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A Two balloons of identical volume (radius 11.5 m) are filled with gas. The first with helium, the second with hydrogen (H2) gas. Each balloon and cage have a mass of 750 kg. What is the lift created by each one? Which one lifts better?
A mass m attached to a spring with constant k (N/m).
An electron moves from the initial position r = (0.1m)I to final position r=(0.2m)j. what is the surface charge density (i.e. charge per area) on the inner surface of the conducting sphere
An electron has a speed of 0.750c. Find the speed of a proton that has the same kinetic energy as the electron
Find an expression for the loop's velocity as a function of time as it enters the magnetic field. You can ignore gravity, and you can assume that the back edge of the loop has not entered the field
A Carnot engine operates between temperatures of 747 and 324 K. Calculate what the efficiency would be if (a) the temperature of the hot reservoir were raised by 42.5 K or (b) if the temperature of the cold reservoir were lowered by 42.5 K. (Give ..
When a particle is at the origin, it has a velocity given by vo = (12i + 15j)ms-1. How long does it take the particle to hit the y-axis
A beam of hydrogen molecules (H2) is directed toward a wall, at an angle of 58° with the normal to the wall. What is the beam's pressure on the wall
How much work is completed by the system in this process. Determine the increase in entropy produced by the parachutist; assume the air temperature is 21 degrees C. How much work is completed by the system in this process.
A soft iron bar is sitsting surrounded by two separate loops of wire. The loop on the left, L1, initially has a current flowing clockwise as viewed from the right, What will be direction of magnetic field in soft iron bar
A 2.0 mm-diameter glass bead is positively charged. The potential difference between a point 2.2 mm from the bead
An 63 kg weight watcher wishes to climb a mountain to work o? the equivalent of a large piece of chocolate cake rated at 690 kcal (1 kcal = 1000 cal). How high must the person climb
An air-track glider attached to a spring oscillates between the 12.0 cm mark and the 55.0 cm mark on the track. calculate the maximum speed of the glider
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