Blue stars are always more luminous than red stars
Indicate whether the statement is true or false
FALSE
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A 60 kg boy standing on a skateboard with frictionless wheels and negligible mass throws a 3 kg ball straight up with a speed of 4 m/s. If the boy was at rest before the throw, his speed after the throw will be ________.
Fill in the blank(s) with the appropriate word(s).
An object with mass m and moment of inertia I is spinning with an angular momentum L. Its kinetic energy is:
a. 0.5I2/L. c. 0.5L2/m. b. 0.5L2/I. d. 0.5I2/m.
A long cylindrical conductor (radius = 1.0 mm) carries a charge density of 4.0 pC/m and is inside a coaxial, hollow, cylindrical conductor (inner radius = 3.0 mm, outer radius = 4.0 mm) that has a total charge of -8.0 pC/m. What is the magnitude of the electric field 2.0 mm from the axis of these conductors?
a. 24 N/C b. 18 N/C c. zero d. 36 N/C e. 226 N/C
In which direction does a quarter Moon rise?
A) north B) south C) east D) west E) The Moon becomes a quarter Moon only after it has risen and changed phase.