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Sheena can row a boat at 3.10 mi/h in still water. She needs to cross a river that is 1.11 mi wide with a current flowing at 1.77 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. a) What is her speed with respect to the starting point on the bank?
(a) How long does it take her to cross the river?
(b) How far upstream or downstream from her starting point will she reach the opposite bank? (magnitude and direction)
A 1200 kg car moving north at 27 m/s is struck by a 2165 kg car moving east at 11.0 m/s. The cars are stuck together. How fast and in what direction do they move at once after the collision.
Determine the distribution of charge which is responsible for creating this electric field. Hint: consider a Gaussian surface which is a cylinder of radius R
a charge q1 q is positioned on the x axis at x a. where should a charge q2 9q be placed to produce a net electric
Assume a rocketship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight. Estimate the time required by a rocketship to attain the speed of light and the distance travelled t..
A 2.20-mol sample of helium gas initially at 300 K, and 0.400 atm is compressed isothermally to 1.00 atm. Find the energy transferred by heat
You are standing on the ground at the origin of a coordinate system. Determine the magnitude and orientation of the airplane's position vector at t = 70.0 s
A brick of mass 1.19 kg is attached to a thin (massless) cable and whirled around in a circle in a vertical plane. The circle has a radius of 1.42 m. What is the maximum speed the brick can have
A 24.0 g copper ring at 0.000°C has an inner diameter of D = 2.54000 cm. An aluminum sphere at 103.0°C has a diameter of d = 2.54508 cm. What is the mass of the sphere
Starting at rest, two students stand on 12.5-kg sleds, which point away from each other on ice, and they pass a 5.50-kg medicine ball back and forth, How fast is the student on the right moving right after catching the ball
A rocket takes off vertically from the launchpad with no initial velocity but a constant upward acceleration of 2.25 m/s2. What is the maximum height the rocket will reach above the launchpad
an inductor that has a resistance of 40 ohm is connected to an ideal battery of 224V. Calculate the inductorace
Inductors in parallel. Two inductors L1 = 1.34 H and L2 = 2.20 H are connected in parallel and separated by a large distance so that the magnetic field of one cannot affect the other. Calculate the equivalent inductance
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