Amodel rocket is launched at an angle of 70° above the x axis, with an initial velocity of 40 m/s. how long will the rocket be in the air? a. 2.4 s b. 3.8 s c. 6.5 s d. 7.7 s

i think the answer is a, hope this is right, that would be my best guess.

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide