Answer:
The answer is 2 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
where
f is the force
m is the mass
From the question
f = 140 N
m = 70 kg
We have
[tex]a = \frac{140}{70} = \frac{14}{7} \\ [/tex]
We have the final answer as
2 m/s²Hope this helps you
Suppose that John lives on a square block that is 180 yards per side,
and in the evenings, he walks with his dog around the block for a little
exercise.
a. If John walks once around the block, what distance does he
travel?
b. If John walks once around the block, what is his final
displacement?
Answer:
a. 720 yards
b. 254.56 yards
Explanation:
Given that the square block is 180 yards per side.
a. The distance traveled by John = The perimeter of the square block
The perimeter of the square block = 4 x Length of one of its sides
So that,
The distance traveled by John = 4L
= 4 x 180
= 720 yards
Thus, John travels a distance of 720 yards.
b. John's final displacement = [tex]\sqrt{x^{2} +y^{2} }[/tex]
where x ad y are the length of any two sides of the square block.
John's final displacement = [tex]\sqrt{180^{2} + 180^{2} }[/tex]
= [tex]\sqrt{64800}[/tex]
= 254.5584
John's final displacement is 254.56 yards.
What is the charge of an element that has 5 protons and 7 electrons?
Answer:
atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons. When you are missing an electron or two, you have a positive charge. When you have an extra electron or two, you have a negative charge.
Explanation:
When the amount of electrons in an atom is the same as the atomic number, the atom has a neutral charge. Particles with extra protons or missing electrons are known as ions.
Where is the electron?Electrons are present outside the electron shell, in contrast to nucleons, which are contained inside the core at its center. Neg electrons are drawn to a positive nucleus so because excitons of opposite polarity attract one another. The total energy of an electron is inversely proportional to the intensity at which the electrons wave equation vibrates. Elevated atomic states have faster-vibrating electrons. An electron should always be oscillating at some speed because it is a subatomic object with wave-like characteristics.
Why are electrons so important?Electrons are fundamental to many physical processes, including gravity, magnetic interactions, weak interrelations, electricity, magnetism, chemistry, and thermal conductivity. Ions and electrons are drawn into positive charges atoms by their nucleus's attraction pull. Unless an electrons received sufficient power to overcome this pressure by ascending, it was impossible for an electrons to escape from in an atom in mathematical mechanics.
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Please help need the answer asap
34=x2 - 4(7 + 82)
Answer:
x² - 4 ( 7 + 82 ) = 34
x² - 28 - 328 = 34
x² = 34 + 28 + 328
x² = 390
x = √390
Explanation:
Joyce and Efua are skating. Joyce pushes Efua, whose mass is 40.0 kg, with a force of 5.00 N. What is Efua’s resulting acceleration?
Answer:
[tex]a=0.125\ m/s^2[/tex]
Explanation:
Given that,
Mass, m = 40 kg
The net force with which Joyce pushes Efua is 5 N.
We need to find Efua’s resulting acceleration. Let it is equal to a. Net force is given by :
F = ma
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{5\ N}{40\ kg}\\\\a=0.125\ m/s^2[/tex]
So, the acceleration is [tex]0.125\ m/s^2[/tex].
The resulting acceleration of Efua is [tex]0.125 \;\rm m/s^{2}[/tex].
Given data:
The mass of Efua is, m = 40.0 kg.
The magnitude of applied force by Joyce is, F = 5.00 N.
The given problem is based on the Newton's Second law of motion. As per the Newton's second law, the applied force is equal to the product of mass and the acceleration of object. Therefore,
F = ma
a = F/m
Solving as,
a = 5.00 / 40
[tex]a = 0.125 \;\rm m/s^{2}[/tex]
Thus, we can conclude that the resulting acceleration of Efua is [tex]0.125 \;\rm m/s^{2}[/tex].
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Starting from rest, a car takes 2.4s to travel 15m. Assuming a constant acceleration, how long will it take the car to travel the next 15m?
Answer:
T = 2.4 + 2.4 = 4.8 [s]
Explanation:
In order to solve this problem, we must use the following kinematics equation and calculate the acceleration value.
[tex]x=x_{o} +v_{o}*t+(\frac{1}{2})*a*t^{2}[/tex]
Vo = inital velocity = 0
x - xo = 15 [m]
t = time = 2.4 [s]
15 = 0.5*a*(2.4)^2
a = 5.208 [m/s^2]
We can use the same equation to find the time.
