What does the gravitational potential energy equal?
U=mgh
100
an electron moving in a uniform magnetic field experiences the maximum magnetic force when the angle between the direction of the electrons motion and the direction of the magnetic field is
90 degrees
100
as the wavelength of a photon increases, its momentum...
decreases
100
what process involves a larger nucleus splitting into smaller ones?
nuclear fission
100
the time required for light to travel a distance of 1.5 X 10^11 meters is approxamatly...
5 X 10^2 seconds
200
a student weighing 500 newtons stands on a spring scale in an elevator. if the scale reads 520 newtons the elevator must be...
accelerating upward
200
if the permability of the core of a magnet is increased, the strength of the magnet will...
increase
200
when the source of a dim orange light shines on a photosensitive metal, no photoelectrons are emmited. what can be done to increase the likelyhood of of producing photoelectrons?
increase the frequency of the light
200
what process involves smaller nuclei combining to form a big nucleus?(occurs most often on the surface of the sun)
nuclear Fusion
200
a copper wire has a resistance of 200 ohms. a second copper wire with twice the cross sectional area would have a resistance of...
100 ohms
300
if the mass of two particles is doubled, and the distance between them is doubled, the force of attraction between them will
remain the same
f=Gm1m2/r^2
300
if the potential difference applied to a fixed resistance is doubled, the power dissapated by the resistance...
quadruples
P=v^2/r
300
all photons in a vacuum have the same...
speed
300
a neutral atom of an isotope of element X has 44 electrons and 63 neutrons. what is the mass number of this isotope?
107
300
is this game awsome?
Yes.. any negative response will be deducted an additional 100 Points :)
400
what is the magnitude of the gravitational force between an electron and a proton separated by a distance of 1X10^-10 meter?
1X10^-47 N
400
an electron is accelarated through a potential difference of 2.5 X 10^4 volts in the cathode ray tube of a computer monitor. calculate the work done in joules done on the electron...
4 X 10^-15
v= w/q
400
what total mass must be converted to energy to produce a gamma photon with an energy of 1.03 X 10^-13 Joule?
1.14 X 10^-30
E=mc^2
400
compared to a proton, an alpha particle has ____ times the mass and ____ the charge
4 times the mass 2 times the charge
400
the frequency of a light is 5 X 10^14 Hz, what is the period of the wave?
2 X 10^-15 s
500
a 1000 Kg empty cart moving with a speed of 6 meters per second is about to collide with a cart weighing 5000 Kg. after the collision the carts lock and move togeather. 1)what is the speed of the combined carts after the collision?
2) calculate the kinetic energy of the carts after the collision
1) 1 meter per second
2) 3x10^3 Joules
500
a proton starts from rest and gains 8.35 X 10^-14 Joule of kinetic energy as it accelarates between the points A and B in an electric field. the potential difference between points A and B in the electric field is approxamtaly?
5.22 X 10^5 Volts
V=W/q
500
a photon has a wavelength of 9 X10^-10 meter. calculate the energy of this photon in Joules
2.21 X 10^-16
500
if the mass of one proton is totally converted to energy, it will yeild a total energy of...
1.5 X 10^-10
500
light with a wavelength of 6 x 10^7 meter passes through a pair of narrow slits and falls on a screen 2 meters away. if the distance between the two adjacent bands is 3 x 10^-2 meter, what is the distance between the two slits?