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May 24, 2015

Posts by Becca


Total # Posts: 313

Physics
A 50.0 kg parachutist jumps out of an airplane at a height of 1.00 km. The parachute opens, and the jumper lands on the ground with a speed of 5.00 m/s. By what amount was the jumper's mechanical energy reduced due to air resistance during this jump? so, you have to take ...
December 5, 2006

Algebra II
[(z^n)^3] / [z^n*z^3] How can I set this up? I'm pretty sure you have to simplify so that it's z^3n / z^n+3 but where can I do from there? or am I messing up a step somewhere? (z^n)^3= z^3n and z^n * Z^3= Z^(n+3) so z^3n / Z^(n+3) = z^(3n-n+3)
November 19, 2006

Physics
If a young girl is in a truck that is rolling down a hill with a force of 8765 N, what force must the brakes apply on the truck to have the truck roll at a constant speed? Would she have to apply more than 8765 N or less than 8765 N to get the truck to stop? My thoughts are, ...
November 19, 2006

Physics
A shopper in a supermarket pushes a loaded 32 kg cart with a horizontal force of 12 N. How far will the cart move in 3.5 s if the shopper places an 85 N child in the cart before pushing? I don't know how I can add the 85 N to the 32 kg or if I can or how that works in an ...
November 14, 2006

Physics
A 75 kg person escapes from a burning building by jumping from a window 25 m above a catching net. Assuming that air resistance exerts a 95 N force on the person during the fall, determine the person's velocity just before hitting the net. My main problem is finding the ...
November 14, 2006

Physics
A block with a mass of 5.0 kg is held in equilibrium on an incline of an angle with a measure of 30.0 degrees by the horizontal force F. Find the magnitude of F. Find the normal force exerted by the inbline on the block. (disregard friction) Well, I don't even know how to ...
November 14, 2006

Algebra II
Find all zeros of f f(t)=(t-2)^3-(t-2) ok... now do I have to factor out (t-2)^3 to [t^3-6(t^2)-12t-8] and then minus (t-2) resulting in [t^3-6(t^2)+13t-6]? if so, where can I go from there?? sorry... the second answer would be [t^3-6(t^2)+11t-6]
November 7, 2006

science
what do you use sulfur for or what is it made by. Sulfur is a basic chemical, used in production of rubber, plastics, acids, and medicines. I sometimes use sulfur (burning) to fumigate my wine casts.
October 16, 2006

Physics
Two students are on a balcony 19.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way down. What is the ...
September 25, 2006

Physics
A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, a ball dropped from rest from a building 15 m high. After how long will the balls be at the same height? The equations I have is final velocity squared = initial velocity squared plus...
September 24, 2006

Physics
A train travels between stations 1 and 2. The engineer of the train is instructed to start from rest at station 1 and accelerate uniformly between points A and B, then coast with a uniform velocity between points B and C, and finally accelerate uniformly between points C and D...
September 17, 2006

Social Studies!
2.) What is the name of the landform north of 40 degrees north latitude that juts out into the Atlantic like a giant fishhook? 3.) What flatlands extend south from the Cheapsake Bay to the east coast of Florida? 4.) From the top of which mountain range in the US could you see ...
September 9, 2006

ionic or covalent
Sodium Chloride- Ionic Calcium Chloride- Ionic Potassium Iodide- Ionic Citric Acid- Covalent Sucrose- Covalent
June 19, 2006

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