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Fudgin [204]
3 years ago
6

Identifying Characteristics Common to All Protists Use the drop-down menus to complete the statements. All protists live in envi

ronments that are . All protists must . All protists have . All protists make or consume .
Physics
2 answers:
spin [16.1K]3 years ago
5 0

Answer:

Use the drop-down menus to complete the statements.

All protists live in environments that are  

✔ wet

.

All protists must  

✔ reproduce

.

All protists have  

✔ a nucleus

.

All protists make or consume  

✔ food

.

Explanation:

Annette [7]3 years ago
3 0

Answer:

Use the drop-down menus to complete the statements.

All protists live in environments that are

✔ wet

.

All protists must

✔ reproduce

.

All protists have

✔ a nucleus

.

All protists make or consume

✔ food

Explanation:

I got it right hope its the right one

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Two tuning forks, 492 Hz and 498 Hz, are struck simultaneously. How many beats will be heard?
Ket [755]

Answer:

6 beats

If one fork beats once and another twice in the same time period

you would hear 1 beat. (Same for 2 and 3 beats).

5 0
3 years ago
Can we have the Doppler effect with light waves? How?
Mekhanik [1.2K]

Answer:

Besides sound and radio waves, the Doppler effect also affects the light emitted by other bodies in space. If a body in space is "blue shifted," its light waves are compacted and it is coming towards us. If it is "red shifted" the light waves are spread apart, and it is traveling away from us.

Explanation:

7 0
3 years ago
How much kinetic energy does a 50 kg rock has if its moving at a velocity of 2m/s
maria [59]

Answer:

KE = 100 J

Explanation: Should be correct

5 0
3 years ago
A solution with a pH of seven must be <br> A. An acid <br> B. A base<br> C.neutral<br> D.water
Dmitry [639]
A pH scale goes from 0 - 14.
7 is in the middle so it is neutral
7 0
4 years ago
In a mixture of the gases oxygen and helium, which statement is valid: (a) the helium molecules will be moving faster than the o
mixer [17]

Answer:

a

Explanation:

Given:

In a mixture of the gases oxygen and helium, which statement is valid:

(a) the helium molecules will be moving faster than the oxygen molecules, on average

(b) both kinds of molecules will be moving at the same speed

(c) the oxygen molecules will, on average, be moving more rapidly than the helium molecules

(d) the kinetic energy of the helium will exceed that of the oxygen

(e) none of the above

Solution:

- We will use Boltzmann distribution to answer this question. The root mean square speed of molecules of a gas gives the average speed as follows:

                                        V_rms = sqrt ( 3 k T / m )

- Where, k is the Boltzmann constant, T is the temperature and m is the mass of a single molecule of a gas.

- In general, a mixture has a constant equilibrium temperature T_eq.

- So the v_rms is governed by the mass of a single molecule.

- We know that mass of single molecule of Oxygen is higher than that of Helium molecule. Hence, the relation of mass is inversely proportional to square of root mean speed. So the helium molecules will be moving faster than the oxygen molecules.

- Note: The kinetic energy of the mixture remains constant because it is due to the interaction of the molecules within i.e oxygen and helium. Which makes the kinetic energy independent of mass.

                                     E_k = 0.5*m*v_rms^2

                                     E_k = 0.5*m*(3*k*T/ m )

                                    E_k = 0.5*3*k*T

Hence, E_k is only the function of Temperature which we already established to remain constant at equilibrium.

                                   

8 0
3 years ago
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