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

Physics & Space Science

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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.

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science

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.

Physics & Space Science