Answer:
A
Explanation:
A race-car driver achieved a velocity of 53 m/s in 14 seconds after taking off from rest at the starting line. What was the average acceleration during this time?
The average acceleration of the race - car driver would be 3.78 m/s².
What is average acceleration?Average acceleration is the rate of change of velocity per unit time. Mathematically -
a = dv/dt [instantaneous acceleration]
dv = adt
∫dv = ∫adt
∫dv = a ∫dt
v₂ - v₁ = a(t₂ - t₁)Δv = aΔt
a = Δv/Δt
Given is a race-car driver who achieved a velocity of 53 m/s in 14 seconds after taking off from rest at the starting line.
We can write -
Initial velocity of the race-car driver [u] = 0 m/s
Final velocity of the race-car driver [v] = 53 m/s
Time taken by the race-car driver [Δt] = 14 seconds
Using the formula for acceleration, we get -
a = Δv/Δt = (v - u)/Δt
Substituting the values -
a = (53 - 0)/14
a = 3.78 m/s²
The acceleration will be 3.78 m/s²
Therefore, the average acceleration of the race - car driver would be 3.78 m/s².
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What is the average velocity of a car that goes 120 m in 20 seconds?
Answer:
6 m/s
Explanation:
120m/20s = 6 m/s
The average velocity of a car that goes 120 m in 20 seconds would be 6 meters per second, as the average velocity is calculated by dividing the total distance covered by the moving car by the total time taken by the car.
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. The generally considered unit for velocity is a meter per second. It depends on the magnitude as well as the direction of the moving body.
As the average velocity is determined by dividing the total distance traveled by the driving car by the complete amount of time it takes to travel that displacement, a car traveling 120 meters in 20 seconds would move at an average speed of 6 meters per second.
Thus, the average velocity of the car would be 6 meters/second.
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The nucleus of the atom contains 8 protons and 9 neutrons. The atom is electrically
neutral. How many electrons does this atom have?
The no of the electron must be 8 so that the atom will become electrically neutral. An electrically neutral atom has an equal no of electrons and protons.
What is an atom?The atom consists of matter that may be split without releasing electrical charges.
It's also the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.
In the nucleus proton and the neutron is exists. The condition of the atom to be electrically neutral is that the number of the proton and electron should be the same.
In the given condition the number of protons is 8.
Hence the no of the electron must be 8. So the atom will become electrically neutral.
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A) What is the position of the Earth when the Sun rises to its lowest Midday position in the sky in the Northern Hemisphere? b )What is the position of the Earth when the Sun rises to its lowest Midday position in the sky in the southern Hemisphere?
Answer:
A) In northern hemisphere, position of the earth is towards to the sun.
B) In Southern hemisphere, position is away from the sun.
Explanation:
A) In the month of June in the northern hemisphere, the axis of the earth is usually tilted at an angle of about 23.5°. During this period, it revolves around round the sun with one complete revolution of 365 days. Now for the duration of this rotation, the position of the earth is that it leans into the sun when the Sun rises to its lowest Midday position in the sky .
B) For the southern hemisphere, it undergoes the same rotation as in the northern hemisphere. Just that it is usually in the month of December and the position of the earth is that it leans away from the sun when the Sun rises to its lowest Midday position in the sky .
If the Moon revolves around the Earth in a circular orbit with a period of 27 days, 7 hours, and 43 minutes, and astronomers have clocked it's orbital speed at 1.03 km/s, what is the centripetal acceleration of the Moon due to its orbit around the Earth?
Answer:
T = (27 da * 24 hr/da + 7 hr + 43 min/60 min/hr) * 3600 sec/hr = 2.36 * 10E6 sec period of moon in sec
C = v t = 2 pi R circumference of orbit where v is orbital speed
ac (centripetal acceleration) = v^2 / R = v^2 / (v t / 2 pi) = 2 pi v / t
ac = 2 pi * 1.03 * 10E3 m/s / 2.36 * 10E6 sec = 2.74 * 10E-3 m /s^2
What would be the volume of a liquid that has a density of 1.2 g/mL and a mass of 24 grams
Answer:
The answer is 20 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass = 24 g
density = 1.2 g/mL
We have
[tex]volume = \frac{24}{1.2} \\ [/tex]
We have the final answer as
20 mLHope this helps you
What is the direction and speed of an object?
Answer:
Explanation:
Velocity by definition means speed and direction of an object. This means it has a value and a positive or minus sign indicating direction. Speed is the absolute value of velocity because there is no direction correlated with speed. If you add a direction, it is then called velocity
What is one characteristic of an electron?
O A. Almost no charge
O B. A mass of 1 amu
O C. A charge of +1
O D. Almost no mass
Answer:
the answer to this question is A
Answer:
It is D. Almost no mass
Explanation:
The mass of an electron is 1/2000 times of proton/neutron
On a hot summer day, air temperature is 30 °C and the actual vapor pressure is 30 mb: what is the approximate relative humidity
(RH)?
Answer:
chgfsgfsgsahfsgfggfsgasgsgfgfggdfdsseeerasfasfafvvdavadvdafdfgdb
Explanation:
bbfgfsgssdfeffsdfdffdgsgggfffrterrwrwftgwrtrtqvggsgfgdfhfghh
If you were given a number, say the number “22”, how would you know what it meant? You would have to give it a ___, or people might think you were talking about bowling ball or flowers!
