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A river of width 31 m flows in a straight line (the x direction) with a speed of 0.21 m/s. A boat is rowed such that it travels directly across the river (along y). If the boat takes exactly 3.0 minutes to cross the river, what is the speed of the boat relative to the water?
a mixture of ch4 methane and c2h6 ethane weighs 68.00 grams and it is burned in with oxygen fuel. the products formed
a catalyst decreases the activation energy of a particular exothermic reaction by 38 kjmol to 56 kjmol. assuming that
the distribution ages for students at the state college is positively skewed with a mean of 21.5 and a standard
on a distant planet golf is just as popular as it is on earth. a golfer tees off and drives the ball 4.7 times as far
given the following equation heat cal g x ?tdegc x specific heat and that the heat of water is 1.00 calgdegc.a metal
two small nonconducting spheres have a total charge of 94.8 uc. when placed 1.10 m apart the force each exerts on the
the edge length of the unit cell of potassium metal k is 533 pm the unit cell is body-centered cubic one atom at each
a cylindrical cable with 2.49 x 10-8 m resistivity carries a current of 1500 a. there is a potential difference of 1.8
a resister is connected to a 4.50 volt battery and the current flow is 83 ma. a. what is the resistance of the
in 1992 an ice palace estimated to be 4.90 x 106 kg was built in minnesota. despite this sizable mass this structure
a guitar string is under a tension of t 198n. the string has a mass of m 99g and length l. when the string is
A textbook of mass 2.10kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.190m, What is the tension in the part of the cord attached to the book
chameleons catch insects with their tongues which they can rapidly extend to great lengths. in a typical strike the
The angular speed of a propeller on a boat increases with constantacceleration from 10.9 rad/s to 24.0 rad/s in 2.20 revolutions. What is the acceleration of the propeller
A solid wood door 1.00m wide and 2.00m high is hinged along one side and has a total mass of 43.0kg. Find the angular speed of the door
A small object with a mass of 380 mg carries a charge of 35.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are separated by 5.00 cm. If the thread makes an angle of 12.0° with the vertical, ..
a projectile fixed vertically up from a canon rises 200m before returning to the ground. if the same were to fire the
three point charges 1 mc 1 mc and -1mc are placed in three vertices of a square which has 2 m long sides. the picture
Given the mass of the rubber in the balloon is 1.40 g, what is the net vertical force on the balloon if it is let go, Calculate the buoyant force on a 2.00 L helium balloon.
Find the maximum weight for the car if the springs should be compressed no more than 4.2 cm when the car is at rest
1000 kg of seawater at 17.5 C and salinity of 3 percent is mixed with 500 kg of pure water with initial temperature 5 C, Determine the final temp C and salinity % of the mixture?
A 500? resistor and a 240mH inductor are connected in series with an ac generator with an rms voltage of 17.0V, compute the rms current in this circuit
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