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1. How does forced convection differ from natural convection?
2. We often turn the fan on in summer to help us cool. Explain how a fan makes us feel cooler in the summer. Also explain why some people use ceiling fans also in winter.
You (mass 90 kg) are a spyentering a high-security building through a skylight 20 m above thef loor. Your partner is lowering you on a rope (total mass 10 kg,total length 25 m) and you need to tell her when to stop lowering you. You can’t shout up to..
After the collision, the speed ofM1is reduced to 0.441 m/s, and it is moving to the left and downward at an angle of 32.0° with respect to the horizontal. You cannot assume that the collision is elastic. What is the speed of M2 after the collision..
two infinitely long charged cylinders are centered on the same axis. the inner cylinder of radius a3cm has a uniform
What is the magnitude of the force on the third wire? What is the direction of the force on the third wire? What is the direction of the force on the third wire?
6 J of work is needed to push an object of mass 2 kg from point A to point B of the frictionless inclined plane, What is the length s of the inclined plane
A large 50-turn circular loop of radius 10cm carries a current 4A. At the center of the loop is a small 20-turn coil of radius 0.5cm carrying current 1A. Find the torque exerted by the large coil on the small coil
A converging lens of focal length is being used with a writer as a magnifying glass to read some fine print on his book contract. Initially, the writer holds the lens above the fine print so that its image is at infinity. To get a better look, he the..
Parametric study on the effects of activated carbon by calcium chloride activation from bark of calamansi tree on sewage wastewater treatment.
When light of wavelength 380 nm falls on a cesium surface,electrons are emitted that have a maximum kinetic energy of 1.13eV. Find the work function of cesium
A robot probe drops a camera off the rim of a 239 meter high cliff on Mars, where the freefall acceleration is -3.7m/s^2. Determine the time required for it to hit the ground
An automobile with a mass of 940 kg goes around a curve with a radius of 64m.The coefficient of friction between the tires and the road is 0.700. Illustrate what is the maximum speed with which the car can go around the curve ?
A uniform electric field with a magnitude of 6*10^6 N/C is applied to a cube of edge length 0.1 m. what is the electric flux passing through the shaded face of the cube
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