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Crate that weighs 20 Newton starts from rest and slides down a rough 5.0 meter long ramp inclined at 25o with the horizontal during this slide 20 Joule of energy is lost due to friction. Evaluate the kinetic force on the crate? Evaluate the speed of the crate at the bottom?
question when resistence of 2 ohm is connected across the terminals of a cell the current is 0.5 ampere when resistence
An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 480 kg and a maximum acceleration of 2.24 m/s2. Engineering safety standards require that the cable tension never exceed two-thirds of the breaki..
A girl with a mass of 47.1 kilogram running at a speed of 6.58 m/s jumps onto a stationary skateboard with a mass of 8.99 kilogram. Find what is their combined speed after the collision
Assume that electron-hole pairs are injected into n-type GaAs (Eg = 1.42 eV, mc = O.O7m0, mv= 0.5m0,) at a rate R = 1O^23 per cm3 per second. The thermal equilibrium concentration of electrons is n0 = 10^16 cm^3. If the recombination coefficient r..
The block slides across a smooth surface once it leaves thespring and then up a ramp. It travels up the ramp adistance of 275 cm What is the elevation angle of the ramp
A thin, horizontal copper rod is 1.10 m long and has a mass of 203 g. What is the minimum current in the rod
How many 112 W lightbulbs can you use in a 100 V circuit without tripping a 15 A circuit breaker? (The bulbs are connected in parallel, that means that the potential difference across each lightbulb is 100 V.)
A house has a floor area of 200 m2 and an outsidewall that has an area of 50.0 m2. The earth's magneticfield here has a horizontal component of 2.65E-5 T that points duenorth and a vertical component of 4.22E-5 T that points straightdown, toward t..
A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 290 kg) that is also at rest. Determine the velocity of the second log if the lumberjack comes to rest on it
a revolving car wheel has a radius of 15m and a mass of 3 X 10^4 kg. what torque needs to be applied to stop the car wheel in 15 sec
A proposed ocean thermal-energy conversion (OTEC) system is a heat engine that would operate between warm water (26°C) at the ocean's surface, What is the maximum possible efficiency of the system
is any work done when moving a charge along a field line?a. yes the field does positive work when a positive charge
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