what was the dollar amount of the gold that could have been extracted from 3.0 m3 of seawater?

The pressure on Earth's atmosphere as a function of height y above sea level can be determined by assuming g to be constant and that the density of air is proportional to the pressure, i.e., px P. Note that this assumption is not very accurate since temperature and other weather effects can influence pressure. [Hint: Po = 1.013 × 105 N/m², po = 1.29 kg x m-³] (1) Start by finding a relation between the pressure Po and the density of air po at 0° at sea level (y=0) and the pressure P and density p at height y. Using this relation find an expression for p as a function of P, i.e., p = p(P). (2) Find the pressure as a function y. (3) At what altitude above sea level is the atmospheric pressure equal to half the pressure at sea level?

A piece of copper whose density is 8.93 g/cm3 has a mass of 180 g in air and 162 g when submerged in a certain liquid. What is the mass density of the liquid?

A homogeneous pulley with two grooves consists of two wheels which turn together as one around the same axis. The moment of inertia of the two wheels together is ICM = 40 kg m2. The radii are: R1 = 1.2 m and R2 = 0.4 m. The masses that hang on both sides of the pulley are m1 = 36 kg and m2 = 12 kg. We will assume that the masses of the ropes are negligible. Determine the angular acceleration of the pulley, acceleration of the masses, and the tensions of the ropes.

A dolphin is in ocean at a depth of 29.1 m. What is the absolute  pressure (in Pa) at this depth? The density of the water in the ocean is 1.00 ✕ 103 kg/m3, and the air above is at a pressure of 101.3 kPa.

A certain sample of metal has a mass of 3 kg and a volume of 250 cm3.  What is its density? A 50 gram bracelet is suspected of not being pure gold.  It is dropped into a glass of water and 4 cm3of water overflows.  Is the bracelet pure gold?  How do you know? What volume of copper has a mass of 7.5 kg?

What is the approximate mass of the air in our 10 m x 12 m x 4 m physics lab room? The density of the air is 1000 g/cm^3.

A tall graduated cylinder contains 7 cm of oil (density of 825 kg/m3kg/m3) on top of 20 cm of water (density of 1000 kg/m3kg/m3). The cylinder is open to the air. What is the pressure in the water, 3 cm above the bottom of the cylinder? (in Pa)  1.0323×105  1.0335×105  1.0353×105  1.0294×105  1.0157×105

A comic book scenario: you've been given a 316 g sample of what is claimed to be vibranium taken from Wakanda, which you know has a density of 583 kg/m3​3​​. To test this claim, you place the sample in water, which has a density of 1000 kg/m3​3​​. What fraction of the sample will be floating above the water if it is truly vibranium?

One side of a u-shaped tube is filled with a liquid of density (p1) while the other side contains a liquid of density (p2). which one of these is true if the liquids do not mix? a) p2=(h1/h2)p1 b) p2=(h2/h1)p1 c) p2=(h2-h1)p1 d) p2=(h1*h2)p1 e) p2=((h2+h1)/2)p1