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Find the net force acting on particle 3 due to the presence of the other two particles. Report you answer as a magnitude and a direction measured from the positive x axis. Express the magnitude in n
Aa slide projector which has a converging lens of focal length 20.0cm is used to magnify the area of a slide 5cm^2 to an area 0.8cm^2 on a screen. calculate the distance of the slide from the proje
A baseball is thrown at an angle of 27 degrees relative to the ground at a speed of 20.9m/s. The ball is caught 36.0231m from the thrower. The acceleration due to gravity is 9.81m/s square. How long
Three equal point charges, each with charge 1.95 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.350 m. What is the electric potential energy U of the system
A toy train is pushed forward and released at xi = 1.0 m with a speed of 1.6 m/s. It rolls at a steady speed for 1.9 s, then one wheel begins to stick. The train comes to a stop 6.0 m from its start
A 25.0-{rm kg} crate is pulled northward at a constant speed of 20.0 {rm m}/{rm s}. One of the forces acting on the block acts in a direction 60.0 ^circ east of north and has magnitude 15.0 {rm N} A
A 3.25 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.1
A baseball of mass 0.144 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?
A child receives 10mg of medicine for every kilogram she weighs. How much medicine should she receive if she weighs 48 pounds and the conversion factor for pounds to kilograms is 1 pound = 0.4536kg
A solid (cylindrical) flywheel of mass m and radius r is initally at rest. A force F acts tangentially on its perimeter for a time t. What is its angular displacement during that time?
What is the temperature of 0.600mol of gas at a pressure of 1.3atm and a volume of 11.6L?
If the electic field is turned off, the particles move in the magnetic field in circular paths of radius r=2.67 cm Determine q/m for the particles from these data. answer in units of C/kg.
If 15% this maximum load is hung from the wire, by what percentage of its length will it stretch ?
The volume of a gas collected when the temperature is 11 degrees Celsius and the pressure is 710 mmHg measures 14.8 ml. What is the calculated volume of the gas at 20 degrees Celsius and 740 mmHg?
When an 85.0-kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 1.70 x 103 J. By how much does the potential energy of a 23.0
A pitcher throws a curveball that reaches the catcher in 0.61 s. The ball curves because it is spinning at an average angular velocity of 370 rev/min (assumed constant) on its way to the catcher's
A 35.0-g bullet strikes a 4.3-kg stationary piece of lumber and embeds itself in the wood. The piece of lumber and bullet fly off together at 7.6 m/s. What was the original speed of the bullet?
Use Bernoulli's equation to estimate the upward force on an airplane's wing if the average flow speed of air is 192 m/s above the wing and 164 m/s below the wing. The density of the air is 1.5 kg/m
Three equal point charges, each with charge 2.00 , are placed at the vertices of an equilateral triangle whose sides are of length 0.650 . What is the electric potential energy of the system? (Take
A 4.000 g sample of aspirin prepared in the laboratory using 5.000 g salicylic acid and 20 mL of acetic anhydride. What is the percent yield of aspirin?
What is the minimum height the mirror must have foryou to be able to see the top of the table in the mirror?
A cosmic-ray proton in interstellar space has an energy of 10.0 MeV. What is the magnetic field in that region of space?
A hockey puck moving along the +x axis at 0.46 m/s collides into another puck that is at rest. The pucks have equal mass. The first puck is deflected 38 below the +x axis and moves off at 0.37 m/s.
Pure benzene C6H6, freezes at 5.5°C and boils at 80.1°C. What is the boiling point of a solution consisting of cyclohexane (C6H12) dissolved in benzene if the feezing point of this solution
The proton strikes the negative plate at the same instant that the electron strikes the positive plate. Ignoring the attraction between the two particles, what was the initial speed of the proton?