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(Figure 1) A bob of mass m = 0.300 kg is suspended from a fixed point with a massless string of length L = 23.0 cm . You will investigate the motion in which the string traces a conical surface with half-angle ? = 19.0 °. What tangential speed v must the bob have so that it moves in a horizontal circle with the string making an angle 19.0 ° with the vertical? Express your answer numerically in meters per second.
a metallic surface is illuminated with light of wavelength 400 nm if the work function for this metal is 2.487 eV what the velocity of the ejected electrons would be
suppose a random sample of 49 is selected from a population with a standard deviation of 14. if the sample mean is 125
A current I = 15 amp is directed along the positive x-axis in a wire, which lies perpendicular to a uniform magnetic field. The current carrying wire experiences a force per unit length of 63 N/m in the negative y direction. Decide the magnitude and ..
A container X has 2 moles of gas with a pressure of 120 KPa at a constant temperature of 300K. 1) Find the volume of the gas in the container X. 2) If the temperature is now increased to 450K, what is the new pressure of the gas in the container X.
Standard 14-gauge household copper wire carries 0.500 A of current with a current density of 2.40×105 A/m2. What is the strength of the electric field in the wire that is driving this current
Two diamonds begin a free fall from rest from the same height, 1.1 s apart. How long after the first diamond begins to fall will the two diamonds be 18 m apart?
a 1.0m long 1.0 mm diameter copper wire carries a current of 50.0 a to the east. suppose we create a magnetic field
A diffraction grating with 504 lines/mm is illuminated with light of wavelength 305 nanometer. Determine the angular separation between the two lines
the magnitude of the net electric field. A lead ball is dropped into a lake from a diving board 6.40 above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water.
A beam of light crosses the interface between two media with an angle of incidence of 34.0° and an angle of refraction of 24.6°. What is the index of refraction of the first medium
What is magnitude of the runner total displacement
A car is traveling at 10 m/s. How fast would the car need to go to double its kinetic energy? By what factor does the car's kinetic energy increase
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