Which type of wave was used in telegraphs to communicate in Morse code?

If you had two forces, one with a magnitude of 25 N and the the other with a magnitude of 100 N, what would be the maximum net force these forces could exert on an object?

The Hubble Space Telescope (HST) orbits 569,000m above Earth's surface. Given that Earth's mass is 5.97 * 10^24 kg and its radius is 6.38 * 10^6 m, what is HST's tangential speed?

A body is at aheight of 81m and is ascending upwards with a velocity of 12m/s. a body of 2 kg weight is dropped from it. if g=10m/s^2. the body will reach the surface if earth in how much time.

A column of soldiers, marching at 121 steps per minute, keep in step with the beat of a drummer at the head of the column.

The density of mercury is 13.6 g/cm3 calculate the mass of 1 cm3 of mercury

What happens to chip bags when they are high in the atmosphere?

How do you calculate velocity?

A 0.065-kg tennis ball moving to the right with a speed of 15 m/s is struck by a tennis racket, causing it to move to the left with a speed of 15 m/s. if the ball remains in contact with the racquet for 0.

Which of the following are thought to be rapidly rotating neutron stars with intense magnetic fields? Choose one answer. a. pulsarsb. white dwarfsc. black holesd. flare starse. accretion disks

Which of the following can be a centripetal force? a. friction c. tension b. gravity d. all of the above