Wednesday
December 4, 2013

# Posts by Ed

Total # Posts: 204

Phyiosics
Three point charges lie in a straight line along the y-axis. A charge of q1 = -9.50 µC is at y = 6.30 m, and a charge of q2 = -7.20 µC is at y = -4.00 m. The net electric force on the third point charge is zero. Where is this charge located? y = m

math year 3
identify the vertex and axis of symmetry y=2x^2-28x+91

Statistics
Given a population with a normal distribution, a mean of 100, and a standard deviation of 1, what value has an area of .1234 to its right?

statistics
E=CV(SD/square root of n) E=1.96(70/square root of 20) E=6.86 mean-e<mean<mean+e 350 - 6.86 < 350 < 350 + 6.86 343.14 < mean < 356.86 I think that is right

Physics
What minimum coefficient of friction between the tires and the road will allow a 3700 kg truck to navigate an unbanked curve of radius 25 m at a speed of 45 km/h? My answer: Fnet=ma Ff=m(v2)/r) Ff=(3700)(452/25) Ff=(3700)(2025/25) Ff=(3700)(81) Ff=299700 Frictional force Ff=Fn...

chemistry
How many moles of solute are contained in a 150ml solution of a 0.25 M NaNO3 solution?

history
Heather bought a ten-year maturity corporate bond when it was issued for \$1,000. The bond has an annual interest rate of seven percent and pays interest semi-annually. How much does she receive every six months?

math
3x + 4 = 5x - 7

Physics
In an accidental explosion, a satellite breaks in half while in circular orbit about earth. One half is brought momentarily to rest. What is the fate of the half brought to rest? What happens to the other half?

physics
A skier of mass 75.0 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 60.0 m up a 35° slope (assumed to be frictionless) at a constant speed of 2.0 m/s?

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