Your eye's iris changes the size of your pupil to adjust the amount of light that enters your eye
Indicate whether the statement is true or false
T
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What evidence do we have that life arose fairly quickly on Earth?
What will be an ideal response?
The monthly (30 days) electric bill included the cost of running a central air-conditioning unit for 2 hr/day at 5000. W, and a series connection of ten 60. W lightbulbs for 5 hr/day
How much did these items contribute to the cost of the monthly electric bill if electricity costs 8ยข per kW-h?
The rigid body shown rotates about an axis through its center of mass and perpendicular to the paper. If M = 2.0 kg and L = 80 cm, what is the kinetic energy of this object when its angular speed about this axis is equal to 5.0 rad/s? Neglect the mass of the connecting rod and treat the masses as particles
a.
18 J
b.
15 J
c.
12 J
d.
23 J
e.
26 J
An automobile travels due north with a speed of 77 km/h that is decreasing. All forces considered, the unbalanced force acting on the auto is
a. zero. b. southward. c. northward. d. downward. e. upward.