Atennis ball is hit at an angle of 20° to the horizontal with a velocity of 21 m/s. what is its velocity in the y-direction? a. 7.2 m/s b. 19.7 m/s c. 6.8 s d. 0.9°

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is