Physics Work,Power & Energy Level: Misc Level
A 1.5-kg box that is sliding on a frictionless surface with a speed of 12 m/s approaches a horizontal spring. The spring has a spring constant of 2000 N/m, (a) How far will the spring be compressed in stopping the box?(b) How far will the spring be compressed when the box,s speed is reduced to half of its initial speed?
Physics Work,Power & Energy Level: Misc Level
A skier coasts down a very smooth, 10-m- high stope. If the speed of the skier on the top of the slope is 5.0 m/s, what is his speed at the bottom of the slope?
Physics Work,Power & Energy Level: Misc Level
The gravitational potential energy of a 2.0 kg object, near the surface of the Earth, has decreased by 10J, Which of the following can you determine with this information?please explain your answer.
a.the initial height of the object.
b.the final height of the object.
c.both the initial and final height of the object.
d.the difference between the initial and final height Can you explain what has physically happened to the object in this scenario?
Physics Work,Power & Energy Level: Misc Level
A big car of mass 2 m travels at speed v, and a small car of mass m travels with a speed 2 v, Both skid to a stop with the same coefficient of friction.
a.The small car will have;
1.a longer stopping distance
2.the same stopping distance
3.a shorter stopping distance
b. Calculate the ratio of the stopping distance of the small car to that of the large car. (Use the work-energy theorem, not Newton,s laws.)
Physics Force & Laws Of Motion Level: Misc Level
A 3.0-g bullet traveling at 350 m/s hits a tree and slows down uniformly to a stop while penetrating a distance of 12 cm into the tree,s trunk. What was the force exerted on the bullet in bringing it rest?
Physics Wave Optics Level: Misc Level
Wave phenomena Consider waves incident on an obstacle. There will be a significant shadow region if;
a)wavelength>> object size
b)wavelength equal to object size
c) wavelength <<object size
Physics Waves And Oscillations Level: Misc Level
Vibrating Air Colunns Consider a closed 30.0 cm long organ pipe .What is the frequencey of the 2 nd overtone when the speed of sound is 33 6 m/s?
Physics Circular Motion Level: Misc Level
Find the centripetal force of a 10-kg mass traveling at 4.0 m/s on a curve radius of 3.0 m. (I used the following form is it right? Fc=m V th the 2 power/r)
Physics Measurements Level: Misc Level
Find the weight of a 5.5 slug safe.
Physics Work,Power & Energy Level: Misc Level
Find the kinetic energy of 75-kg car that traveled 800 m in 50 seconds.
(i used KE =1/2 mxspeed to the 2 power)
Physics Kinetic Theory Of Gases Level: Misc Level
Find the original temp of a gas in degrees celsius if the gas was moveed from a 75 cubic centimeter tank to a 225 cubic centimeter tank with temperature of 123 degrees Celsius.
Physics Kinetic Theory Of Gases Level: Misc Level
750 m1 of a gas at 127 degrees Celsius and 800 mm Hg would occupy what volume at STP?
Physics Kinetic Theory Of Gases Level: Misc Level
How great a temperature change occurs for a gas at 350 mm Hg and 220 L if it occupied 500 L at 0 degrees C and 700 mm Hg?
Physics Kinetic Theory Of Gases Level: Misc Level
What is the final temperature in Celsius of a gas occupying 3.25 L at 750 mm Hg if it occupied 2250 mL at 37 degrees C and 600 mm Hg?
Physics Kinetic Theory Of Gases Level: Misc Level
A gas occupies 60 L at 250 degrees K and 1 atm. what is the volume degrees C and 1.5 atm?
