is exerted by the biceps muscle
An elevator moving upward approaches the top floor of a high rise building and begins to slow down at the rate of 2.00 m/s2. Calculate the apparent weight of the passenger if her mass is 60.0 kg
Surgeons can remove brain tumors by using a cavitron ultrasonic surgical aspirator, which produces sound waves of frequency 23.7 kHz. Estimate the wavelength of these waves in air
Water in a rotating container of radius 50mm is 30 mm lower in the center than at the edge. Find the angular velocity of the container
A humanitarian aid package is dropped from a plane flying horizontally 500m above the ground with a speed 100m/s. What is the speed of the package at time of impact? (Calculate the total speed, not a horizontal or vertical projection.)
a skydiver deploys his parachute when he is 1020 directly above his desired landing spot. he then falls through the air
A person pushes on a stationary 125 N box with 64 N at 30 deg below the horizontal, What is the force friction on the box
At the instant the car begins to accelerate, a truck with a constant velocity of 21 m/s passes in the next lane. Explain how far will the car travel before it overtakes the truck?
Electrons are used in a single-slit diffraction experiment. Such an experiment works well if the slit has a width of 10 times the wavelength. what is the electron energy
The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10-10 T. What is the intensity of the wave? (c = 3.0 x 108 m/s, c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, u0 = 8.85 × 10-12 C2/N ? m2)
a rubber ball dropped from a height of 2 bounces back to a height of 1. draw the balls position and velocity graphs
In a certain automobile engine with an efficiency of 21.2%, combustion of gasoline in one cylinder releases 505 J of heat. Find the work done by the system of gasoline vapor and air on the surroundings during one cycle
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