The Compton effect importantly demonstrated which property of electromagnetic radiation?
A) energy content
B) momenta
C) particle nature
D) its wavelength
C
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The magnetic field at a distance of 2 cm from a current carrying wire is 4 ?T. What is the magnetic field at a distance of 1 cm from the wire?
A) 2 ?T B) 4 ?T C) 6 ?T D) 8 ?T E) 10 ?T
Cold dust disks are _____________ disks around main-sequence stars, the dust of which is created by collisions among the planetesimals
Fill in the blank(s) with correct word
The only two forces acting on a body have magnitudes of 20 N and 35 N and directions that differ by 80°. The resulting acceleration has a magnitude of 20 m/s2. What is the mass of the body?
a. 2.4 kg b. 2.2 kg c. 2.7 kg d. 3.1 kg e. 1.5 kg
Newton's Law states that no force is required to keep a moving object in motion. Why, then, do you have to pedal continuously to ride a bicycle along a flat road? ________ force
What will be an ideal response?