Aspacecraft of mass 1500 kg orbits the earth at an altitude of approximately 450 km above the surface of the earth. assuming a circular orbit, what is the attractive force that the earth exerts to keep the spacecraft+ in orbit?(a) 1.28x 10^7 (n) (b) 2.99 x 10^7 (n) (c) 3.56 x 10^7 (n). (d) 4.11 x 10^7 (n) (e) 5.06x 10^7 (n)

What happens when a rubber rod is rubbed with a piece of fur?

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero