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A juniper-wood plank measuring 0.22 ft by 1 ft by 12 ft is totally submerged in water.
a) What is its weight?
b) What is the buoyant force acting on it?
c) What is the size of the net force on it?
A beam contains 8.1x106 doubly charged positive ionsper cubic centimeter, all of which are moving north with a speed of 7.3x105 m/s. What is the magnitude of the currentdensity?
A constant force is applied to a 5 kg object over a distance of 4 meters. If all of this work is converted to kinetic energy, what force is required for the object to reach 1.5 m/s from an initial state of rest
A tuning fork vibrating at 511 Hzfalls from rest and accelerates at 9.80 m/s2. How far below the point of release is the tuning fork
A very large number (N+1) polaroids are arranged in a sandwich, The transmission axis of each polaroid is at a constant angle, with respect to its predecessor
a bar of 24-karat pure gold is supposed to be completely solid. to check this a scientist takes the bar into the lab.
An unstable particle having mass of 5.00x10^-27 kg is initially at rest. Find the rest masses of the fragments
A 0.6410-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later, you notice that the ice cube has completely melted into a puddle of water.
When light with a wavelength of 228 nm is incident on a certain metal surface, Determine the wavelength of light that should be used to double the maximum kinetic energy of the electrons ejected from this surface
A 251 kg wooden raft floats on a lake. When a 70kg man stands on the raft, it sinks 4cm deeper into the water. When he steps off, the raft vibrates for a while.
we have a parallel plate capacitor separation of 0.2mm capacitance C0= 21 nF we fill it with 20g of silicone oil & density 520 kg/m^3, find the max charge on the plate before dielectric breakdown
Determine how much pressure is required to pump blood from the heart through the cerebral arteries into the brain
Time intervals measured with stopwatch typically have anuncertainty of about 0.2s, What is the percent of a hand timed measurement of a. 5.0s b.50s c 5min
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