An object starts from rest at time t = 0.00 s and moves in the +x direction with constant acceleration. The object travels 12.0 m from time t = 1.00 s to time t = 2.00 s. What is the acceleration of the object?
A) -12.0 m/s2
B) 24.0 m/s2
C) -4.00 m/s2
D) 4.00 m/s2
E) 8.00 m/s2
E
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A 0.600-mm diameter wire stretches 0.500% of its length when it is stretched with a tension of 20.0 N. What is the Young's modulus of this wire?
A) 5.66 × 1010 N/m2 B) 3.54 × 109 N/m2 C) 1.41 × 1010 N/m2 D) 6.43 × 109 N/m2 E) 2.78 × 109 N/m2
Which of these does NOT exist?
A) a million solar mass black hole B) a 6 solar mass black hole C) a 6.8 solar mass neutron star D) a 1.0 solar mass white dwarf E) a 0.06 solar mass brown dwarf
About 90% of the star's total life is spent on the main sequence
Indicate whether the statement is true or false
A 1 300-kg automobile moving at 21 m/s has the brakes applied with a deceleration of 3.0 m/s2 . How far does the car travel before it stops?
a. 7.4E+1 m b. 1.5E+2 m c. 2.9E+5 m d. 2.3E+4 m e. 4.3E+2 m