Answer:
r = 14.13 m
Explanation:
Given that,
Charge 1 = +0.0129 C
Charge 2 = -0.00707 C
The force between charges, F = 4110 N
We need to find the distance between charges. Let the distance be r. The force between two charges is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}\\\\4110=\dfrac{9\times 10^9\times 0.0129\times 0.00707}{r^2}\\\\r=\sqrt{\dfrac{9\times 10^9\times 0.0129\times 0.00707}{4110}} \\\\r=14.13\ m[/tex]
So, the distance between charges is equal to 14.13 m.
Answer:
14.13 m
Explanation:
acellus
Miles Tugo and Ben Travlun are riding in a bus at highway speed on a nice summer day when an unlucky bug splatters onto the windshield. Miles and Ben begin discussing the physics of the situation. Miles suggests that the momentum change of the bug is much greater than that of the bus. After all, argues Miles, there was no noticeable change in the speed of the bus compared to the obvious change in the speed of the bug. Ben disagrees entirely, arguing that that both bug and bus encounter the same force, momentum change, and impulse. Who do you agree with
Answer:
Ben os ok. the moment of the bus and the worm are conserved
Explanation:
System formed by the bus and the worm, therefore the forces during the collision are internal and therefore the moment is conserved
initial instant. Airs of shock
p₀ = My v₀
final instant. After the shock
p_f = (M + m) v
the moment is preserved
p₀ = p_f
M v₀o = (M + m) v
v = [tex]\frac{ M}{ M+m}[/tex] v₀
v = [tex]\frac{1}{1 +\frac{m}{M} }[/tex] v₀
Let's analyze these equations the moment of the bus and the worm are conserved, therefore Ben is the one who is right. Let us propose the solution of the problem.
The person that I agree with based on their stance about the physics of the situation is; Ben Travlun
Conservation of MomentumI will agree with Ben Travlun. The reason is that;
From the question, we see that the bug and the bus experience the same force, the same impulse, and the same momentum change.
Now, the concept of sameness above is not portrayed by Miles' statement because miles claims that the momentum change of the bug is much greater than the bus.
Now, though the bug has less mass and therefore more acceleration, the occupants of the very big bus will not feel the unusually small acceleration.
Finally, the bug is composed of a less strong material and as a result it will be scattered all over the windshield. However, this high level of the bug being scattered and the greater acceleration it possesses does not translate to greater force, impulse, or momentum change.
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Are the number of atoms before and after a chemical reaction the same? Why?
Answer:
They rearrange themselves and join together differently to make new substances called products. The number of atoms of each type is the same before and after a reaction. This means that the total mass of the products is the same as the total mass of the starting substances. In other words, mass is conserved.
The table below includes data for a ball rolling down a hill. Fill in the missing data values in the table and determine the acceleration of the rolling ball. Also find the final Acceleration. Please make sure to fill out the table. Thank you sm!
Please help lol I'm not ver good at these ones
Answer:
Following are the responses to the given question:
Explanation:
Please find the attached table.
[tex]\to t= 10\ /sec\\\\ \to v = 15\ m /sec\\\\ \to a= ?\\\\\to a=\frac{v}{t}\\\\[/tex]
[tex]=\frac{15}{10}\\\\=1.5[/tex]
The process of blood cell formation is known as ?
ita called hematopoiesis
PLS i really need help.
•you decided to play Flick the coin with your friend. The goal of the game is to flick the coin from the top of a table and let it land of the floor as far as possible. The coin that you flicked left the table (0.8m high) with an initial velocity of 5m/s. Compute the following.
A. Time It will take for the coin to reach the ground.
B. Range (how far from the base of the table will the coin land.with solution
Answer:
A) The time taken by the coin to reach the ground will be 0.4 seconds
B) Range of the motion of the coin will be 2m
Explanation:
This is a case of horizontal projectile motion as there's no initial vertical velocity given to the coin and has only horizontal velocity initially.
According to the equations of Horizontal projectile
[tex]Sy=\frac{1}{2} *g*t^2[/tex] {[tex]Sy =[/tex] Vertical distance traveled , [tex]g=[/tex] acceleration due to gravity of Earth , [tex]t=[/tex] time of flight i.e time taken)[tex]Sx= Vx*t[/tex] ([tex]Sx=[/tex] Range of the projectile ,[tex]Vx=[/tex] initial horizontal velocity, [tex]t=[/tex] time of flight)Given :
Vertical distance to be traveled ([tex]Sy[/tex])= 0.8m
Initial horizontal velocity ([tex]Vx[/tex])= 5m/s
For calculations, we will take acceleration due to gravity ([tex]g[/tex]) to be [tex]10 m/s^2[/tex]
A) Putting values in equation [tex]Sy=\frac{1}{2} *g*t^2[/tex]
⇒ [tex]0.8=\frac{1}{2} *10*t^2[/tex]
⇒[tex]\frac{1.6}{10} =t^2[/tex]
⇒ [tex]\sqrt{0.16} =t[/tex]
⇒ [tex]0.4=t[/tex]
Therefore, time taken by the coin to reach the ground is 0.4 seconds
B) Now using t= 0.4s putting values in equation [tex]Sx= Vx*t[/tex]
⇒[tex]Sx=5*0.4[/tex]
⇒[tex]Sx=2[/tex]
Hence , Range of the coin is 2m
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The more dense the liquid, the higher the __________ at a particular depth.
