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Point P is at a potential of 540 kV and point S is at a potential of 250 kV. The space between these points is evacuated. When a charge of +2.81e moves from P to S, by how much does its kinetic ene
A 75 g bungee cord has an equilibrium length of 1.2 m. The cord is stretched to a length of 1.8 m, then vibrated at 20 Hz. This produces a standing wave with two antinodes. What is the spring const
Their data show that standing waves exist at frequencies of 64 Hz and 80 Hz, but at no frequencies in between. What is the value of g, the free-fall acceleration, on Planet X (in m/s^2)?
The spring constant is 27 N/m. When the ice cube is released, what distance will it travel up the slope before reversing direction?
A 122-cm-long, 5.00 g string oscillates in its n = 3 mode with a frequency of 190 Hz and a maximum amplitude of 5.50 mm. What is the wavelength in this string (in meters)? What is the tension in th
What are the three longest wavelengths for standing waves on a 300-cm-long string that is fixed at both ends (in meters)? If the frequency of the second-longest wavelength in part a is 45.0 Hz, wha
Find the magnitude of the electric field. Use 1.60×10-19 C for the magnitude of the charge on an electron and 1.67×10-27 Kg for the mass of a proton.
A proton is released from rest in a uniform electric field of magnitude 1.26x10^5 N/C. Find the speed of the proton after it has traveled (a) 1.60 cm and (b) 16.0 cm
Two coupled boxcars are rolling along at 3.5 m/s when they collide with and couple to a third, stationary boxcar. A) What is the final speed of the three coupled boxcars? B) What fraction of the car
A 53 kg sprinter, starting from rest, runs 55 m in 7.6 s at constant acceleration. What is the magnitude of the horizontal force acting on the sprinter? A) What is the magnitude of the horizontal fo
Suppose this electron is moving in a circular orbit of radius 0.32 nm (3.2 x 10-10 m) and the force that makes this circular motion possible is the electric force exerted by the proton on the electro
In a physics lab experiment, a spring clamped to the table shoots a 22 g ball horizontally. When the spring is compressed 22 cm, the ball travels horizontally 5.2 m and lands on the floor 1.5 m bel
With what minimum speed must you toss a 190 g ball straight up to hit the 10 m-high roof of the gymnasium if you release the ball 1.3 m above the ground? Solve this problem using energy. With what
A 55 g particle is moving to the left at 11 m/s. How much work must be done on the particle to cause it to move to the right at 41 m/s?
How much heat is extracted from the cold reservoir per cycle? (in J) Express your answer using two significant figures.
A Carnot engine with a hot-reservoir temperature of 380 degree C has the same thermal efficiency. What is the cold-reservoir temperature in degree C.
If you had one of the proton , in a uniform electric field, in a vacuum chamber near the earth's surface (so that you cannot ignore gravity), what electric field would be required to give the partic
A newly proposed device for generating electricity from the sun is a heat engine in which the hot reservoir is created by focusing sunlight on a small spot on one side of the engine. The cold reserv
Assume the room temperature is 20°C. A) What is the highest frequency heard by a student in the classroom? (in Hz) B) What is the lowest frequency heard by a student in the classroom? (in Hz)
On the other hand, if the red car has a constant velocity of 42.0 km/h, they pass each other at x = 76.0 m. What are (a) the initial velocity (in km/h)
A taut rope has a mass of0.165kg and a length of3.80m. What power must be supplied to the rope in order to generate sinusoidal waves having an amplitude of0.100m and a wavelength of0.520m and trave
What is the net displacement of an element at a point on the string where two pulses are crossing, if the string is rigidly attached to the post?
A speaker at an open-air concert emits 600 W of sound power, radiated equally in all directions. What is the intensity of the sound 5.50 m from of the speaker?
A 60 kg skier leaves the end of a ski-jump ramp with a velocity of 24 m/s directed 25 degrees above the horizontal.