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For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. Each time the heart beats, blood is pushed out of the heart in a direction that is nearly parallel to the platform. Since momentum must be conserved, the body and the platform recoil, and this recoil can be detected to provide information about the heart. For each beat, suppose that 0.050 kg of blood is pushed out of the heart with a velocity of +0.30 m/s and that the mass of the patient and platform is 80 kg. Assuming that the patient does not slip with respect to the platform, and that the patient and platform start from rest, determine the recoil velocity.
Using Newton's laws, Evaluate the magnitude of the normal force that the floor exerts on the chair.
An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.00-T field with his fingers pointing in the direction of the field.
You are on a spaceship that has discovered a giant artifact made by an alien civilization. what is the magnitude of the force of gravity on your ship from the semi-circle
A 55.8-kg high-school student hangs from an overhead bar with both hands. What is the tension in each arm when the arms make an angle of 38.00 o with respect to the vertical
What mass can it support in water before sinking. Two concentric spherical shells with uniformly distributed masses M1 = kg and M2 = kg are situated as shown . Find out the magnitude Find the magnitude of the net gravitational force on a particle ..
An amount of ideal gas is con?ned to a sealed box at one-half atmospheric pressure, i.e., 50.65 kPa. What is the new pressure of the gas in the smaller box
Looking out the window of a train you observe the passengers on a second train moving in the opposite direction at a constant velocity. determines which of the two trains is actually moving
In 6.00 days the number of radioactive nuclei decreases to one-eight the number present initially. What is the half-life (in days) of the material
You decide to drop a bar made of a steel cylinder (Y = 6.0 × 1010 Pa) from a height of 1.20 m, what is the maximum compression of the bar
Two charged spheres are 8.45cm apart. They are moved, and the force on each of them is found to have been tripled. How far apart are they now.
Rank the magnitudes of the forces exerted on the following particles from largest to smallest. In your ranking, display any cases of equality. (Use only ">" or "=" symbols. Do not contain any parentheses around the letters or symbols.)
The magnitude of the electrostatic force between two identical ions that are separated by a distance of 0.90 nmis 4.103×10-8 N, How many electrons are missing from (or have been added to) each ion
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