A loud alarm attached to a metal fence begins to ring. Student X has her ear against a pole of the fence while student Y stands away from the fence, as shown below. Both students are the same distance from the alarm. Which of the following statements explains what happens in this situation?

A. Student Y hears the alarm at a higher pitch because gases are denser than solids.
B. Student X hears the alarm at a higher pitch because solids are denser than gases.
C. Student Y hears the alarm first because sound travels faster in gases than in solids.
D. Student X hears the alarm first because sound travels faster in solids than in gases.

Student X hears the alarm first because sound travels faster in solids than in gases.

Sound is a wave, as such, sound waves are able to travel across long distances. The speed of sound is greatest in solids since the gases have a high density owing to the fact that the molecules are closely packed.

Now, we can infer from this that student X hears the alarm first because sound travels faster in solids than in gases.

Learn more about speed of sound: https://brainly.com/question/15381147

Scientists are interested in measuring the effect of pollution on the water quality of a stream. They will use observations of various bottom-
dwelling insects, or macroinvertebrates, collected in the stream as indicators of the physical, chemical and biological conditions within the
stream. Which of the following best describes why macroinvertebrate sampling can be used to assess the overall health of a stream?
Macroinvertebrates live in an aquatic ecosystem for a long enough time to show the chronic effects of pollutants, and many
tend to remain in the same area throughout their life span
B
Macroinvertebrates migrate long distances to feed or reproduce, and they have a low tolerance to pollutants.
Macroinvertebrates are top predators, so they are often used in determining whether toxins will bioaccumulate or
biomagnify in an aquatic environment
D
Macroinvertebrates can be collected to evaluate the effect of various test parameters such as dissolved oxygen, nitrites, and
pH at the time that the sample was taken
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Which of the following is an impact of beach use by humans and vehicles?
A. Decrease in air pollution
B. Decrease in beach erosion
C. Increase in sea water pollution
D. Increase in marine plants and animals

What is the taxonomy order of the dove Orchid

Which type of species produces many offspring, each of which has a small chance of surviving to maturity?

Specialist species
Generalist species
r-selected species
K-selected species

What did Redi find in his experiment?
- Both broths contained living organisms.

- Only the broth with the flask open to the air contained living organisms.

- Flies were found in all of the sealed and unsealed jars of rotting meat.

- Flies were not found in the sealed jars of rotting meat.

My friend (Let's call her "Riley" for safety reasons) says Red Pandas' are Raccoons and I say they are their own family, How do I prove to "Riley" that they aren't Raccoons? Should I use bone structure or should I use something else?

What discovery was made by Alvin?
a.
over 4000 new species of marine life
b.
hydrothermal vents
c.
the Aqualung
d.
the temperature of different parts of the ocean


Please select the best answer from the choices provided

A
B
C
D

List at least 4 conserved processes, molecules, or cell components that support the concept of a universal common ancestor.

ocean surface currents are created b
a) differences in water densitys
b) variations in salinity
c) differences in water temperatures
d) friction with winds

Why is shadow so small ?

10. Can you predict an environmental factor that could influence the floppy ear trait?

I will give brainliest please help ​

Which is a characteristic of a developing country
A:higher mortality rates
B:lower fertility rates
C:higher literacy rates
D:lower mortality rates

how mitochondra help a cell get the materials it needs?

1. According to the diagram, what do you notice about the wolf population?

2. Compare the wolf and the elk population numbers. What do you notice about the elk population as the wolf population increases? Give an explanation for the change in elk population numbers.

3. What do you notice about the aspen, cottonwood, and willow tree populations in relation to the elk and wolf populations? Give an explanation for the change in population numbers for these trees.

What is NOT a
method used
to genetically
modify
organisms?
A. making holes in
the cell to get the
new DNA into the
Cell
B. having bacteria
engulf a cell with the
new DNA
C. using a plasmid
to insert new gene
into the cell of the
organism

Diseases such as colds or influenza are caused by a
O bacterium
O parasite
O fungus
O virus

When blood is drawn, why does it only come out red and not white?​

Which of the following indicators proves that a region with an increasing population is using processes that are sustainable?
O Resources continue to decrease as the population increases.
O Resource availability is staying steady despite a larger population.
O Increased use of one resource is leading to the scarcity of another.
O Air pollution is increasing as the population increases in the area.

Love must be sincere.
Hate what is evil; cling to what is good.
Romans 12:9
Please explain this question, I need it for my bible study

what are the similarities of mitosis and miosis?

Which is TRUE of green
algae?
A. Algae contain vascular tissue.
B. Algae are more similar to plants than protists.
C. Algae have roots.
D. Algae are carnivores.

Which of these units of measurement should be used to measure the length of a eukaryotic cell?
A. meters
B. centimeters
C. millimeters
D. micrometers

Angela wants to conduct an experiment to test how different types of music impact the growth of plants What should Angela use as constant variables in the experiment?

(choices in the picture)

Purpose
a) Construct distance-time graphs from given tabulated data.
b) Describe motion in words, using the graph as point of reference.
c) Calculate and interpret the slopes of the graph.
Materials
Ruler, pencil and graphing paper
Data

Distance
d (m)

Time
t (s)
0 0
20 2
38 4
60 6
79 8
100 10
120 12
138 14

Data for a Bicycle’s Motion

1. Plot the above tabulated data
(distance, d vs t)
2. Describe the graph. What does it show
regarding the motion of the bicycle?
3. Find the slope of the graph. What
does the slope d-t graph
represent?

Part B – Data for the Motion of a Passenger Jeepney

1. Plot the given tabulated data (d vs t)
2. Compute for the slopes of the graph
a. at t = 0 h to t = 2 h
b. at t = 2 h to t = 4 h
c. at t = 4 h to t = 5 h
d. at t = 5 h to t = 8 h
3. What do the slopes show? What does a
positive slope show? A negative slope? A zero
slope?

Distance
d (km)

Time
t (h)
0 0
50 1
100 2
100 3
100 4
150 5
100 6
50 7
0

Which stage involves RNA polymerase
reaching a terminator sequence and
ending transcription of a gene?
A. Termination
B. Initiation
C. Elongation

Photosynthesis inputs

COULD SOMEBODY HEEEEL_P

Ptusem unscrammbled? Science how does your heart work?

If Earth's gravity were much less powerful, our atmosphere would be similar to

the moon's
Saturn's
Jupiter's
Venus'