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Magnetic resonance imaging (MRI) is a medical technique for producing pictures of the interior of the body. The patient is located within a strong magnetic field. One safety concern is what would happen to the positively and negatively charged particles in the body fluids if an equipment failure caused the magnetic field to be shut off suddenly. An induced emf could cause these particles to flow, producing an electric current within the body. Assume the largest surface of the body through which flux passes has an area of 0.022 m2 and a normal that is parallel to a magnetic field of 1.5 T. Find the smallest time period during which the field can be allowed to vanish if the magnitude of the average induced emf is to be kept less than 0.010 V. s
Communication satellites are geosynchronous, meaning that they have a rotational period equal to one day. what is the altitude of a geosynchronous satellite above the Earth's surface in kilometers
Three 15-? resistors are connected in parallel. This arrangement is connected in series with a 10-? resistor. What is the effective resistance of the parallel portion of the circuit
q1. a 1000kg experimental rocket sled at rest on level frictionless rails is loaded with 50kg of propellant. it
a uniform thin rod of length 0.60 m and mass 3.0 kg can rotate in a horizontal plane about a vertical axis through its
A rock is thrown from the edge of a cliff to the ground 24.0 m below. The rock has an initial velocity of 13.5 m/s, directed 24.0° above the horizontal. Find the velocity of the rock just before it strikes the ground
when a potential difference of 7.35 volts is applied to a certain ohmic resistor the current in the resistor is 0.919
A spring is compressed by 0.0617 m and is used to launch an object horizontally with a speed of 2.58 m/s. at what angular frequency (in rad/s) would it oscillate
A person's body is covered with 1.69 m2 of wool clothing. The thickness of the wool is 2.12 × 10-3 m. How much heat per second does the person lose due to conduction
After 10.7 s, a spinning roulette wheel has slowed down to anangular velocity of 2.25 rad/s. Determine the angular displacement of the wheel
three liquids are at temperatures of 10 degrees c 20 degree c and 30 degrees c respectively. equal masses of the first
A 40.0 kg ballet dancer stands on her toes during aperformance with four square inches (26.0 cm^2) in contact with thefloor. What is the pressure exerted bt the floor over the area ofcontact in the following cases?
An ideal gas is enclosed in a cylinder that has a moveable pistonon top. The piston has a mass of 3900 gand an area of 7.00 cm2 and isfree to slide up and down, keeping the pressure of the gasconstant. How much work is done on the gas as the temperat..
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