An alarm clock is set to ring for a total of 1.00 minute
it is placed on a spaceship moving at 0.6 c
according to mission control on earth, the alarm clock rings for:
a) 0.60 min
b) 0.64 min
c) 0.80 min
d) 1.00 min
e) 1.25 min

Which example has gravitational potential energy? a.a horse slowing down from a run b.an apple about to fall from a tree branch c.a bicycle being pedaled down a horizontal path d.beaker sitting on the floor

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?