Physics Properties Of Matter Level: Misc Level
The Mariana Trench, in the Pacific Ocean, is about 11.0 km deep.The acceleration of gravity is 9.81 m/s^2.If atmospheric pressure at sea level is 1.01x10^5 Pa and the density of sea water is 1.025x10^3 kg/m^3, how much pressure would a submarine need to be able to withstand to reach this depth? Answer in units of Pa.
Physics Properties Of Matter Level: Misc Level
A 79 kg woman balances on one heel of a pair of high-heeled shoes.The acceleration of gravity is 9.8 m/s^2. If the heel is circular with radius 0.438 cm, what pressure does she exert on the floor?
Answer in units of N/m^2.
Physics Measurements Level: Misc Level
A mmonium oxalate is used in the manufacture of explosives. It has density of 1.5 g/cm3. What is the mass of 450 cm3 of this substance?
Physics Current Electricity Level: Misc Level
If R1= R2=R3, what is the voltage across each resistor in terms of V battery?
Physics Current Electricity Level: Misc Level
If you have a 7 ohm resistor hooked up to a battery 9 V battery, how much current will flow through the resistor?How many electrons will flow through the resistor in one minute?
Physics Current Electricity Level: Misc Level
One company advertises that their holiday lights will stay lit if one bulb goes out, and another company with cheaper lights does not make this claim. What specifically is different about the way the two light strands are wired?Draw a picture of how the bulbs are connected together (think about series and parallel circuits).
Physics Electrostatics Level: Misc Level
A test charge is being acted on by force Fe. Write an expression for the electric field E in terms of electric force Fe and test charge q2. If Fe=5 N and q2=3.2 x10-19 C, what is E?
Physics Electrostatics Level: Misc Level
If you place a proton at point A in the electric field shown what will happen? What if you place an electron at point B? If you place a proton at location A and another at location B and then let go, which one, if either, accelerates more quickly? Explain.
Physics Heat & Thermodynamics Level: Misc Level
A steel aircraft carrier is 368 m long when moving through the icy North Atlantic at a temperature of 2.5%C. By how much does the carrier lengthen when it is traveling in the warm Mediterranean Sea at a temperature of 18% C?
Physics Heat & Thermodynamics Level: Misc Level
A thin rod consists of two parts joined together. One-half of it is silver and one-half is gold. The temperature decreases by 24 C% Determine the fractional decrease in the rod,s length using the formula above, where Lo, silver and Lo, Gold are the initial lengths of the silver and gold rods.
Physics Heat & Thermodynamics Level: Misc Level
A rod made from a particular alloy is heated from 23.5% C to the boiling point of water.Its length increases by 8.51x 10-4 m. The rod is then cooled from 23.5% C to the freezing point of water. By how much does the rod shrink? m.
Physics Kinematics Level: Misc Level
A punter kicks a punt 4.0 seconds later the punt return fields the punt 40 yards down field. Assume that he receives the ball at the same hieght that it was punted Find
a.Vxo
b.Vyo
c.Vo
Physics Kinematics Level: Misc Level
A mountain climber throws a stone straight down into a mountain pool 50 meters below. The stone has an initial velocity of 2 m/s straight down.
a. How long till the stone hits the water
b.Suppose he throws a second stone 1 second later. With what velocity would he have to throw the second stone if both stones hit at the same time.
Physics Kinematics Level: Misc Level
A is projectile is launched into the air with a velocity of 30 m/s at an angle of 30 from the horizontal. Assume the there is no friction and that the ground is level. Find vxo and vyo, the maximume height the projectile reaches,the distance it travels when it hits the ground, and the final velocity of (magnitude and direction)
Physics Rotational Mechanics Level: Misc Level
A rotating 5 kg solid flywheel (disk) has a radius of 50 cm and an angular velocity of 20 rads/second. The wheel is brought to rest and all of the rotational energy of the flywheel goes into heating a surrounding water bath.If the water temperature increases 0.2 degrees celcius, what is the mass of the water surrounding the flywheel?
