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Ymorist [56]
2 years ago
9

A student has a block of wood. She places it on a wooden desk. She uses a spring scale to measure how much force is needed to sl

ide the block of wood across the desk. The student then places the block of wood on a piece of sandpaper and repeats the process. The type of force
the student is investigating is _______.

A. gravitational
B. magnetic
C. electricity
D. friction
Chemistry
2 answers:
yarga [219]2 years ago
6 0
D:friction



Reason:because they are trying different types of things to rub against it and see if it will slow it down



Please give me the bran list answer !
Firdavs [7]2 years ago
4 0
D: i know this is correct not much behind that tho
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Please help this is due today! 5-11-2021
Licemer1 [7]

Answer:

- The chemical reaction is not balanced. There is two oxygens on the reactant's side while there's only one oxygen on the products side.

- I would not say it's following the law of conservation of mass as it's not a balanced equation.

- To balance this equation, you would need to add the coefficient of '2' to Magnesium (Mg) on the reactants side, and add the coefficient of '2' to the products side.  This would make it so that there's 2 Mg's and 2 O's on both the reactant's side and products side.

edit: I hope this helped you in some way. ^^

8 0
2 years ago
Do all forms of radioactive decay change the identity of the original element?
hoa [83]

Explanation:

<h3>yes, Radioactive decay involves the emission of a particle and/or energy as one atom changes into another. In most instances, the atom changes its identity to become a new element.</h3>

5 0
2 years ago
In the balanced chemical reaction for the combustion of acetylene (used in welding torches), determine at standard temperature a
Tpy6a [65]

Answer:

8L of CO2

Explanation:

The equation for the reaction is given below:

2C2H2 + 5O2 —> 4CO2 + 2H2O

From the equation above,

5L of O2 produced 4L of CO2.

Therefore, 10L of O2 will produce = (10 x 4)/5 = 8L of CO2

Therefore, 8L of CO2 is produce

8 0
3 years ago
Why does aluminium oxide (Al2O3) have a higher melting point than sodium oxide (Na2O)?
Lilit [14]

Al2O3 has a higher melting point than Na2O. This is because the ionic bond between Al3+ ions and O2- ions is stronger than that between Na+ and O2-. The charge on the Al3+ ion is larger than that of the Na+ ion

5 0
3 years ago
Why don't protins stick together
irinina [24]
Because proteins are basically building blocks which mean that they only fit to specific pieces.
3 0
2 years ago
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