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What are abiotic factors? Give examples of the major abiotic factors that influence where organisms live.
Two people, one of mass 75 and the other of mass 65 , sit in a rowboat of mass 89. How far will the boat move
The electric potential at x = 3.0 m is 120 V, and the electric potential at x = 5.0 m is 190 V. What is the electric field in this region, assuming it's constant? -140 N/C 140 N/C -35 N/C 35 N/C 75 N/C.
A baseball of mass 0.15 kilogram, moving horizontally with a momentum of 6 kg•m/s, is struck head-on by a baseball bat with an impulse of 10 Ns. Compute the speed of the ball after it is struck
Suppose a 32.3 V battery is connected to a long cylindrical wire, and a current of 2.44 A flows. Find the work done by this battery to push one electron through the entire length of the wire
The radioactive source in most smoke detectors is ^241Am, which has a half-life of 432 years. Suppose only about 0.130mg of this material is needed. Write down its alpha decay equation
Four 1.2 kg masses are located at thec orners of a square 0.80 m on eachside. Find the magnitude and direction of the gravitational forceon a fifth 1.2 kg mass placed at the midpoint of the bottom side of the square.
A space station, in the form of a wheel 133 m in diameter, rotates to provide an "artificial gravity" of 2.20 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of the wheel's rotation in revolutions per minute that wi..
a block of mass m slides down a frictionless plane inclined at an angle with the horizontal. the gravitational force is
In which one of the following circumstances could mechanical energy not possibly be conserved, even if friction and airresistance are absent? why?
A billiard ball A moving at 5.00m/s hits another ball B, initially at rest, of the same mass. Find the velocity (magnitude and direction) of the second ball after the collision
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. Find the magnitudes of the net force acting on the electron
Hot chocolate effect. Tap a metal spoon inside a mug of water and note the frequency fi you hear. Then add a spoonful of powder (say, chocolate mix or instant coffee) and tap again as you stir the powder. The frequency you hear has a lower value f..
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