Which of the following factors affect the amount of work needed to lift a heavy suitcase onto a high bed? Explain each answer The height of the bed
The mass of the suitcase
Whether the room is on the Earth or the Moon
Whether the suitcase is lifted straight up or on a diagonal

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory

In which of these cases are the two wave points considered to be in phase with each other?