Answer:
t=distance ÷ speed
23÷70
t=0.33 sec
3) While driving home you see a deer leap out in front of you car. If you slam on your breaks to avoid hitting the deer, and it slows you down from 20m/s to 10m/s in 2 seconds what was your acceleration during this time?
Answer:
Hope that helps...thats the formular you use when it involves two speeds
The temperature of the universe is gradually ____ (The answer is not a number)
Answer:
its decressing, or getting colder
Explanation:
hope this helps
branilest plzz
Is a fine for speeding based of the average speed or the instantaneous speed? Explain
Answer: Therefore, the instantaneous speed is only the answer, because, the detector can only detect the instantaneous speed but not the average speed.
Explanation:
what is the relationship between the variables on this graph? The temperature does not have an effect on flow time. As the temperature increases, the flow time increases. As the temperature increases, the flow time decreases.
Answer: As the temperature increases, the flow time increases.
Explanation: i took the test
The relationship between the variables on this graph is that As the temperature increases, the flow time increases, therefore the correct answer is option B.
What is the kelvin scale of temperature?It is a scale of temperature used to measure the temperature, the kelvin scale of temperature is also known as the absolute scale of temperature.
The Standard International unit of thermodynamic temperature is the kelvin, often known less frequently as the degree Kelvin. The formal definition of one kelvin is 1/273.16 of the thermodynamic temperature of pure water's triple point.
As shown in the graph as the temperature increase across the X axis the flow time is increasing as well, these two variables are directly proportional to each other.
Thus, The graph shows a link between the variables, showing that when the temperature rises, flow time also rises, hence option B is the proper response.
Learn more about the kelvin scale of temperature from here,
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1:
a change in velocity?
Section 4.4
7. What is the acceleration of a car moving
along a straight-line path that increases its
speed from zero to 100 km/h in 10 s?
S
1
2
[tex]\\ \tt\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]
[tex]\\ \tt\longmapsto Acceleration=\dfrac{2.7-0}{2}[/tex]
[tex]\\ \tt\longmapsto Acceleration=\dfrac{2.7}{10}[/tex]
[tex]\\ \tt\longmapsto Acceleration=27m/s^2[/tex]
Answer:
Initial velocity=u=0m/sFinal velocity=100km/h=v=100×5/18=500/18=2.7m/sTime=t=10s⟼Acceleration=tv−u
⟼Acceleration=22.7−0
⟼Acceleration=102.7
⟼Acceleration=27m/s2
A student conducts an experiment to test how the temperature affects the amount of sugar that can dissolve in water. In the experiment, she uses 100 milliliters of water in each trial and stirs for five minutes each time.
What is the independent variable in this experiment?
A. the amount of water
B. the temperature of the water
C. the amount of sugar
how do you measure the volume of irregular object? explain with diagram
Answer:
by using graphical meythod
Benjamina started her walk from the front door of her ground-floor apartment. She walked 6 meters to the corner of the building and then turned the corner and walked 10 meters to her friend’s apartment. Identify the difference between the distance she walked and her displacement.
Answer:
The change in her position (from beginning to end), along with the direction, is considered her displacement.
Explanation:
Answer:
The change in her position ( from beginning to end), along with the direction, is considered her displacement. This value is a measurement and a direction. The total distance along the path from her starting point to her endpoint is considered her distance. This value is a measurement only.
Two objects of masses 50 g and 100 g are moving along the same line and direction with velocities of 5 m/s and
10 m/s respectively. They collide and after collision, the second object moves at a velocity of 8 m/s. Determine
the velocity of the second object.
Answer:
M1 v1 + M2 v2 = M1 V1 + M2 V2
Assuming we are to fine V2 (the problem is not clear on this point)
50 * 5 + 100 * 10 = 50 * 8 + 100 V2 conservation of momentum
V2 = (250 + 1000 - 400) / 100 = 850 / 100 = 8.5 m/s
Which of the following is a vector quantity?
a. distance
b. time
c. speed
d. displacement
Answer:
d. displacement
Explanation:
Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
.A path for electricity is
a circuit
a light bulb
an ampere
a current
Answer:
A path for electricity is current
Don't let yesterday take up too much of today.
Explanation:
A path for electricity is a circuit.hope it helps.stay safe healthy and happy.A man is inside an airplane and walking toward the back of the plane at 7 m/s. The plane is flying West at 245 m/s. What is the speed and direction of the plane relative to the man?
7 m/s East
238 m/s, East
252 m/s West
238 m/s, West
Answer:
7 m/s East
Explanation:
The speed of the man relative to the plane is given as 7 m/s. Given that he's walking in the corridor of the plane, this is his speed relative to the plane. Since he's moving to the back of the plane, and the aircraft is headed to west, the man's direction relative to the plane is East.
