Thursday
December 5, 2013

# Posts by Brittney

Total # Posts: 189

Chemistry
It's 50mg. I really dont understand how to do this.

math
what is the gross profit percent on a item bought for 3.50 at wholesale price and then sold at 5.00 for retail price

frictionless ramp
Suppose a 19.3 kg curling stone was on a frictionless ramp. If the ramp is 4.76 m tall and 19.5 m long (along the incline), how much mass must hang from the pulley in order that the stone not accelerate up or down the ramp?

Physics Help
A force sensor is used to measure a force applied to a 9.1 kg box on a hard, horizontal surface. It records that the box starts to move when the force is equal to 26.9 N. This force makes the box start to move with an acceleration of 0.2 m/s2. Find mu sub s/k respectively.

algebra 1
Choose the product. -7p3(4p2 + 3p - 1) -28p5 - 21p4 + 7p3 28p6 + 21p3 - 7p 21p3 + 8p2 + 3p4 - 8p -21p5 + 8p4 - 3p3

Chemistry
Calculate the uncertainty in the position (in A) of an electron moving at a speed of (6.5 +/- 0.1)* 10^5m/s. The mass of an electron is 9.109x10^-31 kg. Thanks!

algebra
If a train goes 25 mph how many hours. Does it need to go in 125 miles

history
How did George Kennan’s containment doctrine change during the Truman, Eisenhower and Kennedy administrations? Which president was the most successful in containing Communism?

history
Describe President Reagan’s foreign policy goals and summarize several of the major, specific actions he took to meet those goals.

history
How was the civil rights movement of the 1950s and 1960s a continuation of the Reconstruction-era struggle for blacks to achieve equality?

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