The speed the ball was projected upwards is 29.7 m/s.
The given parameters;
- height in which the ball was thrown, h = 20 m
- distance traveled by the ball, X = 60 m
The time of motion of the ball to travel to the given height is calculated as;
The horizontal speed in which the ball was projected upwards is calculate as;
X = (v₀ₓ)t
60 = 2.02v₀ₓ
Thus, the speed the ball was projected upwards is 29.7 m/s.
Learn more here: brainly.com/question/20064545
Answer:
B. Ultraviolet.
Explanation:
Io is the fourth smallest moon in the Galilean moons and it is the innermost moon out of the other three moon. It has the highest density as compare to the moon and it has lowest water at its surface.
While it is Jupiter moon it leaves a footprint of magnet over the Jupiter's upper atmosphere. The appearance of this moon look like as a spot of ultraviolet emission that remains fixed underneath Io as Jupiter rotates. So it reflects Ultraviolet radiations.
Well i am not sure i think it is c
Assuming that all the bullet’s energy heats the paraffin, its final temperature is 27.1 degree C. The correct option is D.
<h3>What is temperature?</h3>
Temperature is the degree of hotness and coldness of the material.
The energy of the bullet E = 1/2 mv²
E = 1/2 x 10 x 10⁻³ x (2000)²
E = 2 x 10⁴ J
This heat is used in heating the paraffin
E = m x c ΔT = m x c (Tfinal -Tinitial)
2 x 10⁴ J = 1 x 2.8 x 10³ x (Tfinal -20)
Tfinal = 27.1°C
Thus, the final temperature is 27.1 degree C. The correct option is D.
Learn more about temperature.
brainly.com/question/15267055
#SPJ1
The answer is straw i think