Physics

You (m=80.0 kg) are in a rowboat (m=40.0 kg) of volume 0.300 m3. To answer the following, use the density of seawater as 10,050 N/m3. Before you step into the rowboat, how much water does the rowboat displace with nothing in it? What is the maximum load (excluding you and the boat) that you can take on before the rowboat sinks? If the rowboat was placed in a pool of mercury of weight density Dw = 1.36 X 105 N/m3, how much total weight (in lbs) could you put in the rowboat (including yourself) until it sank?

Estimate the total number of electrons in any molecule

If you remove all the electrons from a rain drop (diameter = 1 mm), what would be the gain in the electrostatic potential of the entire earth? Consider the radius of the earth to be R=6378.14 km. The answer clearly in by the simplest way illustrates the solution.

Greenhouse effect on Venus

To understand the magnitude of the greenhouse effect on Venus, calculate the equilibrium blackbody and subsolar blackbody temperatures of Venus. Compare these temperatures to the observed temperature of 750 K. Make a statement about the importance of the greenhouse effect. (b) Do the same for the Earth. Comment on the relative importance of the greenhouse effect for the Earth compared to Venus.

Atmospheric gas problem

(a) What would the temperature of the Earth's atmosphere have to be such thet the average speed of a hydrogen molecule(H2) is Equal to the Earth's escape velocity? What about an oxygen molecule(O2)? (b) It is thought that our atmosphere initially contained hydrogen molecules. Assuming the temperature of our atmosphere is 300K, and assuming the velocity distribution of the molecules in our atmosphere is a Maxwell distribution, estimate the fraction of hydrogen molecules that had a velocity greater than the escape velocity, and use this fraction to estimate the rate of hydrogen molecules escaping from Earth (assume the initial density of hydrogen equal to the current density of our atmosp... click for more

Temperature of water

In a nuclear submarine power plant, the temperature of the water in the reactor is above 100C. How is this possible? I believe it has to do with the cooling process of boiling water, but would like a little guidance. Thank you for your help!