Thanks! I appreciate the response. Is an ammeter more accurate than a multimeter, or are they the same? Would measurement of DC currents be more accurate because they do not alternate like AC currents do?
In general, are the measurements of current or voltage more accurate?
From our lab experiments, it seems that voltage is more accurate. I'm curious as to why this is the case.
My guess is that because current itself is the measurement of the flow of the electric charges it would be more...
Homework Statement
A heat engine uses the closed cycle shown in the diagram: (Intro 1 figure) . The working substance is n moles of monoatomic ideal gas. Find the efficiency eta of such a cycle. Use the values for pressure and volume shown in the diagram and assume that the process between...
I guess I assumed that the net force was zero because of what my text has told me about hydrostatic pressure (static equilibrium with Fnet = 0).
If I attribute the pressure outside the tank to the upward forces...
Upward forces:
pA = (9 x 10^4 Pa)(2.35m^2) = 2.12 x 10^5 N
Downward forces:
mg...
Thanks for your reply. If the p_0 is just 140kPa, then the downward pressure would be 4.49 x 10^5 N? (Incorrect answer according to MP).
I was assuming that the tank is on the floor/ground of the building, since the question states: "Find the net downward force on the tank's flat bottom, of...
Homework Statement
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to gravity is 3.71 meters per second per second. The pressure at the surface of the water will be 140 kPa, and the depth of the water will be 13.8...
Homework Statement
A U-tube is filled with water, and the two arms are capped. The tube is cylindrical, and the right arm has twice the radius of the left arm. The caps have negligible mass, are watertight, and can freely slide up and down the tube. A one-inch depth of sand is poured onto the...
I guess I was confused by the way the problem was worded. But now that I think about it, it makes perfect sense: the pressure above (p_0) can be set equal to the pressure of the 10m and the surface of the water, plus (+) the weight of the next 10m (pgh). Thanks for the reality check!
Homework Statement
I'm trying to understand the concept of pressure in fluids.
The pressure at 10m below the surface of the ocean is about 2.00×10^5 Pa.
Now consider he pressure at 20m below the surface of the ocean.
This pressure is:
a) twice that at a depth of 10m.
b) the same as that at a...
Sorry, this is all new to me..
If the wood block is floating, then the buoyant force is equal to the weight of the block. But since the wood block with the added weight is now submerged under the water, then the weight of the block must be greater than the buoyant force? Or does the buoyant...
Homework Statement
A rectangular wooden block of weight W floats with exactly one-half of its volume below the waterline. Masses are stacked on top of the block until the top of the block is level with the waterline. This requires 20g of mass. What is the mass of the wooden block?
Homework...