Saturday
December 27, 2014

Posts by Darcie


Total # Posts: 9

physics
The current indoor world record time in the 200-m race is 19.92 s, held by Frank Fredericks of Namibia (1996), while the indoor record time in the one-mile race is 228.5 s, held by Hicham El Guerrouj of Morroco (1997). (a) Find the mean speed in meters per second corresponding...
March 11, 2012

physics
How long will it take a motor 1500 watt motor to lift a 500kg elevator 30 meters? Give your answer in minutes.
February 26, 2012

physics
Calculate the work required to lift a 20kg object from the floor to a height of 2 meters. Give your answer in Joules
February 26, 2012

physics
The 20kg object is dropped from a height of 2 meters. Find its speed when it hits the ground. Give your answer in meters per second.
February 26, 2012

physics
A block of mass m = 4.30 kg is released from rest from point circle a and slides on the frictionless track shown in the figure below. (Assume ha = 5.20 m.) B=3.20 c=2.00 (a) Determine the block's speed at points circle b and circle c. point circle b Y point circle c (b) ...
February 23, 2012

physics
A 59.0-kg runner has a speed of 3.20 m/s at one instant during a long-distance event. (a) What is the runner's kinetic energy at this instant? KEi = J (b) If he doubles his speed to reach the finish line, by what factor does his kinetic energy change? KEf KEi =
February 23, 2012

Chemistry
Molarity of the first and volume of the first = molarity of the 2nd
March 8, 2009

math
my daughter is doing homework using greatest common factor, greatest common divisor, and prime factorization. She has this problem: Computers in the research room of the history museum are 30 wide, 30 inches apart and at either end of a row 30 inches from the wall. How many ...
February 16, 2009

Math Grade 5
my daughter is doing homework using greatest common factor, greatest common divisor, and prime factorization. She has this problem: Computers in the research room of the history museum are 30 wide, 30 inches apart and at either end of a row 30 inches from the wall. How many ...
February 16, 2009

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