When comparing a star’s absolute magnitude to its apparent magnitude, which is usually the case? select all that apply.
a star’s absolute magnitude can be brighter than its apparent magnitude.
a star’s apparent magnitude can be brighter than its absolute magnitude.
a star’s absolute magnitude can be equal to its apparent magnitude.
no star’s apparent magnitude is greater than the sun’s apparent magnitude.
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Ответ:
All four choices are true statements !
(I've never seen that before in a question.)
Ответ:
Explanation:
Applying conservation of momentum
mv = MV
M and V are mass and velocity of recoil of canon , m and v are mass and velocity of tennis ball
54 x 10⁻³ x v = 1.27 x 7.8
v = 1.27 x 7.8 / 54 x 10⁻³
v = 183 m/s.