Answer:
i think it is iron
Explanation:
its the only one that makes sense to me
Answer:
Chicken and peanut butter lol
Explanation:
Wave speed = (wavelength) x (frequency)
= (4 m) x (2 /sec)
= 8 m/sec
because water is loosely packed but when it is cold it becomes closely packed in order to form ice and thus the force attraction between them also increase.
The launch velocity of the marble launcher is 34.65 m/s
Given that the launch velocity of marble launcher, launches a 25g marble to a distance of 73 cm (0.73 m) and the marble roll up to 6.2 meters before stopping. The launch height is 20 cm (0.2 m).
The time for landing can be calculated by the second equation of motion formula:
h = ut +
g
Let u = 0
0.2 = 0×t +
× 9.8 × 
= 
= 0.04
t = 0.2s
Now, the launch velocity of the marble launcher can be calculated by:
Speed = Distance / Time
Speed = 
Speed = 
Speed = 34.65 m/s
Therefore, the launch velocity of the marble launcher is 34.65 m/s
Know more about Launch velocity: -brainly.com/question/18883779
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