Imagine the deep, low sound made by a tuba. now, what is an example of a sound with a much higher pitch?

a) a big dogs growl.
b) the rumble of thunder.
c) the chime of a doorbell.
d) the horn blast from an eighteen wheeler.

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

While you are driving in the lane next to the curb on a multi-lane road the car on your left suddenly moves toward you lane. they are about toy crash into your front fender. you

How does the formation of intrusive and extrusive igneous rocks differ?