A dragster starts from rest and travels 1/4 mi in 6.70 s with constant acceleration. What is its velocity when it crosses the finish line?
A) 296 mi/h
B) 269 mi/h
C) 188 mi/h
D) 135 mi/h
B
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Convection in the outer layers of a star like the Sun helps mixing and makes more hydrogen available for burning.
Answer the following statement true (T) or false (F)
The white dwarf that remains when our Sun dies will be mostly made of
A) hydrogen. B) helium. C) carbon. D) neutrons.
If a liquid does not wet the inner surface of a capillary tube inserted into it, the cohesion of the liquid is ________ the adhesion between the liquid and surface
A) less than B) greater than C) the same as
An object weighing 44.1 N hangs from a vertical massless ideal spring
When set in vertical motion, the object obeys the equation y(t) = (6.20 cm) cos[(2.74 rad/s)t - 1.40]. (a) Find the time for this object to vibrate one complete cycle. (b) What are the maximum speed and maximum acceleration of the object. (c) What is the TOTAL distance the object moves through in one cycle. (d) Find the maximum kinetic energy of the object. (e) What is the spring constant of the spring.