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Q1. A small, plastic sphere of mass m = 98 g is attached to a string. There is an electric field of 112 N/C directed along the +x direction. If the string makes an angle θ = 30° with the y axis, what is the charge on the sphere?
Q2. Two 9.00 cm diameter charged disks face each other, 20.0 cm apart. Both disks are charged to - 80 nC.
What is the electric field strength at midpoint between two disks?
What is the electric field strength a point on axis 5.0 cm from one disk between them?
A train is travelling up a 4.40 incline at a speed of 3.30 when the last car breaks free and begins to coast without friction. How long does it take for the car to come to rest? How far does the car travel.
Two spherical objects have a combined mass of 200. The gravitational attraction between them is 8.01×10-6 while their centers are 21.0 apart.
A thin, flexible metal plate attached at one end to the platform, can be used to measure mass. When the free end of the plate is pulled down and released, it vibrates in simple harmonic motion with a period that depends on the mass attached to the pl..
Imagine that plane reaches the necessary takeoff velocity
Calculate the centripetal force on the motorcycle.
The equations of force and motion objective questions.
What is the potential difference measured by voltmeter
Find the work function of the emitting surface and the wavelength of the second source. Determine the net work done on the piano.
One sphere is negatively charged, with net charge -2.25 mu C, and other sphere is positively charged, with net charge 4.00 mu C. The charge is uniformly distributed within the volume of each sphere.
Light from a He-Ne laser (= 632.8) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.10 from the slits. The figure shows the interference pattern observed on the screen.
Soccer ball is kicked with a speed of 11.50 m/s at an angle of 30.0° above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air.
Giancoli, page 30 --when they say that x-xo increases with the square of the initial speed. Why do they say square of initial speed only, what about square of final speed? And why do they ignore that the distance also decreases by a factor of 2.
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