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Assume a man is 2.0 m tall. what is the smallest height a rectangular plane mirror that will allow this man to see all of himself simultaneously? Think about multiple distances from the mirror and make sure you address the Law of Reflection in the answer.
Two electrons are fixed3.6cm apart. Another electron is shot from infinity and stops midway between the two. What is its initial speed
a 0.22 kg block of cheese lies on the floor of a 870 kg elevator cab that is being pulled upward by a cable through distance d = 2.3 m. how much work is done on the cab by the force from the cable
while in a third floor office building you notice a ball moving straight upward just outside the window. it takes 0.14
Two satellites are in circular orbits around a planet that has radius . One satellite has mass 88.0 , orbital radius 5.60×107 , and orbital speed 4800. What is the orbital speed of this second satellite
A 50-gram mass connected to a spring of force constant 35 N/moscillates on a horizontal, frictionless surface with an amplitudeof 4.0 cm. What is the total energy of the system?
A 110 g copper bowl contains 130 g of water, both at 24.0°C. A very hot 370 g copper cylinder is dropped into the water, causing the water to boil, How much energy (in calories) is transferred to the water as heat
The nucleus of a helium atom contains two protons. In a simple model of this nucleus, What is the electric potential energy of the two protons
A car is traveling around a banked curve. The angle of the curve is adjusted to be optimum for a velocity of 45 miles/hour. If the car goes around the curve at a speed of 30 miles/hour, which of the following forces will have to exist to allow the..
A gold nucleus contains 197 nucleons packed tightly against each other. A single nucleon (proton or neutron) has a radius of about 1.310-15 m. Calculate the approximate radius of the gold nucleus. (Hint: Remember that the volume of a sphere is (4/..
A man wants to swim across a river that flows N to S at 5 m/s.He can swim at a speed of 7m/s. how far south did he travel
A person exerts 200 J of work onto a 50 N crate while moving it 2 m. If the crate also undergoes 10 N of friction, the net energy for the crate is what
Compute the horizontal distance the ball
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