Ametal surface is illuminated by light of wavelength 310 nm. if the work function of the metal is 2.46 ev, what is the maximum kinetic energy of emitted photoelectrons? (for convenience, note that a photon of wavelength 1240 nm has an energy of 1 ev).a. 6.46 ev b. 4 ev c. 2.54 ev d. 1.46 ev e. 1.54 ev

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

Phase changes are chemical changes. true or false

According to newton’s first law of motion, which force is expected to cause a body to accelerate?