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A 1.5kg rock is released from rest at the surface of a calm lake. If the resistance offereed by the water as ther rock falls is directly porportional to the rock's velocity, the rocks acceleration is a=g-C(d) v/m, where g is the acceleration fo gravity, C(d) is a constant drage coefficient, v is the rock's velocity, and the m is the mass of the rock. Letting C(d)=4.1kg/s, determeinder the rock's velocity after 1.8s.
An electron has an initial velocity of (15.0 j + 22.0 k) km/s and the constant acceleration of (3.00*10^12 m/s^22)i in a region in which uniform electric and magnetic fields are present. If B = (400 µT)i, find the electric field E.
What is the smallest number of whole logs (? = 725 kg/m3, radius = 0.0917 m, length = 3.10 m) that can be used to build a raft that will carry four people
Two uniform solid cylinders, each rotating about its central (longitudinal) axis, have the same mass of 1.25 kg, What is the rotational kinetic energy of the smaller cylinder
a log is floating on swiftly moving water. a stone is dropped from rest from a 79.1-m-high bridge and lands on the log
q1. a 2.60- metal bar 1.50 long and having a resistance of 10.0 rests horizontally on conducting wires connecting it to
How much work did the movers do (horizontally) pushing a 190-{rm kg} crate 11.2 m across a rough floor without acceleration, if effective coefficient of friction was 0.60.
two kilograms of water execute a carnot power cycle inside a piston-cylinder device. during isothermal expansion water
Apollo 14 astronaut Alan B. Shepard Jr. used an improvised six-iron to strike two golf balls while on the Fra Mauro region of the moon's surface, What is the numeric value of the ratio
Two resistors, of R1 = 2.93 ? and R2 = 6.69 ?, are connected in series to a battery with an EMF of 24.0 V, Find the current I1 through the first resistor
A worker is to paint the walls of a square room 8.00 fthigh and 12.0 ft along each side. What surface area in squaremeters must she cover
An electron approaches a potential barrier10 eV high and 0.30 nm wide. If the electron has a 2.0 percentprobability of tunneling through the barrier, what must its energy be
An inductor with L = 9.15mH is connected across an ac source that has voltage amplitude 45.5V. Does the source voltage lag or lead the current
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