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Svetach [21]
3 years ago
12

Which of the following is a good scientific question? A. Are dragons lizards or birds? B. How do star fish fall in love? C. Does

eating less fat increase a mouse's life span? D. Why do crickets chirp?
Physics
2 answers:
Wittaler [7]3 years ago
6 0
<span>C. Does eating less fat increase a mouse's lifespan?
(If a mouse eats less fat in its meals then will it live longer: compared to other mice lives.

</span>This is a testable question that can be answered by designing and conducting an experiment.

I think D could be correct as well.

My final answer is D.


il63 [147K]3 years ago
4 0

Answer:

its C. Does eating less fat increase a mouse's life span?

Explanation:A scientific question cannot be asked about something that does not exist, so the question about dragons is out. Similarly, starfish do not fall in love as far as we know, nor would we have a reliable way of measuring how they did. The cricket question asks only "why?" and lists no variables. The only question left is "Does eating less fat increase a mouse's life span?" This question can be answered by giving different mice various diets and seeing how long they live.

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the force of attraction between two masses is 3.60 Newtons if one of the masses is tripled and the distance between the masses i
skelet666 [1.2K]

Answer: F = 19.2 N

Explanation: Given that the initial Force = 3.6N

The formula involved is

F = GMm/r^2

Substitute the force F

3.6 = GMm/r^2

If one of the masses is tripled and the distance between the masses is quadrupled. We have

3.6 = (G × 3Mm)/(4r)^2

Where G will be constant.

3.6 = 3GMm/16r^2

Separate the fraction of number

3.6 = 3/16 × GMm/r^2

Make GMm/r^2 the subject of formula

(3.6 × 16)/3 = GMm/r^2

19.2 = GMm/r^2

Therefore, the new force of attraction is 19.2 N

4 0
3 years ago
2<br> Ca<br> +<br> O<br> 2<br> →<br> 2<br> CaO<br> What is the product of the reaction
scoray [572]

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

The product in a chemical reaction is written on the Right side of the arrow, so

the product formed here in given reaction is :

  • CaO (Calcium Oxide)
5 0
2 years ago
1. The farthest star listed in the chart is? Arcturus, Capella, Aldebaran, Pollux, Regulus, Castor
Pachacha [2.7K]

Answer:

Regulus

Explanation:

Which is 77.63 light years away

8 0
3 years ago
An electron is travelling in a straight line with a kinetic energy K = 1.60 x 10^-17J. What are (a) the magnitude and (b) the di
faust18 [17]

Answer:

(a) 1000 N/C

Explanation:

Kinetic energy of electron, K = 1.6 x 10^-17 J

distance, d = 10 cm = 0.1 m

Let the potential difference is V and the electric field is E.

(a) The relation between the kinetic energy and the potential difference is

K = e V

V = K / e

Where, e be the electronic charge = 1.6 x 10^-19 C

V = \frac{1.6\times 10^{-17}}{1.6\times 10^{-19}}

V = 100 V

The relation between the electric field and the potential difference is given by

V = E x d

100 = E x 0.1

E = 1000 N/C

(b) The force acting on the electron, F = q E

where q be the charge on electron

So, F = -e x E

It means the direction of electric field and the force are both opposite to each other.

The direction of electric field and the force on electron is shown in the diagram.

5 0
3 years ago
Find :
Pepsi [2]

Answer:

Explanation:

b) Gravity reduces the initial upward velocity to zero in a time of

t = v/g = 40/10 = 4 s

a) h =  v₀t + ½gt² = 40(4) +  ½(-10)4² = 80 m

or

v² = u² + 2as

h = (0² - 40²) / 2(-10) = 80 m

8 0
2 years ago
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