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What is the pressure in atmospheres on the body of a diver if he is 34 ft below the surface of the water when atmospheric pressure at the surface is 0.95 atm?
The nonstick polymer Teflon is made from tetrafluoroethylene, C2F4. if C2F4 is a gas that dissolves in water at 298 K to the extent of 1.01*10^-3 M with a partial pressure of 0.63 atm, what is the H
The head of a hammer (m=1.5 kg) moving at 4.5 m/s strikes a nail and bounces back with the same speed after an elastic collision lasting .075s. what is the magnitude of the average force the hamme
Assume up and right are positive. A mass m is placed on the stool at M=(x,y). Find the force through each leg supporting the mass in terms of x,y,g and m.
If a compressive force of 1,850.549 lbf is applied on a cross-section of a 20ft aluminum rod with a radius of 6.826mm, what will be the change in length and the final length of the rod due to the
What is the molar solubility of Q in a solution of NaX prepared by dissolving 1.98g of NaX in 150. mL of water?
Ben lets his toys slide down a 1.5m ramp at a 45 degree angle in a wooden box. The box starts out at rest, and speeds up as it goes down. Ben finds the acceleration to be 3.4 m/s^2. What is the coef
John carries one heavy box and kicks the other box so that it slides for a little bit and then stops, and he continues this until he reaches his destination. His kicks to the box have an accelerati
What is the net work done on the block while it is moving from point a to point b? Explain how you arrived at your answer. The block is moving at a constant velocity with a constant force in the pre
Say the electrical company needs to step down the voltage from 7200V RMS in the power line behind your house to the required 120V RMS. If they have a transformer with 1000 coil loops on the primary
A parallel plate capacitor has a capacitance of 10mF and its charge with a 20V power supply. The power supply is then removed and a dielectric of dielectric constand 4 is sused to fill the space bet
Brooks City has three consolidated high schools, each with a capacity of 1,200 students. THe school board has partitioned the city into five busing districts north, south, east, west and central eac
A 2.30 L sample of neon at 5.35 atm is added to a 10.0 L cylinder that contains argon. If the pressure in the cylinder is 7.00 atm after the neon is added, what was the original pressure (in atm) of
A certain light bulb is rated at 60 W when operating at the RMS voltage of 120 V. What is the peak voltage applied across the bulb?
Immediately after the collision, the 1.6 kg object has a velocity of 0.99 m/s directed 390 from its initial line of motion. What is the speed of the 0.86 kg object immediately after the collision
One second after the bug starts from rest, what is its total acceleration? What angle does this acceleration make with ac?
A bug is on the rim of a disk of diameter 14 in that moves from rest to an angular speed of 78 rev/min in 4.4 s. What is the tangential velocity of the bug at the end of the 4.4 s?
Derive the maximum number of independent Killing vector fields that can exist in a spacetime of dimension N . Compare the number of Killing vectors that exist in some of the metrics.
Calculate the elapsed time on Lucy's clock through this period of Susan's flight and compare this to those of Susan and Jane. Provide an explanation of the various elapsed times, and why they diff
Derive the equations of motion of this observer, and in particular derive equations that give the proper time, τ , of the observer and the radial coordinate of the observe, r.
Calculate elapsed time on the clocks of each of Jane and Susan, the difference in the times on the two clocks, and the maximum value of Jane's distance from the centre of the spherical object.
An air puck bounces back and forth between two parallel walls (always traveling perpendicular to the walls). Is the puck executing simple harmonic motion? Why or why not?
"We know that vmax = Aω. So if we know the position of a mass on a spring we can always get its velocity just by multiplying the position by ω." Point out the flaw in this student's a
Draw a position vs. time graph and a velocity vs. time graph for the puck. Make your axes reasonably accurate and show at least two cycles of the motion. What are the period and frequency of the mot
Spaceman speff orbits planet x with his spaceship. To remain in orbit at 556 km from the planets center, he should maintain a speed of 85 m/s. What is the mass of planet x?