Friday
December 13, 2013

Posts by dee

Total # Posts: 709

Chemistry
Explain how you would prepare 100.0 mL of 0.500 M NaCl solution. Include the appropriate glassware and calculations.

math
A two digit number has the property that the units digit is 4 less than the tens digit and the tens digit is twice the units digit. What is the number?

Physics
A model rocket launches with an initial velocity of 6 m/s, at an angle of 90 degrees (with respect to the horizon). The rocket's engine provides an acceleration of 2.2 m/s2, acting in the same direction as the initial velocity. After 20 seconds, the rocket engine cuts out....

physics
A spacecraft is on a journey to the moon. At what point, as measured from the center of the earth, does the gravitational force exerted on the spacecraft by the earth balance that exerted by the moon? This point lies on a line between the centers of the earth and the moon. The...

physics
The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force SM that the sun exerts on the moon is perpendicular to the force EM that the earth exerts on the moon. The masses are: mass of sun = 1.99 1030 kg, mass of earth = 5.98 1024 kg, ...

physics
The weight of an object is the same on two different planets. The mass of planet A is only forty-five percent that of planet B. Find the ratio rA/rB of the radii of the planets.

physics
A rocket of mass 4.5 105 kg is in flight. Its thrust is directed at an angle of 45.5° above the horizontal and has a magnitude of 7.60 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.

math
How to name 3300 in 4ways

English II
I have to write an satire and I am doing it on the movie The Help.

physics
A hot-air balloon is rising straight up with a speed of 6 m/s. A ballast bag is released from rest relative to the balloon at 7 m above the ground. How much time elapses before the ballast bag hits the ground?

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