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Waves on a 10 meter rope travel at 20 m/s. You shake the rope back and forth until you get a standing wave with a single antinode. Shaking it faster, you are able to get another standing wave with two antinodes. What is the wavelength and frequency of each standing wave?
In a particular region of Earth's atmosphere, the electric field above Earth's surface has been measured to be 144 N/C downward at an altitude of 240 m and 177 N/C downward at an altitude of 390 m
A 28.9-g bullet is fired from a rifle. It takes 3.86 × 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
A uniform 3.15-kg rope 25.6 m long lies on the ground at the top of a vertical cliff. What was the change in potential energy of the rope during this maneuver
an object with a mass 2.70kg is executing simple harmonic motion, attached to a spring with spring constant k=280 N/m. What is the frequency of oscillation of the object
The magnetic field over a certain range is given by B= Bxi + Byj where Bx= 6T and By= 4T. What is the j component of the force
Find the distance from the mirror to the point where the reflected rays meet.
An engineer is designing a pacemaker for cardiac patients. For the 20 year old woman, how many times must device have to beat for her to have a normal life expectancy.
A 1.02mF capacitor is connected in series with an AC source with amplitude 50V and angular frequecy 40 rad/s. determine the amplitude of the current through this circuit
A sphere with radius 0.15m has density p that decreases with distance r from the center of the sphere according to p= 2.75*10^3 kg/m^3 - (9.5*10^3kg/m^4)r
Suppose an electron is accelerated from rest through a difference in potential of V = 4.6 V. Find the speed of the electron after the collision
A 47 microfarad capacitor is connected to a 9 volt battery. How many electrons is this charge equivalent to
If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 2.2 m on Earth, what would be his maximum range on the Moon, where free-fall acceleration is g/6 and g = 9.80m/s2.
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