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A 60 W light bulb is 30% of the electric energy is converted to light energy.
1. How many joules of thermal energy does the light bulb use each minute?
2. How many joules does the light bulb convert into light each minute it is in operation?
During normal beating, the heart creates a maximum 3.50 mV potential across 0.290 m of a person's chest, What is the wavelength of the electromagnetic wave
q1. a person can jump a maximum horizontal distance by using a 45 degree projectile angle of 5 m on earth. the
An elevator car of mass 780 kg falls from rest 3.10 m, hits a buffer spring, and then travels an additional 0.390 m, What is the force constant of the spring
A person pushes a 16.2-kg shopping cart at a constant velocity for a distance of 27.5 m on a flat horizontal surface. She pushes in a direction 32.3 ° below the horizontal. A 35.3-N frictional force opposes the motion of the cart. (a) What is the mag..
The generator in a purely inductive AC circuit has an angular frequency of 120π rad/s. IfΔVmax = 132 V and L = 0.130 H, what is the rms current in the circuit?
The skateboarder in the drawing starts down the left side of theramp with an initial speed of 6.47 m/s. If non-conservative forces,such as kinetic friction and air resistance, are negligible, what would be the height h of the highest point reached..
In attempting to jump start a car of mass 1100kg, two brotherseach push with an equal force of magnitude 670N parallel to thecar's velocity. Find the friction force that acts on the car
The log has a mass of m = 919 kg; the truck has a mass of M = 8550 kg. According to the truck manufacturer, Calculate the minimum coefficient of static friction
A seagull flies with a velocity of 12.5 m/s straight into the wind. (ie.. this the velocity of the gull relative to the wind), Calculate the speed of the wind
A ferris wheel at a carnival has a radius of 8 meters and rotates once every 15 seconds. A 10:1 scale model of the ferris wheel also rotates once every 15 seconds. Which has a higher angular velocity?
One particle has a mass of 3.00 10-3 kg and a charge of +8.40 µC. A second particle has a mass of 6.00 10-3 kg and the same charge. Find the initial separation between the particles
The position of an object as a function of time is (3.2t + 1.8t^2)i + (1.7t + 2.4t^2), Find the magnitude and direction of the object
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