Physics, 29.07.2019 16:30 Mastersonisnot
Test will give medal to best 1 when the air under the envelope is heated, the balloon lifts. which of the following statements is true. a. hot air balloons use radiation to rise b. hot air balloons use conduction to rise c. hot air balloons use convection to rise d. hot air balloons use air resistance to rise is the answer answer c? ,
Answers: 2
Physics, 22.06.2019 13:50, heatherlemaster
The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?
Answers: 2
Physics, 22.06.2019 16:50, anaismami1
During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.
Answers: 2
Physics, 22.06.2019 19:30, cocoabean1981
The ability to make things happen is also called a. heat b. force c. matter d. energy
Answers: 2
Test will give medal to best 1 when the air under the envelope is heated, the balloon lifts. whic...
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