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A ball is whirled around in a horizontal circle of radius 0.4m. It's centripetal acceleration is 90 m/s2. Evaluate what is the speed of the ball in m/s?
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding arock. The total mass of the wagon, rider, and rock is 98.0kg. The mass of the rock is 0.300kg.
Each of two small spheres is positively charged; the combined charge totals 60.0 nC. A.) What is the charge on each sphere if the spheres are repelled with a force of magnitude 0.270mN when placed 0.100m apart?
Brian is trying to pull Julie on a sled across a flat snowy field. Brian puls on a rope attached to the sled. how much force must Brian exert on the rope to start moving the sled
A small object is placed to the left of a convex lens and on the optical axis. evaluate the position of the image formed by the lens
In the Compton effect, an X-ray photon of wavelength 0.31 nm is incident on a stationary electron. What is the wavelength of the scattered photon
A 2 micro-farad and a 5 micro-farad capacitors were connected inseries to a 12 volt battery. After the capacitors were fully charged, the battery was disconnected. The capacitors were connected in parallel. Find the charge on each capacitor in the..
skydiver jumps from airplane they will accelerate rapidly at first but air resistance prevents them from falling faster
A capacitor is used as energy storge device. the material between the plates of the capacitor has a certain resistance leading to a gradual slef-discharge. What is the fraction of the initial energy lost in the first hour
A 2.40-kg textbook is forced against a horizontal spring of negligible mass and force constant 300 N/m , compressing the spring a distance of 0.260m. find how far the textbook moves from its initial position before coming to rest
A 190-?F capacitor and a 80m H inductor are in series with a 105 ? resistor. What is the impedance at the resonant frequency
in april 2010 the worst oil spill until that time occurred when an explosion and fire on the deepwater horizon left 11
Two sound sources driven in phase by the same amplifier are 2.40 m apart on the y axis. What is the wavelength of the sound waves from the sources
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