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A constant horizontal force moves a 50 kg trunk 7.0 m up a 26° incline at constant speed. The coefficient ofkinetic friction between the trunk and the incline is 0.20.
(a) What is the work done by the applied force?
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(b) What is the increase in the thermal energy of the trunk and incline?
An airplane flying at a distance of 8.6 km from a radio transmitterreceives a signal of intensity 12 μW/m2. What isthe amplitude of the (a) electricand (b)magnetic component of the signal atthe airplane? (c) If the transmitterradiates uniformly over ..
Objects of equal mass are oscillating up and down in simple harmonic motion on two different vertical springs. The spring constant of spring 1 is 205 N/m. Find the spring constant of spring 2.
If random samples, each with n = 36 scores, are selected from a normal population with µ = 80 and ? = 18, how much difference, on average, should there be between a sample mean and the population mean?
selzer estimates the total cost of servicing the warranties will be $120,000 for 2 years. Estimate revenues earned on basis of costs incurred an estimated costs.
A water heater is operated by solar power. If the solarcollector has an area of 6.00 m2, and the intensitydelivered by sunlight is 550 W/m2, how long does it taketo increase the temperature of 1.00 m3 of water from20.0°C to 60.0°C?
A 395 turn circular loop coil 16 cm in diameter is initially aligned so that the axis is perpendicular to the earth's magnetic field. What is the magnitude of the earth's magnetic filed at this location
During a heavy rain, the drops are falling at a constant velocity and at an angle of 9.5° west of the vertical. What is your walking speed if the speed of the drops relative to the ground is 4.6 m/s
A long horizontal wire carries a current of 48 {rm A}. A second wire, made of 2.6 mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15 {rm cm} below. Examine the magnitude of the current in the lower wire.
A 23 kg child goes down a straight slide inclined 38 above horizontal. How large is the normal force of the slide on the child
a person's reaction time is generally not quick enough to allow the person to catch a dollar bill dropped between the fingers. If a typical reaction time in this case is 0.25 s
The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 7.00 s, Through how many revolutions does the tub turn while it is in motion
An object was weighted in water, oil and alcohol. Its loss of weight in water was 75.0 gr.-wt., in oil 49.0gr.-wt., and in alcohol 60.0 gr.-wt. Find the Specific Gravity of the oil and the alcohol
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