A rock is thrown upwards at an angle of 40° with respect to the horizontal. As the rock is rising in its trajectory, the horizontal component of its velocity
A) increases.
B) decreases.
C) remains the same.
D) is zero.
E) Cannot be determined without additional information.
C
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A cell's DNA molecules are constructed of
a. amino acids. b. proteins. c. sugars, phosphates, and bases. d. all of the above e. none of the above
What are the three key necessities for all life on Earth?
A) (1) nutrients, (2) energy, (3) liquid water B) (1) liquid water, (2) carbon, (3) oxygen C) (1) nutrients, (2) liquid water, (3) oxygen D) (1) DNA, (2) mutations, (3) liquid water E) (1) DNA, (2) liquid water, (3) oxygen
An object is moving with constant velocity in a straight line. Which of the following statements is true?
A) A constant force is being applied in the direction of motion. B) A constant force is being applied in the direction opposite of motion. C) There are no forces acting on the object. D) The net force on the object is zero. E) There is no frictional force acting on the object.
Compound Microscope: The objective lens of a microscope has a focal length of 2.4 mm and the eyepiece has an angular magnification of 15. The object is positioned 0.060 mm beyond the focal point of the objective. The focal point of the eyepiece is positioned at the real image formed by the objective. The near point of the microscope user is at 25 cm. What is the distance between the objective lens and the eyepiece?
A. 98 mm B. 102 mm C. 107 mm D. 111 mm E. 115 mm