"Big Mike" throws a baseball straight up and it eventually falls back to him. When the ball was at its highest point, what was its velocity and what was its acceleration? (remember to include magnitude and direction)
What will be an ideal response?
Velocity was zero, acceleration was 9.8 m/s2 downward.
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Fiber optics in a DVD player contain their light by employing total internal reflection. Designers surround the pure glass core with another type of glass, called cladding, that has a different index of refraction from the core.
How should you select a cladding?
A. Cladding must have a larger index of refraction than the core B. Cladding must have a smaller index of refraction than the core
A steel ball bearing of mass m1 and speed of magnitude v1 has a head-on elastic collision with a steel ball bearing of mass m2 at rest. Rank the speed v1 of m1 relative to v2, the magnitude of the speed of m2, after the collision when i) m1 > m2; ii) m1 = m2; and iii) m1 < m2
a. v1 < v2; v1 < v2; v1 < v2 b. v1 < v2; v1 = v2; v1 > v2 c. v1 < v2; v1 > v2; v1 > v2 d. v1 > v2; v1 = v2; v1 < v2 e. v1 > v2; v1 > v2; v1 > v2
The planetary model of the hydrogen atom consists of an electron in a circular orbit about a proton. The motion of the electron of charge 1.60 × 10^-19 C creates an electric current. The radius of the electron orbit is 5.30 × 10^-11 m and the electron's velocity is 2.20 × 10^6 m/s. What is the magnetic field strength at the location of the proton?
The graphical representation of stream discharge over a period of time.
What will be an ideal response?