Doppler radar can be used to determine the rotation rate of a planet by measuring the maximum speed of the reflecting surface. The equatorial radius of Mars is 3400 km, and its rotation period is 24 hours and 37 minutes. If we transmit a monochromatic (single frequency) radar signal toward Mars with a frequency of 1000 MHz, what will be the range of frequencies received for the reflected signal in Hertz

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.