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iogann1982 [59]
3 years ago
13

6. Mass affects how fast an object falls. True False

Physics
2 answers:
dimulka [17.4K]3 years ago
6 0

The statement: Mass affects how fast an object falls is true.

Rom4ik [11]3 years ago
3 0

Answer:

False

Explanation:

Mass has nothing to do with the speed of falling objects. Its the gravity which effects the speed of the falling objects and due to the friction/air resistance acting on the body which effects their speed

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. An experimental rocket plane lands on skids on a dry lake bed. If it’s traveling at 80.0 m/s when it touches down, how far doe
kobusy [5.1K]

Answer:

1. A substance that can be separated into two or more substances only by a chemical change is a(n) _____.

solution

element

mixture

compound

2.

Which of the following materials is a substance?

air

gasoline

stainless steel

silver

3.

The first figure in a properly written chemical symbol always is _____.

boldfaced

capitalized

italicized

underlined

4.

Which of the following represents a compound?

H

H-3

H2O

O-16

5. What do chemical symbols and formulas represent, respectively?

elements and compounds

atoms and mixtures

compounds and mixtures

elements and ions

Explanation:

5 0
2 years ago
A scientist compares two samples of white powder. One powder was present at the beginning of an experiment. The other powder was
Jet001 [13]
Density of powder 1 = 0.5 g / 45 cm^3 = 1/90 g/cm^3
Density of powder 2 = 1.3 g / 65 cm^3 = 1/50 g/cm^3

Therefore the densities of the two powders are different, hence chemical reaction has occurred.

(note: none of the other choices make sense.  In fact, a different density does not necessarily indicate a chemical change, see paragraph below).

Density of powders are not definitive unless they are each of the same size and texture.  For example, granular sugar, rock sugar, and icing sugar all have different densities.  I would conclude that this experiment does not lend to a reliable answer.
4 0
3 years ago
If Jeff is sitting in a gaming rocker chair reading instructions is any work being done
Mazyrski [523]
Yes, while he is sitting he is reading something to prepare him to finsh a job. reading instructions can be considered step one in starting a job. ex-before builders are able build, they must read the blueprints in order to know what to do. 
5 0
4 years ago
Here is something to blow your mind. In one slice of "everything" pizza there are 650 Calories (1000 chemistry calories). That e
amid [387]

Answer:

Number of slices of pizza is 993.

Explanation:

It is given that,  in one slice of "everything" pizza there are 650 Calories. The conversion factor from calories to joules is :

1 calorie = 4.184 joules

650 calories = 2719.6 joules

Total energy in the pizza, E = 2700000 J

Let there are n number of slices of pizza. It is given by :

n=\dfrac{2700000}{2719.6}

n = 992.79

or

n = 993

So, there are 993 slices of pizza. Hence, this is the required solution.

6 0
3 years ago
What factors influence the speed of a wave?
fiasKO [112]

Answer: A medium is any substance or region through which a wave is transmitted. The speed of a wave is dependant on four factors: wavelength, frequency, medium, and temperature. Wave speed is calculated by multiplying the wavelength times the frequency (speed = l * f).

3 0
3 years ago
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