The apparent magnitude of a star observed from a distance of 10 pc is called _____
Fill in the blank(s) with correct word
absolute visual magnitude,
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In the figure, an airport luggage-carrying train with a tractor T is pulling three luggage carts, src="https://sciemce.com/media/4/dbb7a8fd287d574913.png" class="w-image" />and cart 
and 
with an acceleration of 1.0 
If T = 300 kg, 
= 200 kg, 
= 100 kg, and 
= 100 kg, then the force in the connection between cart 
is
A. 700 N.
B. 400 N.
C. 200 N.
D. 100 N.
E. 0 N.
A brick and a feather fall to the Earth at their respective terminal velocities. Which object experiences the greater force of air friction?
A) Neither, both experience the same amount of air friction force. B) the brick C) the feather
The volume of an ideal gas changes from 0.40 to 0.51 m3 although its pressure remains constant at 52 000 Pa. What work is done on the system by its environment?
a. 5.7E+3 J b. –5.7E+3 J c. –2.1E+4 J d. 2.1E+4 J e. –2.7E+4 J
A spring (k = 200 N/m) is suspended with its upper end supported from a ceiling. With the spring hanging in its equilibrium configuration, an object (mass = 2.0 kg) is attached to the lower end and released from rest. What is the speed of the object after it has fallen 4.0 cm?
a. 90 cm/s b. 79 cm/s c. 96 cm/s d. 83 cm/s e. 57 cm/s