Afootball is kicked with a velocity of 18 m/s at an angle of 20. what is the balls acceleration in the horizontal direction as it flies through the air

After a car's engine has been running for a while, if you stand near the car's engine you can often feel heat coming from the engine as a result of a. radiation b. convection c. conduction

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine