Thursday
July 2, 2015

Posts by kareem


Total # Posts: 21

physics
The half-life of carbon-14 is 5730 years. How much of a 50 g sample of carbon-14 is present after 11,460 years?
February 24, 2015

physics
Suppose that you balance a 5 kg ball on the tip of your finger that has an area of 1 cm2. What is the pressure on your finger?
January 21, 2015

physics
A rectangular barge floats in freshwater. When a 400 kg block is loaded on the 5 m long by 2 m wide barge, the barge sinks a few centimeters deeper. How much deeper does the barge lower?
January 21, 2015

physics
A box of mass 10 kg is pushed across the floor with a force of 25 N. A 2 N frictional force opposes the motion. What is the acceleration of the box?
January 15, 2015

physics
A ball is thrown at 22 m/s at 45 degrees to the horizontal. A 5 foot tall fence is located 100 meters away. Does the ball make it over the fence?
January 15, 2015

physics
A rock thrown horizontally from a bridge hits the water below 30 meters away in the horizontal direction. If the rock was in the air for 2 seconds, how tall is the bridge?
January 15, 2015

physics
Calculate the force of gravity between Earth (mass = 6.0 * 1024 kg ) and the moon (mass = 7.4 * 1022 kg) the average earth-moon distance is 3.8 * x10^8 m
January 14, 2015

physics
A 70 kg person is riding on a frictionless skateboard at 5 m/s. A friend facing him throws a 5 kg ball toward him at 20 m/s. What is his final speed after catching the ball?
January 6, 2015

plus 1-chemistry
calculate the mass of caco3 required to librate 10l of co2 at stp?
March 7, 2013

math
find the perimeter for 11in + 9 1/2in + 7in + 9 1/2in
February 26, 2013

Geometry
A line parallel to one side of a triangle divides one of the other sides into segments of lengths 15 and 9 and divides the third side so that the longest portion is 36. How long is the shorter portion of the third side?
April 4, 2011

math
each pizza has 8 slices the teachers want enough pizzas so that each student can have 2 slices if there are 22 students in eeach of the 3 fourth grade classes how many pizzas must be ordered
January 25, 2011

chemistry
weak acid
April 7, 2010

math
the loan arranger
January 21, 2009

algebra
The vertices's of triangle ABC are A(-1,2), b(0,3), and c(3,1). Determine the vertices A', B', and C' of the image of triangle ABC after a reflection across the x-axis.
September 1, 2008

algebra
Graph 2x+4y<1.
September 1, 2008

algebra
Factor 2x^2-5x-12
September 1, 2008

algebra
Find the distance between (-3,-2)and (1,7).Round to the nearest tenth.
September 1, 2008

algebra
The formula k=0.5mv^2 relates the kinetic energy of a body to its mass m and speed v. Solve the formula for m.
September 1, 2008

algebra
How many ways can you roll two standard number cubes and get a sum of 9?
September 1, 2008

algebra
As of the year 2000, the highest wind speed recorded on top of Mount Washington was 231 mi/h which is about 298% of the highest wind speed recorded in Chicago. What was the highest wind speed recorded in Chicago as of the year 2000?
September 1, 2008

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