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svlad2 [7]
3 years ago
10

Meghan explains to Zach the difference between commensalism, mutualism and parasitism. Which sentence(s) did she include in her

explanation? Select all that apply.
A.) A mutualistic relationship benefits only one of the species.
B.) In commensalism, one species is unaffected by the relationship.
C.) Parasitism involves a parasite and a host.
D.) Mutualism is a relationship in which one species preys upon another.
E.) Commensalism is a relationship between two species that compete with each other.
Physics
2 answers:
vlabodo [156]3 years ago
8 0
C is the correct answer I’m sure
Lady_Fox [76]3 years ago
3 0

I believe the answer is C. and B. i apologize if its incorrect.

Hope this helps have a great day

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A large, 34.0 kg bell is hung from a wooden beam so it can swing back and forth with negligible friction. The bell's center of m
Lorico [155]

Answer:

length L of the clapper rod for the bell to ring silently = 0.756m

Explanation:

We are given;

Mass of Bell;m_b = 34 kg

Distance of centre of mass from pivot;d = 0.7m

The bells moment of inertia about an axis at the pivot;I = 18 kg.m²

Mass of clapper;m_c = 1.8 kg

Length of slender rod is L

Now, the formula for period of physical pendulum having small amplitude is given as;

T_b = 2π√(I/mgd)

Where;

I is moment of inertia

m is mass

g is acceleration due to gravity = 9.8 m/s²

d is distance from rotation axis to centre of gravity

Plugging in the relevant values and using mass of bell, we have;

T_b = 2π√(18/(34*9.81*0.7)

T_b = 2π√(18/(34*9.81*0.7)

T_b = 1.745 s

Now, the formula for period for a simple pendulum which is essentially what the clapper rod is would be;

T_c = 2π√(L/g)

Now, we want to find length of clapper L.

Thus, let's make it the subject;

L = g(T_c/2π)²

Now, we are told that for the bell to ring silently, T_b = T_c.

Thus, T_c = 1.745 s.

So,

L = 9.8(1.745/2π)²

L = 0.756m

7 0
3 years ago
Hello<br>what is zenith define it ?​
sertanlavr [38]

Answer:

hi,

When one stands at a particular place, the point in the sky directly above the head is called Zenith.

Explanation:

hope it helps(≡^∇^≡)

good day

thank u ✅

4 0
2 years ago
What does it mean by the fact that the acceleration of a car is 5m/s square??​
dalvyx [7]

Answer:

An acceleration of 5m/s^2 means that the velocity of a body is increasing by 5m/s per second in a certain direction

Explanation:

5 0
3 years ago
A square is cut out of a copper sheet. Two straight scratches on the surface of the square intersect forming an angle theta. The
GarryVolchara [31]

Answer:

<em>a) increases</em>

Explanation:

Almost all substance or material undergoes expansion due to heating. Heat gives thermal energy to the molecules of a substance increasing their body temperature. The temperature of a substance is the measure of the average kinetic energy of the molecules of that substance. When the temperature of a substance increases, the molecules begin to agitate and try to move far from each other, leading to either a linear, area, or cubic expansion, or all three of them. Metals like copper expand very well on heating, and their expansion is relatively minute, but very observable. When the face of such a copper is scratched to give and angle, heating the copper uniformly will cause the copper to expand, leading to an increase in the angle formed.

5 0
3 years ago
Help me with this question, please
Lunna [17]

Answer:

First one is voltage

second is resistance

third is electric current

hope this helped!!

5 0
3 years ago
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