If there is less water in the bottle then the note played is lower, because there is more air to move around. This is one good hypothesis that could lead to a new experiment.
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B. galaxies
Explanation:
Spiral, elliptical, irregular and barred spiral are descriptions of different shapes of galaxies.
A galaxy is a constellation or group of stars.
- A spiral galaxies are the most common and they have spiral arm shapes.
- A barred spiral is made up of spiral shape and bar in the middle.
- Elliptical galaxies are spherical in shape.
- Irregular galaxies are usually not patterned and lacks form.
learn more:
Galaxy recession velocity brainly.com/question/12617031
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Answer:
Fr = 48 [N] forward.
Explanation:
Suppose the movement is on the X axis, in this way we have the force of the engine that produces the movement to the right, while the force produced by the brake causes the vehicle to decrease its speed in this way the sign must be negative.
∑F = Fr
The movement remains forward, since the force produced by the movement is greater than the braking force.
<span>C. mechanical is the answer</span>