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You have two pennies that you throw upward from your hand 1.5m above the ground one after the other. The first penny is thrown upward with a speed of 20m/s.
Determine the acceleration due to gravity at that height and find the orbital velocity and the period of the space station.
Compare the resulting electrostatic repulsion with the gravitational attraction between the Moon and the Earth. (The mass of the Earth is 5.97 x 1024 kg, the mass of the Moon is 7.36 x 1022 kg, and
Very small losses, find a condition that relates the mechanical impedances of the supports at the ends of a bar of length L and longitudinal wave speed c if the bar is to have an integral number of
A bar of length L and mass M is fixed at one end and free at the other. What mass m is attached to the free end to decrease the fundamental frequency of longitudinal vibration by 25% from its fixed
A 2600 kg truck traveling north at 40 km/h turns east and accelerates to 55 km/h. (a) What is the change in the truck's kinetic energy?
A sample to be used for medical imaging is labeled with 18F, which has a half life of 110 minutes. What percentage of the original activity in the sample remains after 300 minutes?
You are given a solid that is a mixture of sodium sulfate and potassium sulfate. a o.205g sample of the mixture is dissolved in water. An excess of an aqueous solution of barium chloride is added. t
Two parallel circular plates with radius 7.0 mm carrying equal-magnitude surface charge densities of ±3.0 µC/m2 are separated by a distance of 1.0 mm. How much stored energy do the plat
A charge of 2.05 µC is uniformly distributed on a ring of radius 8.5 cm. Find the electric field strength on the axis at the following locations.
At 55degee centigrade,A has a vapor pressure of 95 mmHg and B has a vapor pressure of 42 mmHg . A solution is prepared by mixing equal masses of A and B.
what is the coefficient of kinetic friction between the block and the incline, and the frictional force acting on the block and the speed of the block after it has slod 2 m.
A quantity of 1.922g of methanol (CH3OH) was burned in a constant -volume bomb calorimeter. consequently, the temperature of the water rose by 4.20degree centigrade.
Determine the electric pontential V, relative to V=0 at r=∞, as a function of the distance r from the center for (a) r > r2, (b) r1 < r < r2 and (c) 0 < r < r1. Is V continious
If the balloon is filled with 2.0L of helium at sea level, is released and rises to an altitude at which the atmospheric pressure is only 500mm Hg, will the balloon burst?
Let the radius of the spherical cell be 50μm, the height of the cylindrical cell be 10μm, and assume that diffusion occurs across all surfaces of the cell.
A 5000 kg rocket is launched at a 44.7 degree angle. The thrust of the rocket motor is 140,700 N. a) Find an equation y(x) that describes the rocket's trajectory.
If they are to maintain the same energy expenditure rate, how much faster do they now have to breathe?
A person of a Haz Mat team will be working for 1.5 hr while breathing oxygen from a pressurized tank. While working, they will be burning energy at a rate of Cal/hr. The tank stores the gas at 20 MP
A 0.0100 g sample of Co(NH2CH2CH2NH2)3Cl3 is dissolved in 25.0 mL of water and the osmotic pressure of the solution is 87.9 mmHg at 25 degrees Celsius. How many moles of ions are produced per mole
It is surrounded by a concentric metal (conducting) spherical shell of inner radius r1 and outer radius r2, which carries net charge +Q. Determine the resulting electric field in the regions (a) 0&l
A 3. 00kg block starts from a rest at the top of a 34.5 degree incline and slides 2.00 m down the inclinein 1.20 s, what is the accelartion of the block.
A lead storage battery needs sulfuric acid to function. the recommended minimum concentration of sulfuric acid for maximum effectivity is approximately 4.8M A 10 ml sample of battery acid requires 6
A person is exercising, burning 350 Cal/Hr. While doing this exercise, they breathe deeply, so the volume they take into and out of their lungs is 2 L with each breath. 20% of the air inhaled is ox
If a 2.75 uC charged particle moving in the x-y plane experiences a net force of 4.35 * 10^-3 N in the +x direction, what is the speed and direction of the charged particle? What would the force on