Morgan

Full question! 

Somewhere in the vast flat tundra of planet Tehar, a projectile is launched from the ground at an angle of 60 degrees. It reaches the maximum height of 15 m. The acceleration due to gravity is 30 m/s2.

A) Find the time in seconds the projectile spends in the air.

B) Find the initial speed of the projectile in m/s.

C) ANSWER: 17.3 Find the minimum speed of the projectile in m/s.

D) Find the horizontal range of the projectile in meters.

TIA! 

Please help I don't know where to begin this problem

Mass of H2O= 2.46g

I have already figured out that it is 0.14 moles as well as that it is 0.28 moles of hydrogen.

I am unsure how to solve for the mass of H with given values! Please help TIA

"According to People magazine, an understanding of sub-atomic particles called 'quarks' will allow us to construct cold fusion reactors. Therefore, it is likely that understanding these particles will allow us to construct such reactors."

A) Not an Argument

B) A Valid deductive argument

C) An invalid deductive argument

D) A Strong Inductive Argument

E) A weak inductive argument

A. A clear moral lesson

B. Plot

C. symbolism

D. Character

R1=2

R2=2-2sin(theta)

Separate with comas! Please help! How do I start this

Square root3 *sin(t)=cos(t)

Not sure how to solve in 0<t<2pi

Solve the equation for x in [0,2pi). Round to nearest thousandth

5tan^2x-1=0

There are four answers

I am confused as to where to go. I have tanx=(square root 5)/5

Arctan(square root 5)/5

-Arctan(square root 5)/5

I do not understand how to solve this when there is more than one trigonometric ratio. I know that sec is positive in quadrants 1&4 and negative in 2&3. Csc is positive in 1&2 and negative in 3&4

Sec t=square root3 csc t

1. Answer must be in 0<t,2pi

2. Then solve symbolically

TIA!

How do I solve step by step?

I know the answer is 625/a^27 but I am not sure how you get the 625

I recently did a lab on creating a Liquid Fertilizer in my Chem 231 class and we used the compounds...

KNO3, Na3PO4, KCl, and Fe(NO3)3 which were added into water

When all compounds were added into the flask with WATER it was insoluble. I have searched the solubility table and it shows they should all be soluble.

So which is the cation and which is the anion?? And how do I determine what the solid created was?

1.What is the change in energy, ΔE, in kilojoules per mole of hydrogen atoms for an electron transition from n=4 to n=2?

1. What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.6×1015Hz?

1. Which pair of symbols below represents a pair of isotopes?

16O, 16N

16O, 17O

H, He

He, He+

13C, 14N

2. Perform the indicated operations and express the answer to the proper number of significant figures. 13.236 cm x 6.2 cm/5.28 cm =