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A small fan pulls the air in and forces it through the resistorswhere it is heated. If the density of the air is 1.2 kg/m3 at theinlet and 1.05 kg/m3 at the exit, determine the percent increase inthe velocity of the air as it flows through the dryer.
A plastic block of dimensions 2.5 cm x 3.8 cm x 4.0 cm has a mass of 28.0 g. What is the density of the block? If placed into a cup of water, will the block float or sink
q1. an iron bolt of mass 65.0 g hangs from a string 32.0 cm long. the top end of the string is fixed. without touching
A 70 ohm lamp and a 75 ohm lamp are connected in series and placed across a potential of 41 V. What is the voltage drop across the first lamp
A wire is stretched between two posts. Another wire is stretched between two posts that are four times as far apart. The tension in the wires is the equal, and they have the same mass.
On a banked race track, the smallest circular path on which cars can move has a radius of 120 m, while the largest has a radius 155 m, Find the smallest speed at which cars can move on this track without relying on friction
Find the mechanical energy of a block-spring system having a spring constant of 0.67 N/cm and an oscillation amplitude of 1.5 cm
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.180g and a charge of magnitude q. Find the tension in each of the threads
In 13.6 s, 220 bullets strike and embed themselves in a wall. What is the average change in momentum per second for the bullets
In a certain experiment, a radio transmitter emits sinusoidal electromagnetic waves of frequency 105.0 in opposite directions inside a narrow cavity with reflectors at both ends, How far apart are the nodal planes of the magnetic field
Two people, one at each end of a uniform beam that weighs 400N hold the beam at an angle of 25 degrees to the horizontal
An archer puts a 0.26 kg arrow to the bowstring. An average force of 213 N is exerted to draw the string back 1.3 m. unless otherwise directed, suppose that air resistance is negligible. Illustrate energy bar graphs to solve the problem.
Two mirrors form a vertex with an angle of 128°. If a ray of light strikes mirror 1 with an angle of incidence of 48°, find the angle of reflection of the ray when it leaves mirror 2
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