Physics
A roller coaster has a mass of 425 kg. It sits at the top of a hill with height 66 m. If it drops from this hill, how fast is it going when it reaches the bottom? (Assume there is no air resistance or friction.)
chemistry
The reaction of chlorine gas with solid phosphorus (P4) produces solid phosphorus pentachloride. When 63.5 g chlorine reacts with 28.5 g P4, which reactant is limiting?
statistics
if no preliminary sample is taken to estimate p, how large a sample is necessary to be 87% sure that the point estimate will be within a distance of 0.04 from p?
PHYSICS
A 2kg block is on a level table and held against a spring with k =150N/m which has been compressed 15 cm. he block is released from rest and pushed across the table. When the block leaves the spring it beins to experience fricion with coeficient of 0.25. What is the total dist...
PHYSICS
yes would you be able to show me?
math
the original question was x^2-4x=32 can you help me solve?
math
x^2-4x+32=0. would the final answer be 2 +or- 2 sqrt7 ?
math
Thank you!
math
I am working on quadratic equations and I have worked a problem down to 3 plus or minus the square root of 361 all over 2... what next?
Physics true false
true false The speed of a particle is always positive. True False The average speed of a particle is equal to the magnitude of its average velocity. True False The acceleration of a particle can be non-zero when its speed is constant. True False When the average velocity of a ...
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