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Question1
An 8.00 point mass and a 15.0 point mass are held in place 50.0 apart. A particle of mass is released from a point between the two masses 19.0 from the 8.00 mass beside line connecting the two fixed masses.
Question2
Assume the Sun is mostly composed of hydrogen atoms. Suppose the mass of the Sun is 1.61 × 1030 kg, and the mass of a hydrogen atom is 1.672 × 10-27 kg.
How many atoms are there in the Sun?
Question3
A 550n physics student stands on a bathroom scale an 850kg (including students) elevator that is supported by a cable. As the elevator start moving, the scale read's 450N.
(a)What is acceleration of the elevator? (b)What is acceleration of the scale read's 670N?
The image is located 3.5 cm from the mirror. (a) If the image is 4X larger than the object. Calculate the distance between the object and the mirror. (b) Calculate the focal length of the mirror.
A 35-kg child is holding for dear life on a playground merry-go-round that has a radius of 2.5m and is turning at a rate of one turn every 5 seconds. What's is the child's acceleration relative to the ground
In coming to a stop, a car leaves skid marks 77m long on the highway. Assuming a deceleration of 8m/s2, estimate the speed of the car just before braking.
A 3.0 kg block rests on a 30° slope and is attached by a string of negligible mass to a solid drum of mass 0.80 kg, What is the coefficient of friction between block and slope
Assume that, as lying on a beach near the equator watching the Sun set over a calm ocean, you start a stopwatch just as the top of the Sun disappears. You after that stand, elevating your eyes by a height H = 1.90 m.
A refrigerator has a surface area of 6.04 m2. It is lined with 0.0885-m-thick insulation whose thermal conductivity is 0.0300 J/(s m C °). How much heat per second is being removed from the unit
a ferris wheel has a radius of 11.0 m and rotates once every 11 s, what is the force of the chair seat on you
A net force of 32 N accelerates a 4.7-kg mass over a distance of 15 m. What is the total work done by this net force
Hail comes straight down at a mass rate of m/?t = 0.070 kg/s and an initial velocity of v0 = -14 m/s and strikes the roof perpendicularly. calculate the force exerted by the hail on the roof
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 28.9 m/s. Find the airplane\'s acceleration
n air-filled spherical capacitor is constructed with inner and outer shell radii of 7.00 and 14.0 cm, respectively. Calculate the capacitance of the device
A 40-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, kinetic energy decreases to 240J from 470J. How high does she rise during this interval? Avoid air resistance.
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