Answer:
Explanation:
The dart will go forward horizontally with velocity of 19 m/s. It will also fall downwards with initial velocity of zero and gravitational acceleration of 9.8 m/s².
Distance PQ covered by the dart can be calculated using the following formula.
s = ut + 1/2 at²
u is initial velocity , a is acceleration and t is time.
Putting the values
s = 0 + 1/2 x 9.8 x .19²
= .1769 m
= 17.69 cm.
Answer:
30 m
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Explanation:
<u>We are given:</u>
Initial velocity (u) = 10 m/s
Final velocity (v) = 20 m/s
Time interval (t) = 2 seconds
Distance travelled by the bus (s) = s meters
<u>Solving for the distance travelled:</u>
<u>Solving for the acceleration:</u>
v = u + at [<em>first equation of motion</em>]
20 = 10 + a(2) [<em>replacing the given values</em>]
2a = 10 [<em>subtracting 10 from both sides</em>]
a = 5 m/s² [<em>dividing both sides by 2</em>]
<u>Solving for the distance:</u>
s = ut + 1/2 (at²) [<em>second equation of motion</em>]
s = 10(2) + 1/2(5)(2)² [<em>replacing the given values</em>]
s = 20 + 10
s = 30 m
Therefore, the bus travelled 30 m in the given time interval
When material stuff is free to move, it moves away from stronger force on it to weaker force on it. OK ? Now take it to the next step: When material stuff is free to flow ... like liquid or gas ... it flows from higher pressure to lower pressure. That's what makes wind, and that's why water comes out of a garden hose when you open the nozzle. It doesn't amaze you at all when you INCREASE the pressure at one end of the straw (blow into it), and air moves DOWN and out of it. So it shouldn't bother you that when you DECREASE the pressure at your end, anything that's free to flow UP the straw will do that.
Answer:
She will use one 2 as a subscript.
Explanation:
Nitrogen is a chemical element with the symbol "N" and has an atomic number of 7. Thus, it is found in group (5) of the periodic table and as such it has 5 electrons in its outermost shell. Therefore, nitrogen has two (5) valence electrons.
On the other hand, oxygen has an atomic number of 8 and with the symbol "O."
When nitrogen and oxygen react chemically, they produce a compound known as nitrogen dioxide
In this scenario, Jenny is studying a compound that has two oxygen atoms and one nitrogen atom. Therefore, the statement which describes the subscripts she will use to write the chemical formula is, she will use one 2 as a subscript.
Where: 2 represents the subscript of oxygen.
I believe the appropriate answer is that at the interface the ray bends way from the normal.
When a ray enters a more dense substance or material (with higher refractive index) , it bends more towards the normal. The amount of bending depends on the change in speed such that is a substance causes the light to speed up or slow down more, it will refract more, and the other factor is the angle of incidence such that if the light is entering the substance at a greater angle, the amount of refraction will be more noticeable.