A boy kicks a football with a certain initial velocity at an angle 20° above the horizontal. In 2.0 seconds, the ball reaches at its highest point in its trajectory. What is the initial velocity of the ball?
A) 9.8 m/s
B) 20 m/s
C) 57 m/s
D) 4.9 m/s
E) 29 m/s
C
Physics & Space Science
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Listed following are distinguishing characteristics and examples of reflecting and refracting telescopes. Match these to the appropriate category.
Physics & Space Science
A 200-? resistor, a 40.0-mH inductor and a 2.00-?F capacitor are connected in series with a 120-V rms source at 1000 Hz
(a) What is the impedance of this circuit? (b) What is the phase angle of this circuit?
Physics & Space Science
Calculate the range of the force that might be produced by the virtual exchange of a proton. Assume ?E??t = h/2?. (mp = 1.67 × 10^?27 kg, c = 3.00 × 10^8 m/s, and h/2? = 1.05 × 10^?34 J?s)
a. 6.72 × 10^?25 m b. 2.10 × 10^?16 m c. 6.00 × 10^?8 m d. 1.54 × 10^?15 m
Physics & Space Science
Where does a page number go in an APA paper?
Physics & Space Science