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andreev551 [17]
3 years ago
14

Simple machines make work easier. Most simple machines reduce the amount of effort force needed to move an object. This cart has

a set of wheels. The wheels are actually simple machines: the wheel and axle. How can we change these wheels to decrease the amount of effort force needed to move the wagon?
A) Use a larger wheel and axle.
B) Make the radius of the axle larger in diameter.
C) Make the radius of the wheel larger in diameter.
D) Make the radius of the wheel smaller in diameter. ( D is incorrect. )
Chemistry
2 answers:
tino4ka555 [31]3 years ago
7 0
Sorry I skate and usually the smaller wheel rolls faster. Try C. then It's like longboard wheels they roll pretty fast.
dangina [55]3 years ago
3 0
Make the radius of the wheel and axle larger in diameter
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B. Cl- has 17 electrons.

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In an exothermic process the surrounding looses heat.<br>False<br>True​
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How is a compound different from an element 2.3 lesson check?
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<em>Answer:</em>

  1. Element: Element are pure substance consist of same type of atoms
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<em>Distinguish features:</em>

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<em>Example:</em>

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3 years ago
X^2+13x+30<br> How do I factor this?<br> will give brainiest
podryga [215]

Answer:

(x+10) (x+3)

Explanation:

1) this quadratic equation is in the form of: ax^2+bx+c

where we need to figure out what*what=c(30)

and what+what=13(b)

factors of 30:  -1,-30  1,30  2,15  -2,-15  3,10  -3,-10  5,6   -5,-6

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lets substitute 3 and 10 in lace of 13x to factor by grouping:

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make two sets:

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set b) 10x+30

the GCF in set a is "x":

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The Gcf in set b is 10:

10(x+3)

now combine the terms outside the parantheses:

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3 years ago
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Classify each of the following as either a physical change or a chemical change.
Mkey [24]

Answer:

(a) Dissolving sugar in water  ⇒ physical change

(b) Crushing rock salt  ⇒ physical change

(c) Burning sulfur  ⇒ chemical change

(d) Digesting a chili dog ⇒ chemical change

Explanation:

<em>Physical changes</em> are those in which the substance does not alter its composition. They only involve changes of states of  matter and the chemical substance is stil the same after the change occurs. By other hand, <em>chemical changes</em> are those in which new subtances are formed. So, the subtance is not the same after the change.

(a) Dissolving sugar in water  ⇒ <em>physical change</em>; because we obtain a solution of sugar in water (sugar is stil sugar).

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(c) Burning sulfur  ⇒ <em>chemical change</em>; because sulfur is oxidized (chemical reaction) and new compounds are formed, for example sulfur dioxide.  

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