Sunday
December 8, 2013

# Posts by Juan

Total # Posts: 159

Physics
At what speed must a satellite of a mass M be launched horizontally at the surface of the earth if it's orbit is to be a circle just grazing the highest mountains?( assume no air resistance). How much time would elapse between successive passes of this imaginary satillite?

physics
A car weighing 9800 N travels at 30 m/s. What braking force (to the nearest whole number) brings it to rest in 100 m???? THNX BOBPURSLeY

Physics
A freight elevator has a mass of 240 kg. Find the tension in the cables (to the nearest whole number) when it ascends with an acceleration of 4 m/s2.

physics
A 18 kg object and a 6 kg object are hanging over a frictionless pulley. What is the acceleration of the system to the nearest tenth?

geometry
What's another way to write 8 3/4?

Math
The systolic blood pressures of the patients at a hospital are normally distributed with a mean of 136 mm Hg and a standard deviation of 13.4 mm Hg. Find the two blood pressures having these properties: the mean is midway between them and 90% of all blood pressures are between...

Math
If the odds against an event A are 15 to 1, what is the probability associated with event A occurring?

physics
A person travels by car from one city to another with different constant speeds between pair of cities. She drives for 38.6 min at 87.2 km/h, 10.3 min at 107.9 km/h, and 45.6 min at 45.7 km/h, and spends 17.9 min eating lunch and buying gas. Find the distance between the initi...

science
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Geometry
Find the volume of a rectangular solid with the following dimensions: 2.3 cm x 4.6 cm x 7.8 cm A. 8.25 cm3 B. 82.524 cm3 C. 41.262 cm3

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