If a person in Alaska were locked out of his house on a day when the temperature outside was ?40°C, his thick clothing would mostly reduce the loss of thermal energy by

a. conduction.
b. convection.
c. radiation.
d. all of the above.
e. convection and radiation.


a

Physics & Space Science

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Thin Films: Light in air of wavelength 500 nm illuminates a soap film that has an index of refraction of 1.3 and air on both sides. What is the minimum thickness of this film that will produce cancellation in the reflected light when the light is incident normally on the film?

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

A projectile is projected from the origin with a velocity of 45.0 m/s at an angle of 30.0 degrees above the horizontal. What is the location of the projectile 3.00 seconds later?

A. X = 85.0 m, Y = 37.0 m B. X = 117.0 m, Y = 23.4 m C. X = 37.0 m, Y = 117.0 m D. X = 23.4 m, Y = 37.0 m E. X = 85.0 m, Y = 23.4 m

Physics & Space Science

No stars have yet been observed that have more than one exoplanet

Indicate whether the statement is true or false

Physics & Space Science

If air resistance can be ignored, which of the following graphs will be a straight line for a falling object?

A. Distance travelled versus velocity B. Velocity versus time C. Velocity versus distance travelled D. Distance travelled versus time E. Time versus distance travelled

Physics & Space Science