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If a car is traveling north at 88km/h and then turns east while continuing to move at 88km/h, what changes the velocity or the speed?
Assume that the air in the bubble is always in thermal equilibrium with the surrounding water, and assume that there is no exchange of molecules between the bubble and the surrounding water. What is
how many millilitres of 1.09 M HCl are required to react with a solution formed by dissolving 0.775 grams of sodium carbonate?
An engineer wishes to mount an axle on a gear (modeled as a solid disk of mass M and radius R). At what distance from the center of the gear should he mount the axle?
Find the direction of the force at the support point. Find the magnitude of the force at the left-hand end. Find the direction of the force at the left-hand end.
A projectile is fired staright upward at 141m/s. How fast is it moving at the instant it reaches the top of trajectory? How long does it take the projectile to reach the top of its trajectory? How
A 62-kg person on skis starts from rest down a hill sloped at 40° from the horizontal. The coefficient of friction between the skis and the snow is 0.10. After the skier had been moving for 5.0
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.