Answer:
1100 m
Explanation:
Given:
y = 0 m
v₀ = 0 m/s
a = -9.8 m/s²
t = 15.0 s
Find: y₀
y = y₀ + v₀ t + ½ at²
0 m = y₀ + (0 m/s) (15.0 s) + ½ (-9.8 m/s²) (15.0 s)²
y₀ ≈ 1100 m
Answer:
Yes.
Explanation:
Displacement is a vector quantity, meaning it has to be a straight graph jointing from starting point to final point and has a direction as well as magnitude and it can also be negative as well as positive and zero.
Displacement is also changes in position (points) of distance. A distance is scalar quantity meaning it only has magnitude and does not have direction. Since distance is scalar quantity, it cannot be negative. Also graph of distance can be a curve graph or any graph.
So when does displacement equal to distance? If an object is moving in straight path or line in one/fixed direction, both displacement and distance are same.
Because if a distance is a straight path and the displacement is simply a straight line (or ray) jointing from starting point to end point, both distance and displacement are both straight path or rays. Since distance and displacement have same graph, we can conclude that both are same in values.
If we go by calculus, given x = 2t as example of straight graph where x stands for position and t stands for time. We can find the displacement from b to a by using the following formulas:
<u>Displacement</u>
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<u>Distance</u>
<u /><u />
v stands for velocity which we can find from:
<u>Velocity</u>
<u /><u />
If you have learnt calculus, first, differentiate x = 2t with respect to t.
Then substitute v = 2 in s and l to find find if both displacement and distance are equal in straight path.
<u>Displacement</u>
<u /><u />
<u>Distance</u>
<u /><u />
Since both displacement and distance are equal when integrating on straight graph, we can conclude that an object moving in straight fixed point has same distance and displacement.
Answer:
Here's what I get
Explanation:
Potassium is in Group 1 and Period 4 of the Periodic Table.
Group 1 elements are called alkali metals.
In general, alkali metals have the following physical properties:
- Silvery white
- Soft enough to cut with a knife
- Relatively low melting points
- Good conductors of heat and electricity.
Their most obvious chemical properties are that they are highly reactive.
They react with atmospheric oxygen to form a dull coating of the metal oxide.
They all react with water to form hydrogen and a basic metal hydroxide.
The reaction of potassium with water (below) is quite vigorous.
1).
Time = (distance) / (speed)
Time = (1000 meters) / (331 m/s)
<em>Time = 3.02 seconds</em>
2).
Acceleration = (change in speed) / (time for the change)
Change in speed = (second speed) - (first speed)
Change in speed = (50 m/s) - (20 m/s) = 30 m/s
Acceleration = (30 m/s) / (5 seconds)
<em>Acceleration = 6 m/s²</em>
The amplitude and wavelength are measured in meters while frequency is measured in decibels.
<h2>
Units of measurement:</h2>
- Amplitude: It is the maximum displacement of the points of the wave from its mean position. Hence it is measured in meters.
- Frequency: It is measured in Hertz. A hertz is a number of waves passed from a single point per second.
- Wavelength: It is the distance between two consecutive crests or troughs. hence it is measured in meters.
- Wave speed: It is measured in m/s.
- Loudness: The loudness of the sound is measured in decibels.
Therefore, the amplitude and wavelength are measured in meters while frequency is measured in decibels.
Learn more about decibels:
brainly.com/question/1851849