A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown, assuming negligible air effects?
A) 6.1 m/s
B) 7.4 m/s
C) 8.1 m/s
D) 8.9 m/s
C
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How long does it take for a star like our Sun to form?
A) 100 thousand years B) Two million years C) Fifty million years D) One billion years E) 4.6 billion years
A planet with an albedo of 10 percent absorbs 10 percent of the sunlight that strikes it and reflects the other 90 percent
Indicate whether the statement is true or false
Which of the following is a similarity between Frederick W. Taylor and Lillian Gilbreth?
a.They both developed time study. b.They both strove to simplify work. c.They both proposed giving workers longer work hours and fewer breaks. d.They both used film cameras to analyze jobs.
A coil lies flat on a horizontal tabletop in a region where the magnetic field points straight down. The magnetic field disappears suddenly
When viewed from above, what is the direction of the induced current in this coil as the field disappears? A) counterclockwise B) clockwise C) clockwise initially, then counterclockwise before stopping D) There is no induced current in this coil.