# Posts by deidra

Total # Posts: 13

Physics
1. What is the speed of a 70kg rock after it has fallen freely for 1000m? 2. How far would a 1kg ball have to fall freely to reach a speed of 100km/h?

chemistry
how many moles of NaCl are in a box of salt containing 425g NaCl (g/mol)

chemistry
The standard free energy of activation of a reaction A is 78.2 kJ mol–1 (18.7 kcal mol–1) at 298 K. Reaction B is ten million times faster than reaction A at the same temperature. The products of each reaction are 10.0 kJ mol–1 (2.39 kcal mol–1) more stable...

physics
An open barge has the dimensions l=22 m, w=40 m, and h=12m. If the barge is made out of 4.0 cm thick steel plate on each of its four sides and its bottom, what mass of coal can the barge carry in fresh water without sinking? Is there enough room in the barge to hold this ...

chemistry
how many moles of sugar are contained in a 10-lb bag of sugar if sugar has formula C12H22O11? first convert the pounds into grams, then grams into moles.

algebra
Wind farms are a source of renewable energy found around the world. The power P(in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v(in meters per second) If a turbine generates 500kW in a 10m/s wind, how much power does it generate in a ...

algebra
The table shows the amount of milk that Wisconsin dairy farms produced from 1940 to 1997. Use linear model to estimate milk production in 1990. year milk produced 1940 7 1972 7 1997 8 15.1 12.5 7.5 2.5

algebra
which polynomial has a graph that passes through the given points? (-3,10),(-1,0),(0,-5),(3,52). y=x^3-4x^2+2x-5 y=x^3+4x^2-2x-5 y=x^3+4x^2+2x-5 y=x^4+4x^3-2x^2-5x If someone could walk me through I'd be thankful

p.e.
How to fill out an observation document?

English
real

English
You should use really fine

Math
Rectangle ABCD shares BC with equilateral triangle BCE. The length of CD is 4cm, and the length of DA is 3cm. What is the length of BE?

math
A tetherball is attached to the end of a 3-meter rope. The rope is attached to a pole thatis 5 cm in diameter. Estimate the greatest number of timees the rope could rap around the pole. Use 3 for pi(3.14) to make your estimate.