30 = 15 + 0.5*(5.208)*t^2
t = 2.4 [s]
T = 2.4 + 2.4 = 4.8 [s]
A student throws a ball and a piece of clay at a wall. The ball and the clay have identical masses m and are thrown with the same speed v. The ball bounces elastically off the wall and back to the student. The clay sticks to the wall. How does the impulse the wall imparts on the ball compare to the impulse the wall imparts on the clay?
(A) One fourth as much
(B) Half as much
(C) They are the same
(D) Twice as much
(E) Four times as much
Answer:
option c they are the same
Explanation:
The wall will receive equal momentum from both the balls because both balls have equal mass and velocity
If a star were located exactly at each celestial pole, the corrected altitude of the star would equal __________.
Answer:
the observer's latitude
Explanation:
the observer's latitude
Complete the sentence using word balanced, normal or tension.
Equal and opposite forces that act on the same object are called____
forces?
The more __________ energy being used, the ___________ the roller coaster will go. Question
A:Kinetic, slower
B:Potential, faster
C:Kinetic, faster
D:Potential, slower
Answer: b
Explanation:
Answer:
C.
The More Kinetic Energy being used, the Faster, the Roller Coaster will go.
Explanation:
Hope i helped you :)
Does guardians of the galaxy have multiple endings.
Answer: no I watch both of them
Explanation:
Which of the following statements is true?
A. Musical Instruments are grouped by the wavelengths they produce.
B. Musical Instruments are grouped by what they are made of.
C. Musical Instruments are grouped by their frequency.
D. Musical Instruments are grouped by how they produce pitch.
Answer:
Musical instruments are grouped by how they produce the pitch.
Pitch is the highness or lowness of a tone.
Explanation:
:)
A train on a straight track goes in the positive direction for 5.9km and then back up for3.8km. What is the train's displacement, what is the total distance covered by the train?
Answer:
Trains displacement = 2.1 KM
Total distance covered by the train = 9.7 KM
Explanation:
Total distance covered by train will be the total distance moved train
hence
total distance covered by the train = distance covered by train in positive direction + distance covered by train in moving back
total distance covered by the train = 5.9 KM + 3.8 KM = 9.7 KM
_____________________________________
Displacement is the shortest distance from original position to the final position during the course of movement of any object.
Given that
Train moved 5.9 KM in positive direction(let it be AB as shown)
hence displace until now is 5.9 KM
but it again moved back for 3.8 KM(let it be B to C as shown below)
it means , train moved 3.8 KM towards origin position
so net displacement will be = 5.9 KM - 3.8 KM = 2.1 KM
A............................................................B ----> 5.9 KM
A_________C___________________B
3.8 KM
Thus, AC will be displacement = AB - BC = 5.9 KM - 3.8 KM = 2.1 KM
Thus,
Trains displacement = 2.1 KM
Total distance covered by the train = 9.7 KM
The name dinitrogen tetroxide tells you that this compound contains
*
a. two nitrogen atoms and two oxygen atoms.
b. four nitrogen atoms and two oxygen atoms.
c. two nitrogen atoms and four oxygen atoms.
d. four nitrogen atoms and four oxygen atoms.
Answer:
C. two nitrogen atoms and four oxygen atoms
Explanation:
The name dinitrogen tetroxide tells you that this compound contains two nitrogen atoms and two oxygen atoms. The correct answer is a) .
The name "dinitrogen tetroxide" provides information about the composition of the compound. "Dinitrogen" indicates that there are two nitrogen atoms (di- meaning two), and "tetroxide" indicates that there are two oxygen atoms (tetra meaning four in this context).
Therefore, the compound contains two nitrogen atoms and two oxygen atoms. The correct answer is a).
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Lemonade is best described as _______.
A. an element
B. a compound
C. a pure substance
D. a mixture
Lemonade is best described as __________.
D. a mixture
Predict the speed of a car after 10.0 s when the car’s speed follows
the relationship speed = (4.8 m/s2 ) × (time).
Answer:
48 m/s
Explanation:
The time is 10 seconds
The speed of the car after 10 seconds when the relationship is 4.8 m/s^2 × time can be calculated as follows
= 4.8 × 10
= 48
Hence the speed is 48 m/s
What is the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center?.
The magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center is
¹/₂MR³a.
