Physics Force & Laws Of Motion Level: Misc Level
A force of 10 N is applied to a 5 kg mass for 2 sec on a frictionless surface. A) What is the velocity of the mass at the end of the acceleration period.
B) What is the kinetic energy of the mass at the end of the acceleration period.
C) The mass comes to a frictionless ramp with an angle of 35 degrees. How far along the length of the ramp will the mass slide before stopping.
Physics Relativity Level: Misc Level
You are traveling in a spaceship and you throw frisbee to captain Kirk. You measue that it takes 1.5 seconds for the frisbee to get from you to captain Kirk. If an observer on the moon measures that it took 1.7 seconds, how fast must your spaceship be going relative to moon.
Physics Electrostatics Level: Misc Level
You have two pith balls separated by a distance of 0.01 meters. Pith ball A has 340 extra electrons, and pith ball B has given up 76 electrons. Find the total charge on each pith ball. Then calculate the force on A and the force on B and draw arrows on a picture that indicates the magnitude and direction of these forces.
Physics Electromagnetic Waves Level: Misc Level
An object appears yellow if it reflects red and green light. An object appears magenta if it reflects red and blue light. Imagine you are wearing a yellow shirt and a magenta hat. if you go into a in which your magenta hat appears blue and your yellow shirt appears black. What color is the light in the room?
Physics Electromagnetic Induction Level: Misc Level
Two coils of wire are identical, except that coil A has twice as many turns as coil B. If the magnetic field increases with the same rate through both coils, how does the flux through each coil compare, how does the induced voltage compare?
Physics Waves And Oscillations Level: Misc Level
What is the wavelength when a person weighing 155 pounds is walking along at 3 miles per hour?
Physics Modern Physics Level: Misc Level
Imagine a photon strikes a metal plate that has a work function of Theta =3 x 10 to the - 19 power J. If the photon has an energy of 3.4 x 10 to the negative 18 power J, what is the maximum kinetic energy of the ejected electrons?
Physics Waves And Oscillations Level: Misc Level
A wave with speed of 5 m/s travels on a rope of length 1.5 meters. If tension in the rope is 20 newtons, what must mass of rope be?
Physics Waves And Oscillations Level: Misc Level
A string of length 1 meter is tied down at both ends. can the following waves be formed on the sstring? wavelength =1 /2 m, wavelength 2 /3 m, wavelength 2 m
Physics Electromagnetic Induction Level: Misc Level
A 20 loop circular coil of wire with radius 5 cm is placed in a constant manetic field B=2T. After 1 second, what is the voltage induced in the coil?
Physics Magnetism,Magnetic Effects Of Current Level: Misc Level
Two long parrallel power lines are separated by a sistance of 4 meters. They each carry a current of 10 A, but in opposite directions. what is the force on a 1 meter section of the wires?
Physics Modern Physics Level: Misc Level
A neutral Al ( aluminum ) atom has 13 electrons. What is the total charge of an aluminum atom that has 15 electrons?
Physics Current Electricity Level: Misc Level
A 2.5 ohm resistor is connected to a 2.2 volt battery. How much current will flow through the resistor?
Physics Modern Physics Level: Misc Level
if ther is an electric field pointing toward the east, in what direction does the electric force on an an electron point? If there is a magnetic field pointing toward the east and a proton is initially moving north, in what direction will the magnetic force on that proton point?
Physics Work,Power & Energy Level: Misc Level
A 1.20 kg box slides down a rough incline plane from a height h of 1.75 m. The box had a speed of 2.33 m/s at the top and a speed of 1.90 m /s at the bottom. Calculate the mechanical energy lost due to friction (as heat, etc).
