Chemistry
What is the volume of a sample of helium that has a mass of 5.13x10^-3 and a density of 0.17847g/L
math
11
Calculus
The region in the first quadrant enclosed by the graphs of y = x and y = 2sin(x) is revolved about the x-axis. The volume of this solid is: (a) 1.895 (b) 2.216 (c) 5.811 (d) 6.678 (e) 13.355
finance
bonds are paying 8.125% how many do i need to sell to raise $1,ooo,ooo.oo
Physics
A 1-lb stone is heaved vertically upward with a speed of 40 ft/s from the top of a 100-ft cliff, and it hits the water below 100-ft below (narrowly missing the thrower on the way down). WATCH YOUR UNITS!! Find the stone's a) Total energy at time zero (set PE=0 at the water...
Physics
A 190 kg hoop rolls along a horizontal floor so that the hoop's center of mass has a speed of 0.160 m/s. How much work must be done on the hoop to stop it?
Physics
(a) What is the acceleration of an automobile that goes from a dead stop to a speed of 50 m/s in 5 s? (b) Assume that you are driving an automobile that has a mass of 800 kg. If this acceleration is applied, how much force (in Newtons) is applied?
physics
A 900-kg car is moving at 27.6 m/s. A braking force of -4320 N is applied for 4.60 s. What is the velocity of the car when the brakes are released?
Physics
A bullet moving with a speed 150 m/s strikes a tree and penetrates 3.5 cm before stopping. Find the magnitude of its acceleration and the time taken to stop.
Physics
If a projectile has a launching angle of 52 degrees about the horizontal and an initial speed of 18 m/s, what is the highest barrier that the projectile can clear?
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