Gravitational acceleration one third of the surface value
A uniform solid spherical planet of radius 4978000 m produces a gravitational acceleration of 8.9 m/s^2 on its surface. At what two distances from the center of the sphere is the gravitational acceleration one third of the surface value?
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Calculate the value a force must have to keep a 20 kg mass moving up a plane inclined at 34 degrees at a constant speed. Is there an angle for the plane at which no horizontal force can keep the mass moving at constant speed? if so, what is it?
Explain how two sets of data could have equal means and modes but still differ greatly. Give an example with two data sets to illustrate.
A new indicator dye, HIn, is to be tested for a pKa experiment. In .100 M acetate buffer (pH = 4.00), the dye is20% In- (base) and 80% HIn (acid). In other words, the pKa is4.60.
Determine the minimum power required to run this heat pump if heat is extracted from (a) The outdoor air at 25°F and (b) The well water at 50°F.
Suppose we have a group of 10 people, and I have $600 that I want to distribute to 3 of the 10 people. How many different ways can I give $200 to each of three people?
Calculate the volume of 2.44M sulfuric acid that would be needed to neutralize 45.3 mL of a 2.57 M aqueous ammonia solution. The equation for the reaction is?
Suppose there are five jars, and five stones are placed into the jars at random. What is the probability that no jar contains more than one stone?
Two identical diverging lenses are separated by 15 cm. The focal length of each lens is -8.0 cm. An object is located 4.0 cm to the left of the lens that is on the left. Determine the final image distance relative to the lens on the right.
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