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An object is placed to the left of a convex lens and on the optical axis. calculate the magnification of the image formed by the lens
Julie drives 100 mi to grandmother's house. On the way, Julie drives half the distance at 40 mph, How long does the return trip take
Mike throws a ball upward & toward the east at a 10.0 angle with a speed of 57.0 m/s. find the ball's initial angle in Nancy's referance frame
For a particular scientific experiment, it is important to be completely isolated from any magnetic field, What is the current in the current loop
You need to connect a 43k\Omega resistor and one other resistor to a 110 \rm V power line. what should be the value of the unknown resistor
A particle with a mass of 6.64* 10^-27 kg and a charge of +3.2*10^-19 C is accelerated from rest through a potential difference of 2.45*10^6 V. find the magnitude if the magnetic force exerted on the
A length of aluminum wire has a resistance of 16.0 ? at 28.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, find the temperature of the oven
A baseball bat is 1 meter long and is made of wood with density 525 kg/m^3. If the bat is held such that the point of rotation is 5.0 cm from the thin end, what is the rotational inertia of the bat
A 5 kg block sits on a surface with a maximum static coefficient of friction of 0.60. A 10g bullet is fired into the block. How much kinetic energy is dissipated in the bullet/block collision
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.0919 N when their center-to-center separation is 52.3 cm. find the positive charge in coulombs o
Calculate the electrical potential at the center of the square described as follows: Four charges are placed at the corners of a 20 cm square
A car starts from rest and travels for 8.0 s with a uniform acceleration of +2.4 m/s2. How fast is the car going at the end of the braking period
a charged plate holds 3nC of charge equally distributed on the plates surface area. find the constant electric field near the surface of this plate
A certain corner of a room is selected as the origin of a rectangular coordinate system. what is the distance of the fly from the corner of the room
A satellite circles the earth in an orbit whose radius is 2.78 times the earth's radius. What is the period of the satellite
A car coasts (engine off) up a 30 degree grade. If the speed of the car is 25m/s at the bottom of the grade, Compute the time it takes for the car to come to rest
A train (an engine and four cars) is accelerating at 1.60 m/s^2 . The mass of each car is 3.60 x 10^4 kg, What is the force of the first car on the second car
A crate of 45.2-kg tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move when your force exceeds 310N. find the coe
An unstretched spring is 13.0 cm long. When you hang an 845 g weight from it, it stretches to a length of 16.0 cm. What is the force constant (in N/m) of this spring
A skier approaches the base of an icy, frictionless hill with a speed of 13.4m/s . The hill slopes upward at 24.0^\circ above the horizontal. Find the acceleration of this skier
If the period of a 10-m long pendulum is 18 s on an asteroid, then what is the acceleration due to gravity on the asteroid
A 0.50 kg mass is attached to a spring of spring constant 20 N/m along a horizontal, frictionless surface. Find the potential energy stored in the spring when the mass is at its maximum displacement
A camera requires 5.2J of energy for a flash lasting 1.0 ms. What power does the flashtube use while it%u2019s flashing
John is farsighted and cannot see objects clearly that are closer to the eye than 65.0 cm. What is the focal length of the contact lenses
A track is mounted on a large wheel that is free to turn with negligible friction about a vertical axis. What is the angular speed of the wheel