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In 1957, Sir Hermann Bondi(Emeritus Professor and former secretary of the Royal Astronomical Society) suggested that mass might be negative as well as positive.
Debate this idea and its consequences, based on both the Newton's Second Law of Motion and Newton's Law of Gravitation.
Although the cross-sectional area of a capillary is much smaller than that of the aorta, there are many capillaries, so their total cross-sectional area is much larger. calculate the total cross-sectional area of the capillaries
a 1.5 cm diameter suction cup is pressed to the ceiling. a 51kg weight hangs from the center of the cup by string neglect the mass of the suction cup and string. find the normal force on the suction cup
A ball is shot from a compressed air gun at twice its terminal speed. Find the magnitude of the balls initial acceleration, as a multiple of g, if it is shot straight up
Rumor has it that a photographic camera on a spy satellite can read the license plate of an automobile on the ground. what must be the diameter of the aperture of the camera
A projectile is fired with an initial speed of 65.2 m at an angle of 34.5? above the horizontal on a long flat firing range. find The maximum height reached by the projectile
When ultraviolet light of wavelength 2.54*10-5 cm and intensity 0.5 mW/cm2 form a mercury arc falls upon a clean copper surface, the stopping potential necessary to stop the emission of the photo-electrons is 0.59 V.
a 2.0kg object is attached to a spring k 60.0nm that hangs vertically from the ceiling.the object is displaced 0.050m
An 76.5 kg fullback moving east with a speed of 5.7 m/s is tackled by a 89.0 kg opponent running west at 2.74 m/s, and the collision is perfectly inelastic. Calculate the velocity of the players just after the tackle
The person in the drawing is standing on crutches. Assume that the force exerted on each crutch by the ground is directed along the crutch, determine the largest angle
Suppose that three astronauts outside a spaceship decide to play catch. All three astronauts have the same mass and are equally strong. How long will the game last
A 5.0 kg box is raised from rest a distance of 6.0 m by a vertical force of 110 n. Find the final kinetic energy of the box
my kids came up with a form of tether ball where they attached a ball to a string and let it swing around the role.
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