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dlinn [17]
2 years ago
11

Bats and marine mammals are able to locate prey and to communicate by sending and receiving sound waves that echo off surface. E

chos demonstrates the wave property of A: absorption, B: diffusion, C: transmission, or D: reflection
Chemistry
2 answers:
Nesterboy [21]2 years ago
8 0
I’m pretty sure it’s S
Nataliya [291]2 years ago
8 0
D, since your using echo, it reflects of the object or animal.
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6 0
2 years ago
2) Write a hypothesis for the Observation and question below. Be sure to use the proper “If…, then…” format in your answer. Iden
Anna [14]

Answer:

If one astronaut used more force, then that one would be faster than the other. The independent variable is force. The dependent variable is speed.

Explanation:

Force is what is to be changed. Speed is what is being measured.

IV = Changed/factor DV=Measured/Changes by factor

4 0
3 years ago
Elle wanted to test how temperature affects the rate of evaporation. She had three setups:
Pie

Answer:

Temperature

Explanation:

Here the factor that Elle is controlling is the temperature. So temperature here is the independent variable and the dependent variable is the rate of evaporation of water.  Independent variable is controlled during the experiment setup and the outcome of the dependent variable depends on the independent variable.

5 0
3 years ago
Write the mole ratios of (2ca+o2➡2cao)
tresset_1 [31]
N(Ca)/2 = n(O)/1 = n(CaO)/2

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Hope this helped!!
6 0
3 years ago
Read 2 more answers
A 38.6 kg marble slab is shown above. What is its density? Give your answer to the nearest tenth.
LuckyWell [14K]

Answer:

Density, d=26.7\ g/cm^3

Explanation:

The attached figure shows a 38.6 kg marble slab. The dimensions of the marble slab is 23 cm × 17 cm × 4 cm

Density = mass/volume

Volume of a cuboid shape is equal to, V = 23 cm × 17 cm × 4 cm

V = 1564 cm³

Density,

d=\dfrac{38.6\times 10^3\ g}{1564\ cm^3}\\\\d=24.68\ g/cm^3

or

d=26.7\ g/cm^3

So, the density of the marble slab is 26.7\ g/cm^3.

6 0
3 years ago
Read 2 more answers
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