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Find the rocket's final speed assuming it moves straight upward near the surface of Earth where the gravitational field g is constant.
A candle is placed 15.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 8.5 cm farther away from the mirror. Find the focal length of the conv
Automobile engine slows down from 4500rpm to 1200rpm in 2.5 s. Calculate (a) its angular acceleration, assumed constant, and (b) the total number of revolutions the engine makes in this time.
How many grams of NaCl are needed to prepare 250. mL of this solution (assume the density of the saline solution is 1.0 g/mL)?
If an rac man uses a long handled wheel brace (1.5m long) to help him remove a wheel nut off a lorry and he pulls on the handle with a force of 400n, what is the size of the moment produced? includ
A child exerts a tangential 41.0 {N} force on the rim of a disk-shaped merry-go-round with a radius of 2.00 {m}.If the merry-go-round starts at rest and acquires an angular speed of 0.0900 {rev/s} i
Assume the positive x axis is directed to the right. Find the magnitude and direction of the net displacement of the player using the graphical method.
The boxes are in contact, and a force of 60.0 N is applied horizontally to the smaller box. what is the acceleration of the two boxes?
Sam, whose mass is 80.0 , takes off down a 51.0 high, 9.0 slope on his jet-powered skis. The skis have a thrust of 220 . Sam's speed at the bottom is 45.0 . what is the coefficient of kinetic frict
The loaded cab of an elevator has a mass of 1.7 x 103 kg and moves 201 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab?
A 1.0m diameter vat of liquid is 2m deep. There pressure at the bottom of the vat is is 1.3atm. What is the mass of the liquid in the vat?
Rank the four voltages, V1, V2, V3, and V4 in order of decreasing value. Rank from largest to smallest. To rank items as equivalent, overlap them.
Two Vectors, A and B, are added by means of vector addition to give a resultant vector R: R=A+B. The magnitudes of A and B are 6.2 m and 7.8 m, respectively, and they can have any orientation. What
An Alaskan rescue plane traveling 44 m/s drops a package of emergency rations from a height of 160 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s2 . Where does the packag
If the input force of moving a box of rocks yp a hill is 3 N and the output force needed to lift the box is 25N, what is the mechanical advantage of the inclined plane?
A chair of weight 115 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 42.0 directed at an angle of 34.0 below the horizontal and the chair slides
Two point charges Q1=+5.10 nC and Q2=-3.40 nC are separated by 30.0cm. (a) What is the electric potential at a point midway between the charges? (b) What is the potential energy of the pair of char
gasoline has a density of 0.67 g/mL at 20 degrees celcius. what is the mass of gasoline in your cars tank when it is filled to its capacity of 15.0 gallons.
A 100 g sample of an unknown liquid absorbs 2000 J of heat energy, raising the liquid's temperature from 50 ? C to 70 ? C . What is the speci?c heat capacity of this liquid? No phase change took pla
To reach the end point in the titration a total volume of 14.71mL of base was needed. What is the mass percent of benzoic and gallic acid?
A 55.0 kg person jumps from rest off a 8.0 m high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 3.00 m under the surface of the water. Determine th
when 230 ml of water is added to a stock solution of 2.5M 420.0 ml Na3PO4. what is the final concentration of Na+?
A railroad car of mass 2.8 104 kg moving at 2.50 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. (a) W
The density of palladium at 20°C is 12.0 g/mL and at 1550°C the density is 11.0 g/mL. What is the change in volume (in mL) of 4.21 kg Pd in going from 20°C to 1550°C?
Next, the circle is vertical. In the vertical case the maximum tension in the string is 18.0% larger than the tension that exists when the circle is horizontal. Determine the speed of the stone.