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An 800kg roller coaster car is launched horizontally from a giant spring (k = 35 kN/m), rolls 10 m and them goes thru a vertical loop of radius 7 m. If for every meter the car rolls on the track, thermal energy increases by 800 J, would compressing the spring 3 m give the car enough energy to safely get to the top of the loop?
the siren on an ambulance is emitting a sound whose frequency is 2150 hz. the speed of sound is 343 ms.a if the
When 22.1 J was added as heat to a particular ideal gas, the volume of the gas changed from 37 cm3 to 60 cm3 while the pressure remained constant at 1.2 atm. By how much did the internal energy of the gas change
A guitar string is tuned to an E4, The concert pitch standard A440 has a frequency of 440 Hz. What is the wavelength of this pitch in air
Three point charges -q,-q, and 2q occupy the verices of an equilateral triangleof side a. Find the electric field at the center of the triangle
a ball moving at 5m/s collides head on elastically with a ball at rest. what are the velocities or the two balls after the collision
current passes through a solution of sodium chloride. in 1.00 second 2.68 x 1016 na ions arrive at the negative
A heat pump (a heat engine run backwards) extracts energy from cold air outside (-5.00 degrees celsius), Determine the amount of heat added to the inside air per joule of work done by the motor
A square loop of wire with sides of length 36.1 cm experiences a uniform magnetic field perpendicular to its area. find the magnitude of the average emf induced in the loop
The electron in a hydrogen atom is in a subshell with maximum angular momentum quantum number l=6. What is the number of states in this subshell
Seismic p-waves travel at abou 6 km/s and s-waves at 4 km/s. how far away was the earthquake that produced them
A banked circular highway curve is designed for traffic moving at 64 km/h. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road
You are twirling a tennis ball on a string in the vertical direction at a constant speed. The radius of the circle is 1.20m and the mass of the ball is 0.200kg. find the tension in the rope at the bottom of the swing
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