Abigail Folgers’s dying words were ?
Answer:
"My God is an amazing God."
Pls will give brainliest!! How is an atom categorized when it gains an extra electron, and how is it categorized when it loses an electron?
why is there more potential for wind energy in the upper himalayan in nepal?
Answer:
The potential area of wind power in the country is about 6074 sq. km with wind power density greater than 300 watt/m2. More than 3,000 MW of electricity could be generated at 5 MW per sq km. The commercially viable wind potential of the country is estimated to be only about 448 MW.
a solid copper sphere will sink in water while a hollow copper sphere of the same mass may float.explain this observation
Answer:
According to archemdes principle ,if an object displace more water that its volume then it will sink in water
As The hollow sphere of same mass have high volume ,so it will float and solid copper with less volume will sink ....
Explanation:
Plz mark me as brainliest ,I badly need it
7. A car travels a certain distance with a speed of
50 km/h and returns with a speed of 40 km/h.
Calculate the average speed
Plz help
the _____ of an element tells you the amount of protons that the atom carries.
Answer:The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.
Explanation:
Which property of a quarter is different on the International Space Station than it is on Earth?
Its mass
Its weight
Its volume
Its density
3. Define One meter length
Answer:
100cm or 1.09361yards or 1000mm
Explanation:
The meter, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s-1, where the second is defined in terms of ΔνCs.
flood and landslides occur more in rainy season, why
Explanation:
When the water level in Neapl's over 6,000 rivers and creeks, flowing north to South, swells up during the monsoon season, they wreak havoc in the downstream communities of the plains .
A train on a straight track goes in the positive direction for 5.9 km, and then backs up for 3.8 km
Answer:
2.1km
Explanation:
Ill take it as u are talking about the displacement
Since displacement has negatives and positves
5.9 - 3.8 = 2.1km
what are the three equation of motion
Explanation:
Three equations of motion are as follows:-
v=u+ats=ut+(1/2)at²v²=u²+2asPlssss help!!! look at the photo :)
convert 300 k into Celsius scale
Answer:
Given, kelvin temperature = 300 K
C = K – 273.15
C = 300 – 273.15
C = 26.85
Therefore, 300 Kelvin is equal to a celsius temperature of 26.85 °C
Hope this helps u
derive the formula v= u+ at
please derive in detail
Lets do
We know
The rate of change of velocity is acceleration .
[tex]\\ \sf\longmapsto a=\dfrac{dv}{dt}[/tex]
[tex]\\ \sf\longmapsto dv=adt[/tex]
Integrate both sides
[tex]\\ \sf\longmapsto \int dv=a\int dt[/tex]
As acceleration is constant .Take it outside of integral .On velocity we can take limit u to v and time from 0 to t
[tex]\\ \sf\longmapsto {\displaystyle{\int}}^v_u dv=a{\displaystyle{\int}}^t_0 dt[/tex]
Hence
[tex]\\ \sf\longmapsto v{\huge{|}}^v_u=at[/tex]
[tex]\\ \sf\longmapsto v-u=at[/tex]
[tex]\\ \sf\longmapsto v=u+at[/tex]
Solve using correct significant figures and indicating maximum absolute uncertainty.
(0.0336 ± 0.0002 mol - 0.010 ± 0.001 mol)(255.4 ± 0.4 g/mol)=
The criterion of significant figures can to find the result with reliable figures
X = 9.2 10⁻⁵
now with the propagation of errors we obtain the result with its uncertainty
X ± ΔX = (9.2 ± 0.5) 10⁻⁵
given Parameter
* expression values with their absolute errors
to find
* the result with the correct significant figures
* the absolute error of the expression
Significant figures are defined with the number of decimals that give information, the number of figures in a quantity gives information about the uncertainty of this quantity.
There are two criteria for applying significant figures:
* Add and subtract the result of going with the number of decimal places of the figure that has the least
* Product and division as a result of going with the least number of significant figures than the value that has the least.
Remember that the zero to the left do not form a pair of the significant figures
Let's apply this belief to the case presented, let's write the precaution
[tex]x = \frac{a-b}{c}[/tex]
where in this case they are worth
a = 0.0336 ± 0.0002
b = 0.010 ± 0.001
c = 255.4 ± 0.4
We see that the significant figures of each parameterize (a, b, c) and their absolute errors are correct.
