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Q. How many 109 W lightbulbs can you use in a 134 V circuit without tripping a 12 A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each lightbulb is 134 V.)
Q. An artillery shell is fired with an initial velocity of 300 m/s at 45.0° above the horizontal. To clear an avalanche, it explodes on a mountainside 39.0 s after firing. What are the x and y components of the shell where it explodes, relative to its firing point?
x = 1 m y = 2 m
explain the shape of the distribution of sample means.
A charge of -2.2×10-9 C is at the origin and a charge of 6×10-9 C is on the x-axis at x = 3m. At what two locations on x-axis (xpositive, xnegative) is the potential zero.
As part of a safety investigation, two 1900 cars traveling at 23 are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.5 to stop, and (b) car that hits a concrete barrier and ta..
A projectile is launched from the top of a cliff above level ground. At launch the projectile is 35 meters above the base of the cliff and has the velocity of 50 meters per second at an angle 37° with horizontal. Air resistance is negligible.
A vertical scale on a spring balance reads from 0 to 160 N. The scale has a length of 12.5cm from the 0 to 160 N reading. A fish hanging from the bottom of spring oscillates vertically at the frequency of 2.30 Hz. ignoring the mass of the spring, wha..
A barbell consists of two small balls, each with mass 600 grams (0.6 kg), at the ends of a very low mass rod of length d = 20 cm (0.2 m). The center of the barbell is mounted on the end of a low mass rigid rod of length b = 0.3 m, and this rod rot..
find coefficient of kinetic friction between m1 and shelf.
Find the flow rate of sludge and thickened sludge, salt concentration, water flow rate and pumping rate of a reservoir.
Two radio antennas are separated by 1.20m. Both broadcast identical 750 MHz waves. If you walk around the antennas in a circle of radius 20m, how many maxima will you detect.
Introductory Mechanics: Calculate the smallest coefficient of static friction
Consider a large parallel plate capacitor with circular plates of radius R. suppose that the electric field between the plates is increasing.
On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts an 8020-N force on the plane, focussed upward at the angle of 55.0° above the horizontal. The plane rises with constant velocity in the vertic..
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