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3 years ago

Use the periodic table from the lesson to answer the following question. The atomic mass of F is ___. 9 10 19 55

Physics

2 answers:

Basile [38]3 years ago

7 0

18.9 but round it and you get 19

almond37 [142]3 years ago

4 0

<h2><u>What is the atomic mass of the element F?</u></h2><h3>A. 9</h3><h3>B. 10</h3><h3>C. 19</h3><h3>D. 55</h3><h3><u>Answer</u></h3>

In this case if given those choices your answer would be (C. 19).

However in more complicated Chemistry rules you would learn that the periodic table only showcases 1 of the many possible masses of the element.

Hope this help! :D

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A truck traveling at a constant speed of 40.0 km/h applies its brakes and comes to a complete stop in 5.0 s.

I am Lyosha [343]

Answer:

Part a)

$v = 11.11 m/s$

Part c)

$a = -2.22 m/s^2$

This mean the truck is decelerating and its speed is decreasing

Part e)

$t = 13.89 s$

Part f)

$d = 77.14 m$

Explanation:

Part a)

Speed of the truck is given as

$v = 40 km/h$

as we know that

1 km = 1000 m

1 h = 3600 s

so we will have

$v =40 \times \frac{1000}{3600} m/s$

$v = 11.11 m/s$

Part c)

Average acceleration is given as

$a = \frac{v_f - v_i}{t}$

now we have

$a = \frac{0 - 11.11}{5}$

$a = -2.22 m/s^2$

Part e)

as we know that it is uniform acceleration

so we can say

$v_f - v_i = at$

$11.11 - 0 = 0.80 t$

$t = 13.89 s$

Part f)

distance traveled by the truck is given as

$d = \frac{1}{2}at^2$

$d = \frac{1}{2}(0.80)(13.89^2)$

$d = 77.14 m$

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3 years ago

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A ball rolls along the floor with a constant velocity of 6m/s. How far will it go in 10 sec?

agasfer [191]

Answer:

60 m

Explanation:

Since it goes 6 m per second, and it goes for 10 seconds, then you'd just multiply 6 x 10, to get that the ball would roll 60 m in 10 seconds.

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3 years ago

Someone helpppp! <br>1.can you explain the three important reasons <br>why we use machines?

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1: to do work faster.
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3: to save labours

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2 years ago

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The pharyngeal tonsil is found in the __________________________ .

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Answer:

<em>The pharyngeal tonsils are located near the opening of the nasal cavity into the pharynx. When these tonsils become enlarged they may interfere with breathing and are called adenoids.</em>

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3 years ago

Abnormal protrusion of the eye out of the orbit is known as

kifflom [539]

Answer:

Exophthalmos

Explanation:

Exophthalmos is a disorder which can be either bilateral or unilateral. Sometimes it is also known by other names like Exophthalmus, Excophthamia, Exobitism.

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It is commonly caused by trauma or swelling of eye surrounding tissues resulting from trauma.

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3 years ago