Which of the following statements best describes the difference between a refracting telescope and a reflecting telescope?
A) A refracting telescope uses a transparent glass lens to focus light, whereas a reflecting telescope uses a mirror to focus light.
B) A refracting telescope produces refracted images, whereas a reflecting telescope produces reflected images.
C) Reflecting telescopes make much clearer images than refracting telescopes of the same size.
D) It is much easier to make a large refracting telescope than a large reflecting telescope.
A) A refracting telescope uses a transparent glass lens to focus light, whereas a reflecting telescope uses a mirror to focus light.
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A charged particle of mass 1.0 x 10-26 kg enters a region of magnetic field at a speed of 
at an angle of 37 degrees relative to the magnetic field direction. If the magnetic field strength is 1.2 T and the charge of the particle is +e, what will be the radius of the helical path it takes?
A. insufficient information given. B. 15 cm C. 11 cm D. 8.9 cm
If you are using a text editor to create a webpage, you specify a color for a webpage element by entering the color depth.
Answer the following statement true (T) or false (F)
These two skaters have just pushed off against one another. One skater has twice the mass as the other. Which one will experience the greater velocity?
A. The heavier skater
B. The lighter skater
C. Neither, they both have the same
A ball vibrates back and forth from the free end of an ideal spring having a force constant (spring constant) of 20 N/m. If the amplitude of this motion is 0.30 m,
what is the kinetic energy of the ball when it is 0.30 m from its equilibrium position? A) 0.00 J B) 0.22 J C) 0.45 J D) 0.90 J E) 1.4 J