Andy finds a gold colored "rock" in a stream in California. It has a mass of 96.6 grams and a volume of 5.0 cm3. Using the mass and volume, what physical quantity will Andy need to calculate in order to help determine what he has found?
A.
temperature
B.
weight
C.
density
D.
inertia
Answer:
Density
Explanation:
Density is a property that will allow for a possible identification of a material. Different materials have different densities. The unit for density is g/cm^3
In your own words, describe how matter is identified.
Answer:
matter is any substance built of atoms
Explanation:
if anything occupies space and have a mass than that object is identifed as matter.
1. What were the 3 basic concepts of government that the English brought with them to North America?
How did these concepts influence constitutional government in America?
Answer:
1)limited system of government
2)representative system of government
3)individual rights system of government
Explanation:
the 3 basic concepts of government that the English brought with them to North America are listed in the answer
Which is the correct answer ?
Answer:
b is
Explanation:
What is in between the nucleus and the electrons in an atom?
A jello-like goo
B.Protons and Neutrons
C.mushy substance similar to pudding
D
Empty space
Answer:
D. Empty Space
Explanation:
PLEASE HELP IM UNSURE OF WHAT THE ANSWER IS
Answer:
The horizontal forces (Cols 2 & 3) balance for W and Y.
The vertical forces (Cols 1 & 4) also balance for W and Y.
This is not true for either X (unbalanced horizontal forces) or
Z (also unbalnced horizontal forces)
What is a discussion?
Answer:
um, when you talk with other people about stuff. (I'm not trying to sound like a smarta s s I'm just giving a definition...)
Explanation:
what is the formula of taking out distance
Answer:
formula for Distance is Speed ×time
which spectator is likely to get more hurt with tennis / cricket ball
Answer:
It a cricket Ball
Explanation:
which two types of energy does a book have as it falls to the floor?
which best describes what happens with the sonar to sound pulses from a ship after they hit the ocean floor?
Answer:
With sonar, what happens to sound pulses from a ship after they hit the ocean floor? ... They bounce back to the ship.
Explanation:
how to find dimension equation of pressure
Explanation:
pressure=force/area
force=mass x acceleration
area=length x width
force=M x LT^-2
area=L^2
[tex] \frac{mlt { - }^{2} }{l {}^{2} } [/tex]
=ML^-1T^-2
A ball is dropped off a very tall canyon ledge.
How fast is the ball traveling after 5
seconds?
Answer:
V = 49.05 [m/s]
Explanation:
We can easily find the result using kinematics equations, first, we will find the distance traveled during the 5 seconds.
[tex]y =y_{o}+(v_{o}*t)+(\frac{1}{2}*g*t^{2} )[/tex]
where:
Yo = initial position = 0
y = final position [m]
Vo = initial velocity = 0
t = time = 5 [s]
g = gravity aceleration = 9.81 [m/s^2]
The initial speed is zero, as the body drops without imparting an initial speed. Therefore:
y = 0 + (0*5) + (0.5*9.81*5^2)
y = 122.625[m]
Now using the following equation we can find the speed it reaches during the 5 seconds.
[tex]v_{f} ^{2}= v_{i} ^{2}+(2*g*y)\\v_{f}=\sqrt{2*9.81*122.625} \\v_{f}=49.05 [m/s][/tex]
How long will it take to travel 200 km while traveling at a speed of 10 m/s?
Please explain me how to do this and what formula to use, thank you.
Answer: 20,000 seconds
Explanation: there are 1000 miles in a km, so 200km is 200,000 miles
Which element would you expect to be more reactive: phosphorus (P) or fluorine (F)? Explain your answer.
Answer:
Fluorine
Explanation: Fluorine is the most reactive non-metal because it is the most electronegative of all of the non-metal elements of the periodic table.
Mark me Brainliest.
Fluorine would be more reactive.
Fluorine is a member of group 17 in the periodic table. The members of that group are called halogens.
Halogens are known to be highly reactive and for this reason they do not occur free in nature.
Also, fluorine is the most electronegative element (4.0 on Paulings scale). This explains why it is far more reactive than phosphorus (2.19).
Learn more: https://brainly.com/question/2060520
When energy is transformed, some is used, but most is released as unusable heat energy, according to the law of thermodynamics.
Help me out please I need to find this out quick
Answer:
the posible answer is the ball
If an object weighs 370 N on earth, what is its mass?
Answer:
37
Explanation:
because the gravitational acceleration is10N/kg so 370/10=37 answer 37kg
What is the average (mean) of these numbers: 13,43, 12, 3,66
Answer:
27.4
Explanation:
(13+43+12+3+66)/5
137/5
27.4
Answer:
27.4 because you add them all together and divide the number you get by 5
A boulder rolls off a 100 meter cliff with a horizontal velocity of 2 m/s.
Make a sketch of the cliff and the boulder. Be sure to label the height of the cliff, the horizontal velocty of the
boulder, and the trajectory of the boulder
Explanation:
It is given that,
Height of the cliff is 100 m
Its horizontal velocity is 2 m/s
The attached figure shows the sketch of the cliff and the boulder. It will go in the form of parabola. Its trajectory is parabolic in nature. The horizontal distance is called the range of the parabola.
