3.75 N
Explanation:
F = k(q)(q)/r^2 = 5 N
F' = k(q)(3q)/(2r)^2
= k×3(q)(q)/4r^2
= (3/4)[k(q)(q)/r^2]
= (3/4)F
= (3/4)(5 N)
= 3.75 N
The new electric force is 3.75 N.
The force on the charges by Coulomb's law is given by;
F = kq1q2/r^2
where q1=q2
F = kq1^2/r^2
Where F = 5N
If one of the charges triples;
q2 = 3q1
distance doubles = r = 2r
F' = 3kq1^2/4r^2
So;
F' = 3/4 F
F' = 3/4 × 5 = 3.75 N
The new electric force is 3.75 N.
Learn more about electric force: https://brainly.com/question/1195122
4.) What determines a star brightness? *
a. Size
b. Temperature
c. Size & Temperature
d. Color & Temperature
what is the correct name for a bond between two phosphorus adtoms and three oxygen atoms
Covalent
Explanation:
Covalent Bond
Answer:
diphosphorus trioxide
Explanation:
A grocery shopper tosses a(n) 8.6 kg bag of rice into a stationary 18.1 kg grocery cart. The bag hits the cart with a horizontal speed of 5.2 m/s toward the front of the cart. What is the final speed of the cart and bag
Answer: 1.67 m/s
Explanation:
Given
Mass of bag is [tex]m=8.6\ kg[/tex]
Mass of cart is [tex]M=18.1\ kg[/tex]
bag hits the cart with horizontal speed of [tex]u=5.2\ m/s[/tex]
Suppose the system move with speed v after collision
Conserving the momentum
[tex]\Rightarrow mu+M(0)=(M+m)v\\\\\Rightarrow v=\dfrac{mu}{M+m}\\\\\Rightarrow v=\dfrac{8.6\times 5.2}{18.1+8.6}\\\\\Rightarrow v=1.67\ m/s[/tex]
A 400 N force gives an object an an acceleration of 4 m/s. The mass of the object is what?
Answer:
100 kg
Explanation:
F = 400 N
a = 4 m/s
F = ma
400 = m(4)
m = 100 kg
Answer:
Explanation:
use formula,
Force=mass*acceleration
400 N=mass*4m/s
400 N/4 m/s=mass
100 kg =mass
Q1.
Sue pumps up a bicycle tyre. As she does so, she notices that the pump becomes hot.
(a) Where, and how, was the energy stored before it was transferred in pumping up the tyre?
Answer:
The energy was stored as chemical energy in Sue' muscle before it was transformed into mechanical energy that moves the pump handle to ump the tyre
Explanation:
In pumping up the tyre, the valve of manual pump is attached airtight to the tyre tube
As the handle of the pump is pulled up or out, air rushes into the pump from the atmosphere through the inlet valve
As the handle pushed in, the inlet valve closes and the air is forced into the tyre tube by difference in pressure and as the tube is filled, more pressure is required to enable the tube expand and build pressure inside to maintain a circular cross section while carrying load
According to Gay Lussac's Law, temperature of the air in the pump increases as its pressure increases
Given that Sue provides the energy for pumping the tyre, the energy was stored as chemical energy in Sue's muscles which is then used in moving the pump handle in the up and down motion required to pump the tyre
Which of the following are states of matter?
A. Liquid
B. Solid
C. Mixture
D. Gas
E. Compound
Answer:
There are four natural states of matter: Solids , liquids, gases and plasma. The fifth state is the man-made Bose-Einstein condensates. In a solid, particles are packed tightly together, so they don't move much.
Explanation:
1. PART A: Which statement describes the central idea of
the text?
Baseball from pitch to hits
The correct answer to this open question is the following.
Unfortunately, you did not attach the article or the text. You also forgot to attach the options for the question.
However, trying to help you we did some deep research and can comment on the following.
The statement that describes the central idea of the text is "Baseball can be explained and improved by collecting data and studying the natural laws at play in the sport."
You are referring to the article written by Stephen Ornes, of August 21, 2013, for Science News for Students.
The author refers to the idea that baseball and physics are related and can be understood through the "eyes" of science. Statistics bring interesting data to help understand the game.
And this idea is correct because today, baseball coaches and other sports coaches as is the case of football, use a series of statistics and data to better hire talent for their respective teams, as well as to better create plans and game strategies derived from the results and interpretation of data.
Which of the following best describes what is “relative” in the theories of relativity?
a. Measurements of time and motion change relative to their frame of reference.
b. Everything is relative.
c. The speed of light is relative.
d. Antimatter twins are relatives.
