Scattered light in the atmosphere is often partially polarized. The best way to determine whether or not light from a particular direction in the sky shows polarization is to
a. diffract the light through a single slit.
b. squint while looking in that direction.
c. rotate a piece of polaroid film about an axis parallel to the ray while looking through it in that sky direction.
d. rotate a piece of polaroid film about an axis perpendicular to the ray while looking through it in that sky direction.
e. reflect the rays from that direction on a shiny metal surface.
c
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Tectonic interaction between plate boundaries does not explain
A) magma production and the variety of igneous rocks. B) mountain building. C) polar wandering. D) global distribution of earthquakes and volcanoes.
The bob of a simple pendulum is 0.50 m above the floor at its lowest position. Calculate the maximum speed of the bob when it is held at a maximum height of 2.5 m and released
Electrons in the outermost shell are referred to as ______________ electrons
a. valence b. orbital c. f shell d. s shell
A 1.4-kg aluminum household iron has a 500 W heating element. The surface area is 0.046 m2. The ambient temperature is 21°C and the surface heat transfer coefficient is 11 W/(m2 K). How long after the iron is plugged in will its temperature reach 104°C?
GIVEN
• An aluminum household iron
• Mass of the iron (M) = 1.4 kg
• Power output ( Q
G ) = 500 W
• Surface area (As) = 0.046 m2
• The ambient temperature (T?) = 21°C
• The heat transfer coefficient ( )ch = 11 W/(m2 K)
FIND
• How long after the iron is plugged in will its temperature reach 104°C
ASSUMPTIONS
• Constant heat transfer coefficient
• The mass given is for the heated aluminum portion only
SKETCH