Net torque on the wheel
The net torque on the wheel is determined from the moment of inertia of the pulley and the angular acceleration of the pulley.
∑τ = Iα
where;
I is moment of inertia of pulleyα is angular acceleration of the pulleyLet the pulley be a solid uniform disk, the moment of inertia of the axis perpendicular to the wheel and passing through its center is calculated as;
I = ¹/₂MR²
τ = ¹/₂MR²α
τ = ¹/₂MR²(aR)
τ = ¹/₂MR³a
where;
a is the acceleration of the pulley due to the applied force.Thus, the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center is ¹/₂MR³a.
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When watching the interstellar movie:
Copper and Dr.Brand we’re on Millers planet for approximately _____ years.
This means that the total time Dr. Mann weren’t without human contact is: ____ years.
How are common traits used to define a species?
Answer:
A species is often defined as a group of individuals that actually or potentially interbreed in nature. ... The definition of a species as a group of interbreeding individuals cannot be easily applied to organisms that reproduce only or mainly asexually. Also, many plants, and some animals, form hybrids in nature.
Explanation:
Answer:
A species is often defined as a group of individuals that actually or potentially interbreed in nature. ... The definition of a species as a group of interbreeding individuals cannot be easily applied to organisms that reproduce only or mainly asexually. Also, many plants, and some animals, form hybrids in nature.
Explanation:
hope it helps
A light-year (ly) is a unit of distance defined as thedistance light travels in
one year. Numerically, 1 ly =9 900 000 000 000 km. How many meters are
in alight-year?
Answer:
9 900 000 000 000 km = 9 900 000 000 000 000 m
Explanation:
9 900 000 000 000 * 1000
Imagine that someone is sitting down to enjoy a cup of coffee or hot chocolate. Use your experiences to describe how heat flows from the drink to its surroundings. Be as detailed as possible.
Answer:
The heat flows into my body and I start with a warming feeling going down my throat as it starts there I get this warm feeling and I break out in a coldsweat from consuming a warm drink a cold drink will help cool me down
Explanation:
If drink something warm, you will be warm. If you drink something cool, you will cool down.
Which of these examples best shows a change from potential to kinetic energy?
Answer:
Water flowing over a tall cliff
Explanation:
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QUICK
Answer:
A
Explanation:
The motion of the wheelbarrow is going straight, so the wheelbarrow accelerates faster. Since it doesn't say about moving the motion onto its side, it's A.
If this wave has frequency of 15 hz. what is the wavelength of that wave ?
If this wave has a frequency of 15 Hz then the wavelength of the wave would be 2 ×10⁷ m
What is Wavelength?It can be explained in terms of the separation between any two similar successive points on a wave, such as how the wavelength can be determined by calculating the separation between any two successive crests.
According to the following relation, the wavelength and wave frequency are inversely proportional.
C = νλ
Where c is the speed of light and v is the wave's frequency and λ
is the wave's wavelength.
As given in the problem If this wave has a frequency of 15 hz.
As we know C = νλ
by substituting the value of the frequency in the given formula
C = 3×10⁸ m/s
3×10⁸ = 15 ×λ
λ = 3×10⁸/ 15
= 2 ×10⁷ m
Thus, If this wave has a frequency of 15 Hz then the wavelength of the wave would be 2 ×10⁷ m
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What is the Quantum Theory?
Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level. The nature and behavior of matter and energy at that level is sometimes referred to as quantum physics and quantum mechanics.
I LOVE THE Quantum Theory
Hope this helps!
Please help meeeeeeeeeeeeeeeee
Explanation:
transverse wave is a type of wave that moves at right angles with the direction of the wave while a compressional/longitudinal wave is a wave that move parallel with the direction of the wave travel
The male african elephant at the city zoo has a mass of 5450kg.what is its mass in scientific notation?
Answer:
5.45 x 10^3
Explanation:
Answer:
the top guy was right
Explanation:
Its right
which two forms of energy travel in waves
Answer: Electromagnetism and sound
A car speeds up from rest to 40 m/s in 5 s. Find the car speed at 2 s and overall
distance traveled.
Answer:
I would have to say that i feel that after 2 seconds it would be 8 m/s and the overall distance would be 200 m but don't quote me on it
Explanation:
discuss the role of global ization in the development of SI unit
Answer:
Sharing of information
Explanation:
The development of SI unit has helped in the sharing of scientific as well as techical information internationally.
HOPE THIS HELPED
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