At a location where g = 9.80 m/s2, a projectile returns to its original height after 4.08 seconds, during which time it travels 76.2 meters horizontally. If air resistance can be neglected, what was the projectile's initial speed?
What will be an ideal response?
27.4 m/s
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A light source at a distance of 1 meter that emits 50 watts of visible radiation has the same ________ as a source emitting 200 watts and is located ________.
A. luminosity; 4 meters away B. apparent brightness; 4 meters away C. apparent brightness; 2 meters away D. luminosity; 2 meters away
A cylindrical drinking glass has a diameter of 2.5 in. and is 5.5 in. tall. What is the volume of the drinking glass in cubic centimeters? (2.54 cm = 1.00 in.)
A) 170 cubic cm B) 440 cubic cm C) 350 cubic cm D) 710 cubic cm E) 530 cubic cm
Which element is used in safety flares and fireworks because it burns so brightly?
a. Potassium b. Magnesium c. Carbon d. Chlorine
An electron is released such that its initial velocity is from right to left across this page. The electron's path, however, is deflected in a direction toward the bottom edge of the page due to the presence of a uniform magnetic field. What is the direction of this field?
a. from bottom edge to top edge of the page b. into the page c. from right to left across the page d. out of the page