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A jet lands at 14.8 m/s, applying the brakes 2.19 s after landing. Find the acceleration needed to stop the jet within 5.89 102 m
A container holds 2.9 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.1x10-3 kg bullet with a speed of 750 m/s
Suppose a 7.1 eV electron and a 9.77 eV positron collide, Find the frequency of these new photons
A 1,500kg Jeep is parked on a 30? slope, facing uphill (this is been done in right now in "Camp Jeep" en el Hiram Bithorn). Find the normal force exerted by the road on the front wheel
An advertisement claims that a centrifuge takes up only 0.127m of bench space but can produce a radial acceleration of 3000g (g= 9.8m/s^2) at 5000 rev/min
A wheel is rotating about an axis that is in the z-direction. The angular velocity is w = ?6.00 rad/s at t = 0, What is the angular displacement (change in angle) of the wheel at t = 7.00s
Suppose an electron is accelerated from rest through a difference in potential of V = 6.23 V. Find the speed of the electron after the collision
A helium weather balloon is used to lift a meteorological sensor package high up into the atmosphere. Calculate the number of moles of helium in the balloon
In space, an asteroid of mass 5,000 kg is hit by an object of mass 1000 kg and travelling at 1,000 m/s with respect to the asteroid. what will be the new speed of the asteroid
You sled down a hill of 45-m vertical height. The combined mass of you and your sled is 130kg. How much work was doen against friction during your decent
A spring with k=620 N/M is stretched with a tension of 40 N. What is the potential energy of the stretched spring
A 5-kg rock is dropped off a 30-m high building. If the rock is dropped from rest, what is the average power supplied by gravity
A 55-kg mass ice skater standing stationary on very slipper ice (negligible friction) throws a 0.45 kg baseball with a speed of 27 m/s in the horizonatal direction
Two Skaters collide and hold on to each other on a frictionless floor. find direction of the velocity of these skaters after the collision
A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.00 atm at 20.0oC. What is the mass of this piston
If a capacitor has the initial charge of 5.0uC, L = 0.080H, C = 10uF, and R = 0, What is the maximum energy stored in the inductor
A small coin, initially at rest, begins falling. If the clock starts when the coin begins to fall, what is the magnitude of the coin\'s displacement
a student ate a thanksgiving dinner that totaled 2400 cal. He wants to use up all that energy by lifting a 27 kg mass a distance of 1.0 m. How many times must he lift the mass
Bubba has a tuning fork with a frequency of 445 Hz. Assuming the speed of sound in his lab is 350. m/s, what length tube is required to find the resonant point of his fork
A window air-conditioner unit absorbs 9.70×104J of heat per minute from the room being cooled, What is the energy efficiency rating of the unit
A diesel engine performs an amount of mechanical work equal to 2800Jand discards an amount of heat equal to 4800J each cycle. What is the thermal efficiency of the engine
The speed of a 1kg object is 2.0m/s (+/-) .05m/s, meaning its absolute uncertainty is .5m/s, calculate the absolute uncertainty in the kinetic energy
A standard 100 (120 ) lightbulb contains a 7.80 -long tungsten filament. The high-temperature resistivity of tungsten is. what is the resistance of a household
A beam of light is incident on a glass plate ( = 1.62) in air and the reflected ray is completely polarized. What is the angle of refraction for the beam
The current in a 90.0-mH inductor changes with time as I = 1.00t2 %u2013 6.00t (in SI units). At what time is the emf zero