Friday
December 13, 2013

# Posts by Justin

Total # Posts: 727

general physics
His spacecraft, Vostok I, was a sphere about 2.3 m in diameter, and it reached a maximum altitude above Earth’s surface of 327 km. What was the spacecraft’s speed at this point in its orbit?

physics
starting from rest, find a 54.6kg child’s speed at the bottom of a 15.5m tall slide if it is assumed to be frictionless

Physics
1. a) Dy = Viy(t) + (1/2)(g)t^2 15.5 m = 0(t) + (1/2)(9.8 m/s^2)(t^2) t = sqrt[(15.5 m)/(4.9 m/s^2)] t = 1.8 sec answer b) Let V = speed of the ball just before it strikes the water. Vix = Vfx = 11.4 m/s Vfy = Viy + gt Vfy = 0 + (9.8 m/s^2)(1.8 s) Vfy = 17.64 m/s V = sqrt[Vfx^...

Physics
A golf ball rolls off a horizontal cliff with an initial speed of 12.2 m/s. The ball falls a vertical distance of 17.3 m into a lake below. (a) How much time does the ball spend in the air? (b) What is the speed v of the ball just before it strikes the water?

Physics
A meteoroid is speeding through the atmosphere, traveling east at 23.1 km/s while descending at 18.3 km/s. What is its speed, in km/s?

Physics
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0475 s, during which time it experiences an acceleration of 417 m/s2. The ball is launched at an angle of 59.7° above the ground. Determine the (a) horizontal an...

Physics
A tennis ball is struck and departs from the racket horizontally with a speed of 27.3 m/s. The ball hits the court at a horizontal distance of 18.7 from the racket. How far above the court is the tennis ball when it leaves the racket?

math
vlad purchased some furniture for his apartment. The total cost was \$2942.37. He paid \$850 down and financed the rest for 18 months. At the end of the finance period. Vlad owed 2147.48. What annual interest rate compounded monthly eas he being charged? round your answers to tw...

chemistry
How many liters of 20 Volume H2O2 will contain one mole of hydrogen peroxide?

math