Answer:
The higher the pressure
Two point sources are simultaneously creating waves with a wavelength of 6 cm. Point X lies between the two sources. It is 9 cm from one source and 15 cm from the other. What wave heights do you expect at point X? A. The waves will never get very high or low. B. The waves may get very high, but will never get very low. C. The waves may get very low, but will never get very high. D. The waves will sometimes get very high and very low.
Answer:
OPTION D (The waves will sometimes get very high and very low) is the answer.
Explanation:
Wavelength = velocity ÷ frequency
As the frequency which measures the number of waves per unit of time is inversely proportional to the wavelength, point X which lies between two sources, and one source is shorter than another, the wave heights at point x will vary as the distances from point X vary too. This means that waves at point X depending on the wave type and source will get very high at times and very low.
If the air is only holding one-third as much moisture as it can possibly hold
Answer:
humoidity
Explanation:
17. Which element has 57 neutrons?
Answer:
where are the answers
Explanation:
If you begin with 40 grams of a radioactive isotope and end with 10 grams, how many half-lifes of the radioactive isotope have passed ?
1. What was Swimmer C's average speed?
2. What was Swimmer A's average speed during the period 10 min to 20 min?
Answer:
4.8 km/hr ;
0
Explanation:
Based on information plotted on the graph :
Distance traveled by swimmer C = 2400 m
Travel time of swimmer C = 30 minutes
Converting distance to km:
2400 m = 2400 / 1000 = 2.4 km
Converting time to hour :
30 minutes = 30 / 60 = 0.5 hour
Average speed = Distance traveled / time taken
Average speed = 2.4 km / 0.5 hour = 4.8 km/hr
2.)
Swimmer A's average speed during the period 10 to 20 minutes ;
Change in distance /change in time
(400 - 400) / (20 - 10) = 0
Hence, distance traveled is 0
a water bomber flying with a horizontal speed of 85m/s at a height of 3000m drops a load on a fire below. How far in front of the target fire should the load be released?
Answer:
2081.65 m
Explanation:
We'll begin by calculating the time taken for the load to get to the target. This can be obtained as follow:
Height (h) = 3000 m
Acceleration due to gravity (g) = 10 m/s²
Time (t) =?
h = ½gt²
3000 = ½ × 10 × t²
3000 = 5 × t²
Divide both side by 5
t² = 3000 / 5
t² = 600
Take the square root of both side
t = √600
t = 24.49 s
Finally, we shall determine the distance from the target at which the load should be released. This can be obtained as follow:
Horizontal velocity (u) = 85 m/s
Time (t) = 24.49 s
Horizontal distance (s) =?
s = ut
s = 85 × 24.49
s = 2081.65 m
Thus, the load should be released from 2081.65 m.
What are 3 procedures of having(making) spinners? Help!
Answer:
The bearings are generally ceramic, metal (stainless steel or chrome), and some are hybrids—such as ceramic balls with stainless races and cages.
Explanation:
good luck
- 3000 J of work is done on a 2kg object over a distance of 10m. What is the force acting on the object?
A.1500N
B.300N
C.3000N
D.600ON
the distance and direction between starting and ending positions
Answer:
The length traveled by an object moving in any direction or even changing direction is called distance. The location of an object in a frame of reference is called position. For straight line motion, positions can be shown using a number line. The separation between original and final position is called displacement
Explanation:
good luck
[tex]\huge\mathfrak\red{Question}[\tex]
When two magnets repel, they
A. break
B. pull together
C. push apart
D. change color
Answer:
option C : they push apart
Explanation:
If you hold two magnets the wrong way around, they push apart - they repel! In other words, if you hold two magnets together so that like-poles are close together (two norths OR two souths), they repel
Answer:
the magnet push apart
Explanation:
that is the two magnet are facing each other with the same pole...
that is to say like pole push apart and unlike pole attract
A 30.0 kg rock falls from a 35.0 m cliff. What is the kinetic and potential energy when the rock has fallen 12.0 m?
