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maks197457 [2]
3 years ago
8

An advertisement for a new fish food claims that lab studies show that fish grew three inches in three weeks while eating the fo

od. Travis wondered if the food was worth the extra cost. To evaluate the claim in the advertisement, Travis should
Physics
1 answer:
Varvara68 [4.7K]3 years ago
6 0
Check the data for the control group to see how much the fish grew without the new food.
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Which structures main function is to produce food (sugar) in a plant
leva [86]
Technically speaking, there are many "levels" of a plant for which this may hold true. I think the one you are referring to is the chloroplast. It takes in the light energy from the sun, water and carbon dioxide, and performs photosynthesis on them to produce sugar and oxygen. A leaf would also fit the description as this is a very general question.
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3 years ago
A train at rest emits a sound at a frequency of 1057 Hz. An observer in a car travels away from the sound source at a speed of 2
il63 [147K]

Answer:

993.52 Hz

Explanation:

The frequency of sound emitted by the stationery train is 1057 Hz.

The car travels away from the train at 20.6 m/s.

The frequency the observer hears is given by the formula:

f_o = \frac{v - v_o}{v}f

where v = velocity of sound = 343 m/s

vo = velocity of observer

f = frequency from source

This phenomenon is known as Doppler's effect.

Therefore:

f_o = \frac{343 - 20.6}{343} * 1057\\ \\f_o = 322.4 / 343 * 1057\\\\f_o = 993.52 Hz

The frequency heard by the observer is 993.52 Hz.

4 0
3 years ago
Examples of uniform speed​
Stella [2.4K]

Answer:

A body is said to be moving with uniform speed, if it covers equal distances in equal intervals of time. ...

6 0
3 years ago
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Winds are the main cause of ___ currents in the ocean
raketka [301]

Winds are the main cause of ocean currents in the ocean.

5 0
3 years ago
An object accelerates at 10 m/s2. If its starting velocity is 20 m/s and it travels for 30 seconds, what is its final velocity?
polet [3.4K]

Answer:

320m/s

Explanation:

Step 1: State your values

s= NOT NEEDED

u=20m/s

v=?

a=10m/s²

t=30 seconds

Step 2: Find a suitable suvat equation:

v=u+at

Step 3:

subsitute values into equation:

?=20+(10x30)

20+300

320m/s

8 0
3 years ago
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