Can anybody help me with 2-7

Answers

Answer 1

Answer: number 5 - newtons 2nd law states that when a force acts on a object it will cause the object to accelerate

Related Questions

Identify the correct formula for each of the following compounds? boron tribromide a. b3br b. bbr3 c. 3bbr
An unknown substance turns blue litmus paper to red. Which additional test could be used to confirm the substance’s identity? It should turn phenolphthalein from colorless to pink because it is a base. It should turn phenolphthalein from pink to colorless because it is a base. It should turn methyl orange to orange because it is an acid. It should turn methyl orange to red because it is an acid.
Select the non-metals. N Br Ca Na Fe
Use exponential notation to express the number 385,500 ha. one significant figure. b. two significant figures. c. three significant figures. d. five significant figures.
According to the cell theory, which of the following is NOT composed of cells?a- algaeb-ironc- bacteria

If an object 18 millimeters high is placed 12 millimeters from a diverging lens and the image is formed 4 millimeters in front of the lens what is the height of the image

Answers

Answer:The height of the image is -6 mm.

Explanation;

Distance of the object form the lens = u = 12 mm

Distance of the image formed from the lens = v = 4 mm

Height of the object = 18 mm= $h_o$

The magnification is given by :

$M=-(v)/(u)=(h_i)/(h_o)$

$h_i\& h_o$ = Height of an image and object respectively.

$M=-(4 mm)/(12 mm)=(h_i)/(18 mm)$

$h_i=-6 mm$

The height of the image is -6 mm.The image formed is real and negative sign signifies that image is inverted.

Which of the following is the most electronegative element? a. He
b. I
c. N
d. O
e. C

Answers

none of these; the most electronegative element is fluorine because an atom of fluorine needs an additional electron to join it's outer membrane, so the atom can achieve stability.

a flourine atom on its own is always a negative ion.

What are metalloids used for

Answers

Since metalloids share qualities of metals and nonmetals, they can be used to alloy (mix) metals.
Also used to make semiconductors.

Which of the following is an acid-base neutralization reaction? (1 point) Sn + 2HBr yields SnBr2 + H2 HCl + KOH yields KCl + H2O 2AlCl3 + 3Ca(OH)2 yields 2Al(OH)3 + 3CaCl2 2C2H6 +7O2 yields 4CO2 + 6H2O

Answers

Answer:

Explanation:

Sn + 2HBr = SnBr₂ + H₂

Here HBr is an acid but Sn is not a base . It is a metal . So it is not an acid - base reaction .

HCl + KOH = KCl + H₂O

HCl is an acid and KOH is a base so it is an acid base reaction.

2AlCl₃ + 3Ca(OH)₂ = 2Al(OH)₃ + 3CaCl₂

It is an acid base reaction . It is so because aluminium hydroxide is a lewis acid and calcium hydroxide is a base . So it is an acid base reaction .

2C₂H₆ +7O₂ = 4CO₂ + 6H₂O

It is not an acid base reaction . It is actually an example of oxidation reaction in which ethane burns in oxygen to give carbon dioxide and water.

The force of attraction that the earth exerts on all objects is called

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The force of attraction that the earth exerts on all objects is called gravitational force. The gravitational force is the force that has the property of attracting any object having a mass. Without this gravitational force it would not have been possible for anything to remain on earth. Everything would start floating without the gravitational pull of earth. There are actually four kind of forces that are considered in physics. They are the strong force, weak force, gravitational force and the electromagnetic force. It is absolutely true that every object is pulling other objects due to the forces present in nature.

The volume of a pond being studied for the effects of acid rain is 35 kiloliters (kL). There are 1,000 liters (L) in 1 kL and 1 mc032-1.jpg 106 microliters (mL) in 1 L. What is the volume of this pond in microliters?

Answers

The volume of a pond being studied for the effects of acid rain is 35 kiloliters (kL). There are 1,000 liters (L) in 1 kL and 1 x 10^6 microliters (mL) in 1 L.

35 kL (1,000 L/ 1kL) (1 x 10^6 microliters / 1 L) = 3.5 x 10^10 microliters

The volume of this pond in microliters is 3.5 x 10^10 microliters

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The science that deals with the study of the stuff that makes up the universe is chemistry??

The ratio of hydrogen atoms to sulfur atoms in sulfuric acid, H2SO4 is