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A 1400 kg aircraft going 40 m/s collides with a 1500 kg aircraft that is parked and they stick together after the collision and are going 19.3 m/s after the collision. If they skid for 85.2 m before stopping, how long (in seconds) did they skid?
a 280 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. the ramp is inclined
In a physics demonstration, a stationary mass m1 = 0.20kg slides down a frictionless ramp and then collides with a second mass m2 = 0.40 kg. Find the height needed if you reverse the masses
Which of the following is not a valid criterion for the acceptance of a physical law or theory?
If a pitcher throws a baseball at 101 mi/h, how far would the ball fall vertically after traveling 66m horizontally
Two tiny conducting spheres are identical and carry charges of -20.7 μC and +51.7 μC. They are separated by a distance of 2.39 cm. What is the magnitude of the force that each sphere experiences?
two resistors have resistances rsmaller and rlarger where rsmaller lt rlarger. when the resistors are connected in
When an RLC series circuit is connected to a 120 V rms, 48 Hz line, the rms current in the circuit is 9.10 A and the current leads the line voltage by 45°. What is the resistance in the circuit
Two cannonballs, C and D, are fired from the ground with identical initial speeds, but (theta)a larger than (theta)b. Determine which cannonball reaches a higher elevation
A low-power laser used in a physics lab might have a power of0.50 mW and a beam diameter of 3.0mm. calculate the average light intensity of the laser beam
an air puck bounces back and forth between two parallel walls always traveling perpendicular to the walls. each time
Four charges are located in a plane as follows: q1 = -5 uC at (4,0) m; q2 = -3 uC at (4,4) m; q3 = -4 uC at (0,4) m; q4 = -2 uC at (0,0) m. Find the magnitude and direction of the resultant field at (2,2)
Brian is trying to pull Julie on a sled across a flat snowy field. Brian pulls on a rope attached to the sled. how much force must Brian exert on the rope to start moving the sled
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