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A heating element in a stove is designed to dissipate 2810 W of heat when it is connected to 200 V. Assuming that the resistance is constant, compute the current in this element if it is connected to 115 V.
Compute the power the heating element dissipates at this voltage.
A 0.5 kg block of ice is sliding by you on a very slippery floor at 2.5m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with ice block for 0.0025 seconds.
A child sits on the edge of a spinning merry-go-round that has a radius of 2.2 m. The child's speed is 4 m/s. What is the child's acceleration
A 200-g mass resting on a horizontal frictionless surface is attached to a spring of spring constant 35 N/m. What is the angular frequency of the oscillations
A wheel, originally rotating at 126 rad/s undergoes a fix angular deceleration of 5.00 rad/s2. Find what is its angular speed after it has turned through an angle of 628 radians
A camera lens is initially set at f/16 for a shutter speed of 1/160s. what is the proper shutter speed at this setting
Race car teams will spend exorbitant money to gain even the slightest edge on their competition. calculate its percent change in moment of inertia
To fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the cornea-the front surface of the eye. Determine the radius of curvature of the cornea
When a pin of mass 0.140 g is dropped from a height of 0.50 m, 0.05% of its energy is converted into a sound pulse by duration of 0.1 s. For both questions below, suppose that the intensity is I=P/4pir^2.
A uniform beam having a mass of 60 kg and a length of 2.8 meter isheld in place at its lower end by a pin. Its upper end leansagainst a vertical frictionless making an angle of 40 degrees withthe horizontal. What is the magnitude of the force by t..
the index of refraction for red light in water is 1.331 and that for blue light is 1.340. a ray of white light enters
A cylinder is rotating about an axis that passes through the center of each circular end piece. The cylinder has a radius of 0.0550 m, Find the magnitude of the angular deceleration of the cylinder
A hot-air balloon is ascending at the rate of 12 m/s and is 98 m above the ground when a package is dropped over the side. How long does the package take to reach the ground
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