A physics professor sitting on a stationary reference frame gives an exam to the students who are on a spaceship traveling at a speed vrelative to stationary frame. The moment the ship passes the professor, she signals the start of the exam. If she wishes her students to have time T0(spaceship time) to complete the exam, how much time should the professor wait (in the stationary frame) before sending a light signal telling them to stop? Draw a spacetime diagram and express the answer time in terms of T0and vand c.

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

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?