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A boat is able to move through still water at 20 m/s. It makes a round trip to a town 10 km upstream. If the river flows at 5m/s, what is the time required for this round trip? (give your answer in seconds)
Illustrate what is its average acceleration during a stop from that velocity? Express your answer in m/s2. Consider the car's initial velocity to be a positive quantity.
two point charges of 50 nc are each placed at the two vertices of an equilateral triangle of side 2.0 m. find the
A 2.16 kg solid sphere (radius = 0.120 m) is released from rest at the top of a ramp and allowed to roll without slipping. what is its total kinetic energy
one of your classmate has a friend with a boat. here is your classmate on water-skis being towed. what is the friction force of the water
A cannon tilted up at a 30° angle fires a cannon ball at 65 m/s, What is the ball's impact speed on the ground below
A 1.0-cm-thick layer of water stands on a horizontal slab of glass. What is the ray's direction of travel in the glass
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 1.89 106 m/s Find the centripetal acceleration of the electron.
on planet tehar the free-fall acceleration is the same as that on earth but there is also a strong downward electric
A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.25 kg to a friend standing in front of him. Calculate for the magnitude of the velocity of the student
Despite the divergence at x= 0, the Schrodinger Equation can be solved to find energy levels and wave functions for the electron in this potention. Draw a horizontal line across your graph of part a) about one-third the way from the bottom to the ..
A 14 nC point charge is at the center of a 1.6 m x 1.6 m x 1.6 m cube. What is the electric flux through the top surface of the cube
Sound pressure level (SPL) is an important parameter for the sound engineers. Often the designs of the architects are verified for the feasibility and the acceptance of the sound pressure.
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