Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
One recent study has shown that x rays with a wavelength of 0.0050 can produce significant numbers of mutations in human cells. Calculate the energy in of a photon of radiation with this wavelength.
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 {\rm nm} (red) and 486 {\rm nm} (blue).
What is the potential difference measured across the plates now (as a multiple of the original potential difference)?
The wire is wound into a thin, flat coil of many turns that has a radius of 0.150 m. The ends of the wire are connected to a 12.0-V battery. Find the magnetic field strength at the center of the coi
(a) What is the capacitance in picofarads of the system? (b) If the charges are changed to +260 pC and -260 pC, what does the capacitance in picofarads become? (c) What does the potential difference
A single conducting loop of wire has an area of 7.8×10-2 and a resistance of 120. Perpendicular to the plane of the loop is a magnetic field of strength 0.38. what rate (in) must this field ch
The ground state of Ne-17 is unstable. It's half-life has been measured to be 109 ms. (a) What is the energy width of the state? (b) List two possible decay mechanisms.
Assuming the tire is launched without a push from its highest point, what is the frequency of the tire-swing-pendulum (unloaded)? How long is the rope?
A 0.49·kg mass vibrates according to the equation x = 0.45 cos (8.36t + 1.05), where x is in meters, and t is in seconds. (a) Determine the amplitude. (b) Determine the frequency.
A straight wire in a magnetic field experiences a force of 0.034 N when the current in the wire is 2.5 A. The current in the wire is changed, and the wire experiences a force of 0.042 N as a result.
How much work would it take to rotate a 10 cm diameter loop carrying 25 A of current with a normal vector oriented 30* from a 2.0 T magnetic field to where the normal vector was completely anti-para
Assume the long dimension of the cord is perpendicular to the vertical component of Earth's magnetic field at that instant. (a) What is the magnitude of the vertical component of Earth's field at this
A 77.5 kg man just before contact with the ground has a speed of 6.22 m/s. In a stiff-legged landing he comes to a halt in 2.08 ms. Calculate the average net force that acts on him during this time.
Determine the mass flow rate of the water through the turbine generator in kg/s
A future space station in orbit about the earth is being powered by an electromagnetic beam from the earth. The beam has a cross-sectional area of 135 m2 and transmits an average power of 1.20 &time
As expected, the predictions of Coulomb's law are well confirmed. You find that the forces are repulsive or attractive? and what is the magnitude of the force in terms of N?
Then, the ball begins to move with a velocity V0= 15.0 m/s. The kinetic coeffient between table and the slipping ball is 0.214. In order that the ball can roll without slipping with a speed V= 14.10
A cylinder-shaped carbon resistor is 8 em in length and its circular cross section has a diameter d = 1 mm. a) Determine the resistance R. b) To reduce its resistance by 40%, the carbon resistor co
The string is vibrating in its fundamental mode throughout this process. Find the number of oscillations it completes during the 3.5s interval.
A taut string has a length of 2.60m and is fixed at both ends. (a) Find the wavelength of the fundamental mode of vibration of the string (b) Can you find the frequency of this mode? Explain why or
A standing wave is described by the wave function Y = 6sin((pi/2)x)cos(100pi(t)) Where x and y are in meters and t is in seconds. From the graph, identify the wavelength of the wave and explain how
Calculate the speed of the electrons in the water. The speed of light in water is 2.25 X 10^8 m/s.
An ambulance moving at 42 m/s sounds its siren whose frequency is 450Hz. A car is moving in the same direction as the ambulance at 25 m/s. What frequency does a person in the car hear (a) as the amb
An electron accelerated from rest through a voltage of 490V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 18cm, what is the magnitude of the m
Assume that none of the alpha particles bounced back from the sheet, meaning that the alpha particles either were captured by the shielding or penetrated completely through the shielding. What perce