A canon on a warship fires at a fixed angle 45 degrees. In a battle the ship hides behind a 60 m tall hill. a) What is the minimum firing speed needed to clear the hill (Neglect the air resistance)
b) How far should the ship
be from the base of the hill (point mark as B in the diagram) when it fires the cannon?
c) A Spy sends an instant
message indicating that
the enemy ship is 1400
m away from the base
of the hill (point marked
as B in the diagram) on
the opposite side is
approaching the hill with speed 100 m/s. How long do you have to wait till you fire the cannon to target the enemy ship?

Темирказык жулдызынын жулдыздык шамасы 2,02, ал веганын жулдыздык шамасы 0,03. осылардын кайсысы жарык жане неше есе жарык?

You and a friend (alex) are at a a tree-top adventure park .. . part of the course requires you to climb up a rope. you both climb the same rope in the same amount of time. however, the tension in the rope is greater when alex climbs. who did the most work? alex did - more tension means more force - more force means more work was done you did - less tension means less force - less force means more work was done to find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? when more work was done, the couch was moved less. when more work was done, the couch was moved further. when more work was done, the couch wasn't moved at all. when more work was done, the couch was moved the same distance.

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire