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The note "middle C" on a piano has a frequency of 512 Hz in the fundamental tone. Suppose that the string that produces this note has a mass of 50g and a length of 10cm between its fixed ends. What
How much energy can be stored in a capacitor with two parallel plates, each with an area of 15.0 cm2 and separated by a gap of 2.9 mm, filled with porcelain whose dielectric constant is 7.9, and hol
Find the acceleration of the proton, given that the magnetic field at its altitude is 4.30 10-5 T.
An electron accelerated from rest through a voltage of 420 V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 23 cm.
When 92.8 V is applied across a wire that is 9.8 m long and has a 0.32 mm radius, the magnitude of the current density is 1.5 x 104 A/m2. Find the resistivity of the wire.
The potential applied to the wire (end to end) is 55.0 V. How much energy is converted to thermal energy in 1.40 h?
At time t = 1 s, its angular momentum is L0. What is its angular momentum at time t? Give your answer in terms of the variables given.
A boy of mass 50.5 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.3 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 10.9 m/s. Find t
Calculate the total magnetic flux through the dashed rectangular surface below. The current in the wire is 2.4 A in the direction indicated.
Calculate the pressure exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.
The four tires of an automobile are inflated to a gauge pressure of 2.04E+5 Pa. Each tire has an area of 0.0274 m2 in contact with the ground. Determine the weight of the automobile.
The coefficient of static friction between the box and the floor is 0.35 What is the weight of the sand and box in that situation?
A student calculates the unknown liquid to have a density of 0.87 g/cm^3. If the class average for the density of the liquid was 0.81 g/cm^3, what should the student calculate as the percent error?
What is the kinetic energy of the projectile when it reaches the highest point in its trajectory?
Determine the magnitude of the acceleration of the train when it reaches point B, where path distance from A to B is 412 m.
A moving conductor is a part of a rectangular circuit. The velocity of moving conductor is 4m/s and the length is 10cm. Entire system is in a uniform magnetic eld with a magnitude of 0.5T. Find indu
For an RLC circuit with a resistance of 11.0 k, a capacitance of 9.0 F, and an inductance of 26.0 H, what frequency is need to minimize the impedance?
The initial velocity of a 4.0kg box is 11m/s due west. After the box slides 4.0m horizontally its speed is 1.5 m/s. Determine the magnitude and the direction of the non conservative force acting on
A 51kg woman runs up a flight of stairs in 5.0s. Her net upward displacement is 5.0m. Approximately what average power did the woman exert while she was running?
What is the magnitude of an electric field that balances the weight of a plastic sphere of mass 6.2 g that has been charged to -3.0 nC?
Taking the negative direction to be downward, what is the impulse of the net force applied to the ball during the collision with the floor?
Two capacitors, one 12.0 µf and the other of unknown capacitance, are connected in parallel across a battery of EMF 9.0 V. The total energy stored in the two capacitors is 0.0115 J. What is th
In living tissue, about one out of every 10-12 carbon atoms are the 14C isotope. If you were to discover a human bone with a 14C occurrence of one out of every 10-14 atoms, how long ago did the owne
A proton enters a uniform magnetic field that is at a right angle to its velocity. The field strength is 0.50 T and the proton follows a circular path with a radius of 4.6 cm. what is its kinetic en
A force F = 10i + 9j + 12k acts on a body mass of 100 grams. If the displacement of the object is d = 5i + 4j, where d is given in meters, find the work force and the angle between the force and dis