Answer:
Explanation:
B
Around the turn of the twentieth century, inventor Robert Shuman was engineering products that used energy directly from the Sun to power motors and farms. He stated that coal and oil would eventually run out and that humans needed to learn how to use the more-abundant energy resource of the Sun. During which stage of technological design did Shuman identify that using oil and coal would be a problem? first second third fourth
Answer: First stage
Explanation:
The four stages of technological design include:
• identifying a problem.
• Designing a solution.
• Implement, build, and test the design.
• Determine if solution met the need.
In this scenario, Robert Shuman identified the problem. This was depicted as he stated that coal and oil would eventually run out and that humans needed to learn how to use the more-abundant energy resource of the Sun,
A machine lifts a 35 kg object doing 6860 J worth of work. How much power is produced by the machine if it lifts the object in 4 seconds?
350 W
60025 W
27440 W
1715 W
Answer:
Explanation:
We need the power equation for this which is
P = Work/time
We have everything we need to solve this (the mass of the object is extra information):
P = 6860/4
P = 1715W
8. What kind of information do black hole detectors not provide?
A. precise timing
B. specific positional information
C. photon intensity
D. power of a black hole
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow- dryer is 11 Amps, and that of the vacuum cleaner is 4.0 Amps. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner, (c) Determine the ratio of the energy used by the blow-dryer in 15 minutes to the energy used by the vacuum cleaner in one-half hour.
Answer:
(a) 1320 W
(b) 480 W
(c) E':E ≈ 11:2
Explanation:
(a) Applying,
P' = VI'................. Equation 1
Where P' = Power of the blow-dryer, V = Voltage, I = current rating of the blow-dryer.
From the question,
Given: V = 120 V, I' = 11 A
Substitute these values into equation 1
P = (120×11)
P = 1320 W
(b) Similarly,
P = VI................... Equation 2
Where P = Power of the vacuum cleaner. I = current rating of the vacuum cleaner.
Also Given: I = 4 A,
Therefore
P = 4(120)
P = 480 W
(c)
E' = P'/t'............. Equation 3
E = P/t................ Equation 4
Where E' = Energy of the blow-dryer, t' = time of use of the blow-dryer, E = Energy of the vacuum cleaner, t = time of use of the vacuum cleaner
From the question,
Given: t' = 15 minutes = (15×60) = 900 seconds, t = 30 minutes = (30×60) = 1800 seconds
Substitute these values into equation 3 and 4
E' = 1320/900
E' = 1.47 J,
E = 480/1800
E = 0.267
Therefore,
E':E = 1.47:0.267
E':E ≈ 11:2
An attractive force of |1N| exists between two charged particles. The magnitude of both charges is the same. If the particles are 0.25m apart what is the value and sign of the charge for both particles.
A. (- 2.6x10-6 C) and (+ 2.6x10-6 C)
B. (+ 2.7x10-11 C) and (- 2.7x10-11 C)
C. (- 5.27x10-6 C) and (+ 5.27x10-6 C)
D. (- 6.94x10-12 C) and (- 6.94x10-12 C)
Answer:
A: -2.6 × 10^(-6) C and 2.6 × 10^(-6) C
Explanation:
According to coulombs law, the formula for the force between 2 charged particles is;
F = kq1•q2/r²
Where;
F is Force = |1N|
q1 and q2 are the charges of both particles
k is coulombs constant = 9 × 10^(9) N.m²/C²
r is distance between particles = 0.25
Now, the force |1N| means -1 or +1
Thus;
-1 = 9 × 10^(9) × q1•q2/(0.25)²
Or
1 = 9 × 10^(9) × q1•q2/(0.25)²
Thus;
q1•q2 = -6.94 × 10^(-12)
Or q1•q2 = 6.94 × 10^(-12)
Now, we are told that the magnitude of both charges are the same.
Thus;
q² = 6.94 × 10^(-12)
q = √(6.94 × 10^(-12))
q = 2.6 × 10^(-6) C
Since from earlier, we saw that;
q1•q2 = -6.94 × 10^(-12)
Or q1•q2 = 6.94 × 10^(-12)
Thus means that one of the charges will be negative while the other will be positive.
Thus, the charges are;
-2.6 × 10^(-6) C and 2.6 × 10^(-6) C
URGENT A person was standing on top of an office building and ‘accidentally' dropped a rock off the roof . How tall is the building if the total velocity is 123m/s and the horizontal velocity is 22m/s?