Let's apply the criteria to the operation
a-b = 0.0336 - 0.010
a- b = 0.0236
we apply the criterion of significant figures for the subtraction, the result must be with 3 decimal places
a - b = 0.024
let's do the other operation
X = [tex]\frac{a-b}{c}[/tex]
X = 0.024 / 255.4
X = 9.24 10⁻⁵
We apply the criterion of significant figures for the division, in this case the result is left with two significant figures
X = 9.2 10⁻⁵
The uncertainty or error of the measurements is of most importance as it determines how many significative figures are reliable at a given magnitude.
If the magnitudes are measured with some type of instrument, the absolute error is given by the appreciation of the instrument, if the magnitude is calculated using some equation, the errors must be propagated using the variations of each parameter in the worst case.
the uncertainty of the calculated quantity (X) is
[tex]\Delta X = | \frac{dX}{da}| \Delta a + | \frac{dX}{db} | \Delta b + | \frac{dX}{dc}| \Delta c[/tex]
let's perform the derivatives
[tex]\frac{dX}{da} = \frac{1}{c}[/tex]
[tex]\frac{dX}{db} = - \frac{1}{c}[/tex]
[tex]\frac{dX}{dc} = - \frac{a-b}{c^2}[/tex]
we substitute
remember that the bulk value guarantees that we tune the worst case. So all the mistakes add up
ΔX = [tex]\frac{1}{c}[/tex] Δa +
ΔX = (Δa + Δb) + Δc
we substitute
ΔX = [tex]\frac{1}{255.4}[/tex] (0.0002 + 0.001) + [tex]\frac{0.0336-0.010}{255.4^2}[/tex] 0.4
ΔX = 4.698 10⁻⁶ + 1.45 10⁻⁷
ΔX = 4.8 10⁻⁶
Absolute errors must be given with a single significant figure
ΔX = 5 10⁻⁶
The result of the requested quantity using the criterion of significant figures and propagation of errors is
X ± ΔX = (9.2 ± 0.5) 10⁻⁵
learn more about significative figure here:
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why energy crisis may create big problem in the near future.
Answer:
Most energy crises have been caused by localized shortages, wars and market manipulation. Some have argued that government actions like tax hikes, nationalisation of energy companies, and regulation of the energy sector, shift supply and demand of energy away from its economic equilibrium.
State four (4) Forms (abstracts) that the liberated prisoner confronts and the copy of each of those Forms (tangible, finite, concrete, identifiable by sensory perception).
The four abstract forms and their tangible copies that apply to the liberated prisoner in the myth of Plato's cave are:
1. Astonishment.
Copy: Elevation of the eyebrows and opening of the mouth.2. Anger.
Copy: Screaming.3. Happiness.
Copy: Laugh.4. Alienation:
Copy: Crying.The feelings of the liberated prisoner in the myth of Plato's cave.
Once the prisoner is released by figures that do not correspond to shadows but to tangible beings that can lift him or even pull or drag him, the first form he must experience is astonishment, identifiable by his copy, which would be the raising of the eyebrows and / or or the opening of its mouth reflecting that shape.
Next, the myth of the cave tells us that the man was forced to leave the cave, for which the experienced form must have been anger, reflected in his copy that would be possible shouts towards the people who take him out of the cave and they make you walk on rough terrain.
Later, once the liberated man accustoms his eyes and can see more defined forms such as trees, people or even the sun, his form is joy, whose copy is laughter, out of laughter if that is the case, being now aware of a whole new that I did not know.
Once the freed prisoner returns to the cave, having a different concept about the reflected shadows to which his companions are accustomed, the abstract form is alienation, followed by his copy that is crying, since he will surely be excluded by his acquaintances. , which I would be trying to help.
If you want to know more about Plato, you can see these links:
https://brainly.com/question/18149150?referrer=searchResults
https://brainly.com/question/15079469?referrer=searchResults
How does the field of science gain knowledge and understanding?
A basic question about how science gains knowledge.
Science gains knowledge using the scientific method.
The first thing you need to understand here is the scientific method, with all the steps and a little explanation to each one.
Ask a question or find some problem to solve: (what you want to understand? In what area do you want to find new knowledge?) Perform research: (There is some existing knowledge in that topic?) Establish your hypothesis: (This is what you can conclude with the things you know, or what you expect to find) Test your hypothesis by conducting an experiment: (Perform an experiment to test your hypothesis, this is the most important part.) Make an observation: (Observe the outcome of the experiment) Analyze the results and draw a conclusion: (study what the outcome means) Present the findings: (Present what you learned to the scientific community, in this way the science gains knowledge).If you want to learn more, you can read:
https://brainly.com/question/8483218
Answer:
Through the testing of hypotheses.
