A space probe on the surface of Mars sends a radio signal back to earth a distance of 8.66x0^7 km. Radio waves travel at the speed of light (3:00x10^8 m/s. How many seconds does it take the signal to reach earth

Peter's body supplies a force of 500 N to run up a 10-m hill in 10 s. How much power is involved in Peter's run up the hill?

Which type of electromagnetic wave has a wavelength that is about 10 m to 1000 m in length?

Which compound is an example of a binary ionic compound? A) H2O B) H2SO4 C) MgF2 Eliminate D) SF6

Which object will be considered to be in free fall

A careless window washer dropped his water bucket from high up on the building. The sound of the bucket reached the window washer 4.7 seconds after he dropped it. If the speed of the sound that that day was 347m/s how high was the window washer

A car is moving with a speed of 22 m/s. The driver then brakes, and the car comes to a halt after 6.5 s. What is the distance covered by the car after the driver brakes, until it comes to a stop? A) 36 m B) 72 m C) 140 m D) 210 m

Which of the following best explains why an explosive charge in a cannon can cause a cannonball to fly out of the cannon with a high velocity? A. because chemical potential energy can convert to gravitational potential energy B.

Distance divided by time what is velocity

The decay constant of a radioactive nuclide is 4.6 x 10^-3 s^-1. What is the half-life of the nuclide? 2.5 min 2.0 min 1.4 min 3.6 min 3.1 min

A furlong is an old british unit of length equal to 0.125 mi, derived from the length of a furrow in an acre of ploughed land. a fortnight is a unit of time corresponding to two weeks, or 14 days and nights.