Stars continue to form in the halo of our Galaxy today
Indicate whether the statement is true or false
FALSE
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A string is stretched with a tension of 100 N. The string has a length of 2.00 meters. The velocity of wave propagation along the string is 220 m/s. The mass of the string is
A. 3.75 gm. B. 4.13 gm. C. 4.66 gm. D. 5.21 gm. E. 5.74 gm.
Diagram below shows a hypothetical magnetic field in a certain region of empty space where the electric field is constant in time. 
Which of the fields are physically impossible and why?
A. This field violates the Ampere-Maxwell law. B. This field violates Gauss’s law for the magnetic field. C. The field violates both of the above laws. D. This field is physically possible.
A 15. ?F capacitor is connected to a 50. V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted
If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted? A) 0.25 kV B) 10. V C) 2.0 V D) 0.10 kV E) 20. V
A beam of electrons is sent in the positive x direction in a region with a uniform magnetic field B in the positive y direction and a uniform electric field E in the positive z direction. At which of the following speeds would the electrons be deflected in the positive z direction?
a. v = E/B b. There is no speed for which this will happen. c. v < E/B d. v > E/B