Answer:
When the rock has fallen 12.0 m;
The kinetic energy of the rock is approximately 3,531.6 J
The potential energy of the rock is approximately 6,768.9 J
Explanation:
The question relates to the characteristic constant total mechanical energy of a body
The mass of the rock that falls, m = 30.0 kg
The height of the cliff from which the rock falls, h₁ = 35.0 m
The required information = The kinetic and potential energy when the rock has falling 12.0 m
The kinetic energy is given by the formula, K.E. = 1/2×m×v²
The potential energy is given by the formula, P.E. = m·g·h
Where;
g = The acceleration due to gravity ≈ 9.81 m/s²
The velocity of the rock after falling through a given height, h is given by the formula, v² = 2·g·Δh
The total mechanical energy of the rock, M.E. = K.E. + P.E. = Constant
At the height of the cliff before falling, Δh =0, therefore v₁ = 0, therefore, K.E. = 1/2×m×v₁² = 0 J
The potential energy at the cliff before the rock begins to fall, P.E. is goven as follows;
P.E. = 30.0 kg × 35.0 m × 9.81 m/s² = 10,300.5 J
At the top of the cliff, M.E. = K.E. + P.E. = 0 J+ 10,300.5 J = 10,300.5 J
∴ M.E. = 10,300.5 J
When the rock has fallen, 12.0 m, Δh = 12.0 m, the speed of the rock, v₂, is given as follows;
v₂² = 2 × 9.81 m/s² × 12.0 m = 235.44 m²/s²
v₂ = √(235.44 m²/s²) ≈ 15.344 m/s
∴ When the rock has fallen 12.0 m, K.E., is given as follows;
K.E. = 1/2×m×v₂²
K.E. = 1/2 × 30.0 kg × 235.44 m²/s² = 3,531.6 J
When the rock has fallen 12.0 m the kinetic energy, K.E. = 3,531.6 J
When the rock has fallen 12.0 m, M.E. = P.E. + K.E.
M.E. = Constant = 10,300.5 J
K.E. = 3,531.6 J
∴ 10,300.5 J = P.E. + 3,531.6 J
P.E. = 10,300.5 J - 3,531.6 J = 6,768.9 J
∴ When the rock has fallen 12.0 m, the potential energy, P.E. = 6,768.9 J.
How can we create a new element by combining all the other elements
Answer:
In order to create a new element you have to change the number of protons in a nucleus.
HELP ME ASAP PLZZZ NOW!!!
Answer:
B. It's nucleus releases energy
Explanation:
Please I need help in this now
Answer:
a
Explanation:
worng worng
why don't you have to make your heart beat?
Answer:
Some muscles in the body are “involuntary”, which means you can't control them. The heart is made of a special involuntary muscle called cardiac muscle, and this muscle is made up of cells called cardiomyocytes (which literally means “heart muscle cells” in Latin)
A wheel initially rotating at 12 rad/s decelerates uniformly to rest in 0.4 s. If the wheel has a rotational inertia of 0.5 kg.m², what is the magnitude of the torque causing this deceleration? (A) 1.5 N.m (B) 15 N.m (C) 30 Nm (D) 38 Nm
Answer:
(B) 15 N.m
Explanation:
The deceleration of the wheel is first found by using the following formula:
[tex]\alpha = \frac{\omega_f - \omega_i}{t}[/tex]
where,
α = angular acceleration = ?
ωf = final angular speed = 0 rad/s
ωi = initial angular speed = 12 rad/s
t = time = 0.4 s
Therefore,
[tex]\alpha = \frac{0\ rad/s - 12\ rad/s}{0.4\ s}\\\\\alpha = -30\ rad/s^2[/tex]
here, the negative sign shows deceleration.
Now, we find the torque responsible for this deceleration:
[tex]\tau = I\alpha[/tex]
where,
τ = torque = ?
I = rotational inertia = 0.5 kg.m²
Therefore,
[tex]\tau = (0.5\ kg.m^2)(30\ rad/s^2)\\[/tex]
τ = 15 N.m
Therefore, the correct answer is:
(B) 15 N.m
A wheelbarrow is pushed with a force of 40 N. If 6,000 J of work is
done, what is the total distance the wheelbarrow was pushed?
Answer:
Distance = 150 meters
Explanation:
Given the following data;
Work done = 6,000 Joules
Force = 40 Newton
To find the total distance covered by the wheelbarrow;
Workdone = force * distance
Substituting into the formula, we have;
6000 = 40 * distance
Distance = 6000/40
Distance = 150 meters
Therefore, the total distance the wheelbarrow was pushed is 150 meters.
1. Explain how applied heat works between and at critical temperatures.
2. Explain how a refrigerator works to cool down warm objects that would otherwise be i
temperature.