Answer:
Building is 747.19 m tall
Explanation:
Given, t
Total velocity v = 123 m/s
Horizontal velocity or the X -component if velocity vx = 22 m/s
For a horizontal projectile motion
V = Sqrt (vx^2 + g^2t^2)
Or t = sqrt{(v^2 – vx^2)/g^2} ---Eq (1)
Time of flight
t = sqrt (2h/g) – Eq (2)
where h is the height
Equating, both the equation, we get –
h = (123^2 – 22^2)/19.6 = 747.19 m
for every 100 joules or useful energy output, the heater wastes 100 joules, find the input energy of the heater.
You’ve probably seen how the surface of a tire can partially melt and leave a mark on the road when a car’s brakes are applied really hard. Explain why the surface of the tire melts.
Answer:
The friction of braking heats up the tire and the road. The temperature is so high that it reaches the melting point of the rubber in the tire. The melting rubber is what leaves a mark on the road.
Explanation:
Answer:
the friction of braking heats up the tires and the road. then the temperature gets even hotter to the point where it melts the rubber.
Explanation:
this is my answer so be careful how you copy it, but you've got this guys schools is almost out stay strong an have fun and be safe this summer keep pushing <33.
remember you're loved by many
- Jason Edwards 5/15/23
Select the correct answer.
If you increase the frequency of a sound wave four times, what will happen to its speed?
OA
The speed will increase four times.
OB.
The speed will decrease four times.
The speed will remain the same.
OD.
The speed will increase twice.
O E.
The speed will decrease twice.
Galaxies are a group of
Answer
gas, dust, and billions of stars and their solar systems, all held together by gravity.
Explanation:
Answer:
Galaxies are a group of stars held together by gravity.
hello please help i’ll give brainliest
Answer:
Acceleration is defined as the rate of change of velocity
Explanation:
Its A
If an atom becomes an ion by loosing 4 electrons, what will the net charge of the atom be? pls hurry NO LINKS!
1) -1.6 x 10^-19 C
2) - 3.2 x 10^-19 C
3) - 4.8 x 10^-19 C
4) -6.4 x 10^-19 C
Answer:
1) - 35
2) - 35
3) - 67
4) - 83
An ideal step-down transformer has a turns ratio of 1/106. An ac voltage of amplitude 170 V is applied to the primary. If the primary current amplitude is 8.10 mA, what is the secondary current amplitude
Answer:
[tex]I_2=0.8586A[/tex]
Explanation:
From the question we are told that:
Turns Ratio i.e[tex]\frac{N_2}{N_1}=\frac{1}{106} (step down)[/tex]
Voltage [tex]v=170v[/tex]
Primary current amplitude[tex]I_1= 8.10 mA =>8.10*10^{-3}A[/tex]
Generally the equation for a Transformer is mathematically given by
[tex]\frac{E_1}{E_2}=\frac{I_2}{I_1}=\frac{N_1}{N_2}[/tex]
Therefore
[tex]I_2=\frac{N_1}{N_2}*I_1[/tex]
[tex]I_2=106*8.10*10^{-3}[/tex]
[tex]I_2=0.8586A[/tex]
State the precautions taken to ensure accurate measurement when having an experiment using the principle of moment
Precaution: balance the ruler being used first.
Precaution: balance the ruler being used first.Use distances from the pivot of greater than 25 cm (250 mm).
Precaution: balance the ruler being used first.Use distances from the pivot of greater than 25 cm (250 mm).Weigh the unknown and known masses in your hands before using the ruler, and place the lighter mass as far from the pivot as possible.
Precaution: balance the ruler being used first.Use distances from the pivot of greater than 25 cm (250 mm).Weigh the unknown and known masses in your hands before using the ruler, and place the lighter mass as far from the pivot as possible.Measure distances from the pivot to the centre of mass of the object.
An object is moving at 4.66 m/s when it accelerates at 5.66 m/s2 for a period of 2.35 s. The distance it moves in this time is ____ m.
Answer:
S = 26.58 meters
Explanation:
Given the following data;
Initial velocity = 4.66 m/s
Acceleration = 5.66 m/s²
Time = 2.35 seconds
To find the distance travelled by the object, we would use the second equation of motion;
S = ut + ½at²
Where;
S represents the displacement or height measured in meters.
u represents the initial velocity measured in meters per seconds.
t represents the time measured in seconds.
a represents acceleration measured in meters per seconds square.
