physics
What would the gravitational potential energy be if the bucket were raised six times as high?
physics
If you do 110 J of work to elevate a bucket of water, how much energy did you add to the gravitational field?
physics
A boulder is raised above the ground so that the gravitational potential energy relative to the ground is 360 J. Then it is dropped. What is its kinetic energy just before it hits the ground?
physics
Calculate the work done when a 18 N force pushes a cart 2.5 m.
Chemistry
What is the pH of a 0.77M solution of methylamin at 25 degree C? CH3NH2, Kb= 4.4X10-4? How do I set this up to get the answer?
maths
find the first 3 terms in the expansion of (x+4)(1+3x)^-2 as a series in ascending powers. I expanded the second bracket using binomial expansion and got 1 -6x +27x^2 -108x^3 how do I combine (x+4) with the expansion? Any help would be appreciated.
algebra
X= log base 3 1/27
Science
What is the momentum of a 50 kg carton that slides at 2 m/s across an icy surface? The sliding carton skids onto a rough surface and stops in 3 s. Calculate the force of friction it encounters.
science
A car with a mass of 700 kg moves at 18 m/s. What braking force is needed to bring the car to a halt in 10 s?
physics
In terms of impulse and momentum, why are airbags in automobiles a good idea? A.)Airbags actually do not help if a car is in an accident. B.)They increase the amount of force involved in a collision. C.)They decrease the amount of time for a collision to happen. D.)They increa...
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