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When is it more likely for a light bulb, filament, to burn out, when it is switched on or after it has been burning for a while? What is the reason for this behavior?
Calculate the orbital period of Pluto (in yr) from knowledge of G, the mass of the sun (M = 1.99×1030 kg), and the orbital radius of Pluto of 3.96×101A.U. Given that the gravitational fo
Question: At the top of Earth's atmosphere, sunlight has an average intensity of 1380W/m^2 .If the average distance from Earth to the Sun is 1.5*10^11m, at what rate does the Sun radiate energy?
(a) A wire 1 m long is perpendicular to a magnetic field of 0.01 T. What is the force on the wire when it carries a current of 10 A? (b) What is the force on the wire when it is parallel to the magn
A thin-walled metal sphere has a radius of 25 cm and carries a charge of 2.0x10^-7 C. Find E for a point (a) inside the sphere, (b) just outside the sphere, and (c) 3.0 m from the center of the sphe
A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 4 m down a q = 28° incline. The sphere has a mass M = 5.2 kg and a radius R = 0.28 m. What is the
A stick of uniform density with mass M = 8.3 kg and length L = 0.8 m is pivoted about an axle which is perpendicular to its length and located 0.15 m from one end. Ignore any friction between the st
The work function for cesium, 1.81 eV, is much lower than the work function for other metals. a) What is the photoelectric cut-off wavelength?
A line in the x-ray spectrum of gold has a wavelength of 18.5 pm(=18.5x10^-12 m) The emitted x-ray photons corresponds to a transition of the gold atom between two stationary states, the upper one o
A 575 ohms resistor and a 260mH inductor are connected in series with an ac generator with an rms voltage of 15.0V and a frequency of 65.0Hz. What is the rms current in this circuit?
A gas thermometer registers a pressure of 2.79 kPa when measuring the boiling point of water. What pressure in pascals would register when measuring the triple point of water?
A system consists of 0.697 kg of water at 80 degrees C. A paddle wheel does 42 kJ of work stirring the water. The heat energy lost to the environment is 15 kJ. What is the final temperature of the s
A setup similar to the one shown in the figure below is often used in hospitals to support and apply a horizontal traction force to an injured leg. (Let m = 6.05 kg and ? = 81.0°.) (a) Determin
Find the intensity of visible light in the spot if the intensity of visible light striking the lens is 791 W/m2
A sphere of copper is subjected to 81.1 MPa of pressure. The copper has a bulk modulus of 130 GPa. By what fraction does the volume of the sphere change? By what fraction does the radius of the sphe
Two forces F1 and F2 are acting on a mass M=6.0 kg. The force F1 = 5.0i + 7.0j + 2.0k, in N. The acceleration of the mass is given by a = 2.0i + 7.0j + 5.0k, in m/s2. Calculate the magnitude of F2.
Question: On forming the nuclide from the protons, neutrons and electrons, the mass loss per nucleon for the is 0.00759 amu, whereas that for is 0.00944 amu. This means that:
A spacecraft moving away from Earth emits a 4346 Hz signal. A scientist on Earth measures the signal to be 4344 Hz. What is the speed of the spacecraft relative to Earth?
A 15 g rifle bullet traveling 240 m/s buries itself in a 3.9 kg pendulum hanging on a 2.9 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal compon
A 60 year old person has a threshold of hearing of 75.0 dB for a sound with frequency f = 10,000 Hz. By what factor must the intensity of a sound wave of that frequency, audible to a typical young a
A string vibrates in its fundamental mode with a frequency of 380 Hz. The string is 0.73 m long and has a mass of 1.51 g. With what tension in N must the string be stretched?
Question: A cylindrical solenoid of radius 3.0 cm is wound with a turn density of 1300 turns/m. It carries a current of 2.0 A. How much energy is stored per meter length of the solenoid?
A sphere of mass 35kg is attached to one end of a rope. It is found that the rope does an amount W = 550J in pulling the sphere upwards through a distance of 1.5m. Find the tension in the rope.
A generator has a 140-turn square coil, 5 cm on a side. A) Find the peak emf in this coil when it's rotating at 110Hz in Earth's field, B=5e^-5T.
In the other two corners are placed charges of +3.0 uC and -3.0 uC. what is the magnitude of the electric field at the square's center? answer in N/C please.