The ratio of the electric field to the magnetic field in the electromagnetic wave is the speed of the light
Indicate whether the statement is true or false
TRUE
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Jack pulls a sled across a level field by exerting a force of 120.0 N at an angle of 30.0° with the ground. What are the parallel and perpendicular components, respectively, of this force with respect to the ground?
a. 208 N, 120 N b. 120 N, 208 N c. 104 N, 60 N d. 60 N, 104 N e. 69 N, 208 N
Liquid water cannot survive on the surface of Mars because:
A) the atmosphere is too dense. B) the air pressure is too low. C) Mars has the highest escape velocity. D) Mars has never differentiated.
Doppler Effect: In many cartoon shows, a character runs off a cliff, realizes his predicament, and lets out a scream. He continues to scream as he falls. If the physical situation is portrayed correctly, from the vantage point of an observer at the foot of the cliff, the pitch of the scream as he falls should be
A. higher than the original pitch and constant. B. higher than the original pitch and increasing as he falls. C. lower than the original pitch and constant. D. lower than the original pitch and decreasing as he falls. E. It is impossible to predict.
147.5 ml of ethyl alcohol (coefficient of volume expansion 
at a temperature of 273.1 K is measured into a 150.0 ml glass beaker (whose coefficient of volume expansion is negligible by comparison). To what temperature does the beaker have to be warmed for it to be completely full (i.e. for the volume of the alcohol to reach 150.0 ml)?
A. 288.0 K B. 278.1 K C. 283.1 K D. 288.2 K