What is the mass of an object traveling at 20 m/s with a kinetic energy of 4000 j?

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

This punnett square shows the cross between two pants. one parent has round seeds (rr). and the other parent has wrinkled seeds (rr) which best describes their offspring as shown in this cross?

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron