While a star is being observed through a telescope, the visible light coming from the star shifts from red to blue.
which is true about this star? i know for sure it's either b or c
a.
the shortening of wavelengths indicates that the star is moving away from earth.
b.
the lengthening of wavelengths indicates that the star is moving toward earth.
c.
the lengthening of wavelengths indicates that the star is moving away from earth.
d.
the shortening of wavelengths indicates that the star is moving toward earth.

An uplifted block of rock between two normal faults

Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?