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maxonik [38]
3 years ago
10

A scientist completely dissolves gaseous oxygen into a container of liquid water. Which of the following best describes the cont

ents of the container after the oxygen has been dissolved?
A.
an element
B.
a solution
C.
a compound
D.
a substance

STUDY ISLAND
Physics
2 answers:
soldier1979 [14.2K]3 years ago
8 0

Answer:

c

Explanation:

sdas [7]3 years ago
5 0

Answer:

Forgive me if I'm wrong but I think the answer is C.

Explanation:

I say this because liquid water is H20 (a combination of two elements) and Oxygen is a singular element. Compound is defined as a thing that is composed of two or more separate elements and thus, I think it's C.

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REY [17]

Answer:

A+B+C=7j+k

Explanation:

A=3i+4j

B=2i-2j+4k

C=i+5j-3k

A=3i+4j

+

B=<u>2</u><u>i</u><u>-</u><u>2</u><u>j</u><u>+</u><u>4</u><u>k</u>

i+2j+4k

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4 0
2 years ago
Part 1: What is your Reaction Time?
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Answer:

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3 years ago
A steel piano string of mass per unit lenght 4×10-⁴kgm-¹ was struck, if the speed of the sound on the string is 300ms-¹. Calcula
Snezhnost [94]

Answer:

36 N

Explanation:

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The ideas that the universe began at a single point and has been expanding since its formation are the main premises of which of
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6 0
3 years ago
A terrorist throws a grenade with a 6.00 second fuse off a building 150.0 m high at a speed of 10.0 m/s. If the angle at which t
igomit [66]
Here we have a projectile motion. It is type of motion that is made of a vertical shot and a horizontal shot. This is how we will solve it.

Firste step is to find horizontal and vertical component of a speed.
v_{0x} =v_{0} * cos \alpha \\ v_{0y} = v_{0} * sin \alpha [/tex]

We are given this information:
v_{0} = 10 m/s \\ h=150m \\  \alpha =-30°
Angle is negative because it is below the horizontal.

VERTICAL SHOT
Time needed for a grenade to fall to the bottom of a building is given by a formula:
t= \frac{ v_{0y} }{g}  \\ t= \frac{v_{0} * sin \alpha}{g}  \\ t= \frac{-10*sin(-30)}{9.81} \\ t=0.51s
We used negative value for a speed because it is considered that upwards shot has positive value and downwards shot has negative value.

The grenade will not explode before it hits the ground.


HORIZONTAL SHOT
<span>The horizontal distance from the building at which the grenade will land is called range. The formula for a range is given by:
</span>R= v_{0x} * \sqrt{ \frac{2h}{g} } \\ R=v_{0} * cos \alpha* \sqrt{ \frac{2h}{g} } \\ R=10*cos(-30)* \sqrt{ \frac{2*150}{9.81} } \\ R=47.89m 

The grenade will hit the ground at distance of 47.89m.
7 0
3 years ago
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