Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
A ball of mass 5.5 kg moving with speed of 1.8 m/s in the +x-direction hits a wall and bounces back with the same speed in the -x-direction. What is the change of momentum of the ball?
A hockey puck moving at 0.45 m/s collides elastically with another puck that was at rest. The pucks have equal mass. The first puck is deflected 37 degrees to the right and moves off at speed .36 m
in an industrial cooling process, water is circulated through a system. if the water is pumped with a speed of 0.45 m/s under a pressure of 400 torr from the first floor through a 6 cm diameter pipe
The mass of a paper clip is approximately
Airtight box has a removable lid of area 1.0 10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.85 105Pa. The inside of the box is completely e
A 131-kg sign hangs between two buildings by two cables. Cable 1 is attached at a 36 degree angle wrt to the horizontal, and Cable 2 is attached at a 24 degree angle wrt to the horizontal. What is
Two stationary positive point charges, charge 1 of magnitude 3.35 and charge 2 of magnitude 1.75 , are separated by a distance of 30.0 . An electron is released from rest at the point midway betwee
A 53.5-g Super Ball traveling at 26.0 m/s bounces off a brick wall and rebounds at 21.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.25 ms, what is the
A bucket filled with water has a mass of 48 kg and is attached to a rope that is wound around a 0.080 m radius cylinder. What torque does the bucket produce around the center of the cylinder?
A 35g sample of ethanol is dissolved in 115g water. What is the concentration of the ethanol, expressed as grams ethanol per 100g solution .
A cylindrical container 2.0 tall contains mercury to a certain depth. The rest of the cylinder is filled with water. If the pressure at the bottom of the cylinder is two atmospheres, what is the de
What minimum horsepower must a motor have to be able to drag a 320 box along a level floor at a speed of 1.10 if the coefficient of friction is 0.50?
A 1.00 kg ball strikes a wall with a velocity of 7.5 m/s to the left. The ball bounces off with a velocity of 2.0 m/s to the right. If the ball is in contact with the wall for 0.15 s, what is the co
An airtight box has a removable lid of area 1.1 multiplied by 10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.80 multiplied by 105Pa. The in
An aerobatic airplane pilot experiences "weightlessness" at the top of a loop-the-loop maneuver. If her speed is 200 m/s at the time, find the radius of the loop.
An extension cord made of two wires of diameter 0.129cm (no. 16 copper wire) and of length 2.7m (9ft) is connected to an electric heater which draws 15.0A on a 120-V line. How much power is dissipat
A 107.0 N grocery cart is pushed 14.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is t
A dentist uses a small mirror of radius 43 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 12 mm from the tooth, what is the magnification of the image?
A 3.0 {rm{ cm}} times 3.0 {rm{ cm}} parallel-plate capacitor has a 3.0 {rm mm} spacing. The electric field strength inside the capacitor is 1.1×105 {rm{ V/m}}. What is the potential differenc
A 1.97 kg mass is suspended from a string which is pulled upward. The mass accelerates upwards with an acceleration of 3.10m/s2. What is the tension in the string?
What are the magnitude and direction of the vertical force (use up as the positive direction) exerted by the pole on the firefighter?
A cosmic-ray proton in interstellar space has an energy of 16.5 MeV and executes a circular orbit having a radius equal to that of Venus's orbit around the Sun (1.08 1011 m). What is the magnetic fi
What is the maximum speed with which a 1060 kg car can round a turn of radius 75 m on a flat road if the coefficient of static friction between tires and road is 0.80?
A 72 {rm kg} person sits on a 4.0 {rm kg} chair. Each leg of the chair makes contact with the floor in a circle that is 1.2 {rm cm} in diameter. Find the pressure exerted on the floor by each leg o
A 320- piano slides 3.3 down a 24 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Determine the work done by the man on the piano.