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A 281 ball is tied to a string. It is pulled to an angle of 3.6 and released to swing as a pendulum. A student with a stopwatch finds that 26 oscillations take 18 .
How long is the string?
a rock weighing 98 n is thrown downward with a velocity of 20 ms from the top of a 140 m tall building. what is the
An evacuated spherical diving bell containing a camera is in the ocean at a depth of 143m. It has a flat, transparent, Find the magnitude of the total force on the port
a person's reaction time is generally not quick enough to allow the person to catch a dollar bill dropped between the fingers. If a typical reaction time in this case is 0.25 s
A particle moves along the x axis. It is initially at the position 0.330 m, moving with velocity 0.250 m/s and acceleration -0.280 m/s2. Find its velocity at the end of this time interval
A playground is on the flat roof of a city school, 4.6 m above the street below (see figure). The vertical wall of the building is h = 6.10 m high, forming a 1.5-m-high railing around the playground. Find the vertical distance by which the ball cle..
An electron is moving at a speed of 1.0 x10^4 m/s in a circular path of radius of 2.1cm inside a solenoid. The magnetic field of the solenoid is perpendicular to the plane of the electron's path. The solenoid has 25 turns per centimeter.
What was the initial speed of the arrow. A block with mass m = 19.7 kg slides down an inclined plane of slope angle 35.8 deg with a constant velocity. It is then projected up the similar plane with an initial speed 1.05 m/s. How far up the incline w..
A railroad car containing explosive material is initially traveling south at a speed of 4.5 m/s on level ground. The total mass of the car plus explosives is 2.5 104 kg. what is the final speed of the other piece
The magnetic field of an electromagnetic wave in a vacuum is Bz=(2.5 microT)Sin(1.9*10^7 x-2(3.14)ft), where x is in m and t is in s. What is the wave's electric field amplitude
Robert has just bought a new model rocket, and is trying to measure its flight characteristics. how much work is done by the drag force on the rocket during its ascent
n = 3.60 mol of Hydrogen gas is initially at T = 340 K temperature and pi = 3.32×105 Pa pressure, How much entropy did the gas emit
A 1200 crate slides 15 down a ramp that makes an angle of 30 with the horizontal. If crate slides at a constant speed, how much thermal energy is created?
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