A football kicker is attempting a field goal from 44m out. The ball is kicked and just clears the lower bar with a time of flight of 2.9s If the angle of the kick was 45°, what was the initial speed of the ball, assuming no air resistance?
A) 39 m/s B) 2.2 m/s C) 21.5 m/s D) 19.7 m/s
C
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If the Earth's rotational axis were to be perpendicular to the ecliptic, seasonal variations on the Earth would
a. be non-existent. b. remain the same as they are at now. c. have the same severity but each season would last twice as long. d. be much more severe.
The difference between speed and velocity is that
A) they are expressed in different units. B) velocity also includes a direction. C) velocity is the same as acceleration but speed is different. D) velocity is calculated using a physics equation.
In the above model of an atom, where is the neutron located, assuming a neutron is present?
a. A
b. 1
c. 2
d. 3
During which step in the website plan shown above would you determine the website's subsidiary pages?
A. Step 1 B. Step 2 C. Step 3 D. Step 4