Which use of a simple machine changes the direction of a force? a. using a ramp to load boxes onto a truck b. using an axe to split wood c. removing a bottle cap with a bottle opener d. lifting a rock with a crowbar

14. a body is projected with velocity vi from a. at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

Identify the type of heat transfer occurring when chocolate melts in your hand

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?