3. Fill in the chart below to identify the name of the process that explains the state of cha
indicated, the states of matter being changed, or the points at which the process occu
Answer:
More heat is required for the change of state.
Explanation:
Applied heat works at critical temperatures because at this point more heat is needed by the substance in order to change the state of substance. At critical temperatures, the substance can't melt if no more heat energy is given to the substance. A refrigerator works to cool down warm objects by absorbing heat from the inside portion of the fridge and provides cool air which cools the inner side of the fridge. The point at which a solid changes into a liquid state is called melting point while on the other hand, the point at which a liquid changes into a gaseous state is known as boiling point of a substance.
Which region of a longitudinal wave is this?
A. Rarefaction
B. Diffusion
C. Compression
D. Diffraction
The region of a longitudinal wave that is represented by an arrow is known as rarefaction. Thus, the correct option for this question is A.
What is a Longitudinal wave?A longitudinal wave may be defined as a type of wave where the displacement of the medium is in the same direction as the direction of the traveling wave. The distance between the centers of two consecutive regions of compression or the rarefaction is defined by wavelength, λ.
Longitudinal waves express areas of compression and rarefaction: compressions are regions of high pressure due to particles being close together. Rarefactions are regions of low pressure due to particles being spread further apart.
Therefore, the region of a longitudinal wave that is represented by an arrow is known as rarefaction. Thus, the correct option for this question is A.
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If the ___ of a material are lined up, the object will be magnetic.
Answer please
will mark brainliest if right
Answer:
Atoms
Explanation:
A string 1.30 meters in length is oscillating in its first harmonic. The frequency of
oscillation is 7.80 Hz. What is the wavelength of the first harmonic?
Answer:
2.6m
Explanation:
The formula for calculating the wavelength is expressed as;
λ = v/f
v is the velocity
f is the frequency of vibration
Given
f = 7.80Hz
We need to get the velocity
For string;
f = V/2L
7.80 = V/2(1.3)
7.80 = V/2.6
V = 2.6 * 7.8
V = 20.28m/s
Get the required wavelength
λ = v/f
λ = 20.28/7.80
λ = 2.6m
Hence the wavelength of the first harmonic is 2.6m
The increase in resistant strains of insects to chemicals is a result of:
A. natural selection creating new organisms
B. evolution of new species
C. increase in those offspring who inherited resistant traits from their parents
D. all of the above
Answer:
answer D. all of the above
Which of the following is true of alternating current? Select all that apply.
- The net position of the electrons remains the same.
- Electrons always flow in one direction.
- Electrons reverse direction periodically.
- It waveform is the sine wave.
Answer:
The correct option is (C).
Explanation:
Electric current can be direct or alternating.
The direct current flows only in one direction. It is unidirectional.
The alternating current or an C current reverse its direction periodically.
So, the correct statement regarding the alternating current is (c) i.e. Electrons reverse direction periodically.
Una mujer de masa m está parada en el borde de una mesa giratoria horizontal de momento de inercia I y radio R. La mesa al principio está en reposo y tiene libertad de moverse alrededor de un eje vertical sin fricción que pasa por su centro. La mujer empieza a caminar alrededor de la orilla en direción de las manecillas del reloj (vista desde arriba) a una velocidad constante v en relación a la Tierra.
a) En qué dirección y con qué velocidad angular gira la mesa?
b) Cuál es el trabajo efectuado por la mujer para poner en movimiento la mesa?
r
[tex]- \frac{mR^2 }{I } \ v[/tex]Answer:
a) w = - [tex]\frac{m r }{I} v[/tex] , b) W = - ½ m_woman R² (1 + m_woman R / I²) v²
Explanation:
a) To solve this exercise, let's use the conservation of angular momentum.
We define a system formed by the table and the woman, therefore the torques are internal and the moment is conserved
initial instant. Before starting to move the woman
L₀ = 0
final instant. After starting to move
L_f = I w + m v r
the moment is preserved
L₀ = L_f
0 = Iw + m v r
w = - [tex]\frac{m r }{I} v[/tex] (1)
the direction of the angular velocity is opposite to the direction of the linear velocity, that is, counterclockwise
b) for this part we use the relationship between work and kinetic energy
W = ΔK
in this case the initial speed is zero and the final speed of the table, using the relationship between linear and angular variables
v = w r
we substitute
W = 0 - ½ I_total w²
I_total = I + m_{woman} R²
W = - ½ (I + m_woman R²) ( [tex]\frac{m_{woman} R}{I} \ v[/tex]) ²
W = - ½ (m_woman² R² + m_woman³ R³ / I²) v²
W = - ½ m_woman R² (1 + m_woman R / I²) v²