Substituting into the equation, we have;
S = 4.66*2.35 + ½*5.66*2.35²
S = 10.951 + (2.83 * 5.5225)
S = 10.951 + 15.629
S = 26.58 meters
A 37 kg object has an applied force of 85N [R] acting on it. The coefficient of
kinetic friction is 0.17. Calculate the acceleration of the object and its displacement
after 3.4s if it’s initial velocity was 2.2 m/s
Answer:
Explanation:
This is quite tricky! You need to do 2 different equations to solve all the parts of this problem. First is finding the acceleration in one dimension, which has an equation of
F - f = ma
where F is the applied Friction,
f is the frictional force acting against F,
m is the mass of the object, and
a is the acceleration of the object (NOT the velocity!)
This is Newton's Second Law expanded on a bit. The sum of the forces working on an object is equal to the object's mass times its acceleration. We have F, but we need f which is found in the equation
f = μ[tex]F_n[/tex] which is the coefficient of kinetic friction times the weight of the object. Weight is found in the equation
w = mg where m is mass and g is the pull of gravity. Let's start there and work backwards:
w = 37(9.8) to 2 sig figs so
w = 360N. Now fill that in to find f:
f = (.17)(360) to 2 sig figs so
f = 61. Now for the final answer in the original equation way back up at the top:
85 - 61 = 37a and do the subtraction on the left side first:
24 = 37a and then we divide to 2 sig figs to get
a = .65 m/s/s
Since we are moving in a straight line (as opposed to on an angle) the displacement is found in
d = rt which simply says that the distance an object moves is equal to its rate times the time. Therefore,
d = 2.2(3.4) to 2 sig figs so
d = 7.5 m
Find the current flowing across the 20 Ω
resistor. .
35 Ω
20 Ω
15 Ω
10V
[?]Α
Please no links
0.23 A across the 20-ohm resistor
Explanation:
The 20-ohm and 35-ohm resistors are in parallel so their combined resistance is
(1/20) + (1/35) = 0.0786 ohm^-1 or 12.73 ohms
These two are in turn connected in series with the 15-ohm resistor so the total resistance of the circuit is
R = 12.73 ohm + 15 ohm
= 27.73 ohm
Hence, the total current drawn by the circuit is
I = V/R = (10 V)/(27.73 ohm)
= 0.36 A
The potential across the 15-ohm resistor is
V1 = IR = (0.36 A)(15 ohm)
= 5.4 V
Now the potential across the 20-ohm and 35-ohm resistors is
V2 = V - V1 = 10V - 5.4V
= 4.6 V
This means that the current across the 20-ohm resistor is
I = V/R = (4.6 V)/(20 ohm)
= 0.23 A
Answer:
Answer would be 0.23
Explanation:
Put in 0.23
A chemical plant produces ammonia using the following reaction. What
trade-off is made by running the reaction at a high temperature?
3H2 + N2 + 2NH3 + energy
O A. The higher temperature decreases the forward reaction rate, and
the pressure of the system is also lowered.
O B. The higher temperature increases the reaction rate, but it also
favors the reverse read on.
C. The higher temperature increases the forward reaction rate, and
the higher pressure increases the reaction rate.
D. The higher temperature decreases the reaction rate, but it also
favors the forward reaction.
Answer: B
Explanation: The higher temperature increases the reaction rate but also favors the reverse read on.
The higher temperature increases the reaction rate, but it also favors the reverse read on. So, option B.
What is meant by rate of a reaction ?The pace at which the products are created from the reactants in a chemical reaction is referred to as the rate of reaction.
Here,
Generally, reactions progress more quickly as the temperature rises.
The average kinetic energy of the reactant molecules will rise with a rise in temperature. The number of molecules having threshold energy rises, increasing the quantity of efficient collisions that actually occur.
Therefore, as the temperature of the reaction is increased, the rate of the reaction increases. But also favors the reverse reaction.
Hence,
The higher temperature increases the reaction rate, but it also favors the reverse read on.
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A ball is dropped from rest on a cliff what is the speed of the ball 5 seconds later
Answer:
The velocity of the ball after 5 seconds will be 49 m/s
Explanation:
v = final velocity
u = initial velocity
g = acceleration due to gravity
t = time
Initial velocity of the ball = 0 (As the ball is dropped from rest )
Acceleration due to gravity = 9.8 m/s
Time taken = 5 sec
As the acceleration due to gravity is constant in both the cases we can use the equations of motion in order to solve this question
Part I :- As we already know the values of u,g,ant t we can use the first equation of motion in order to find v
Part II :- As we know the values of u, t , g we can use the second equation of motion in order to find s.
Velocity of the ball after 5 seconds
Distance covered by the ball in 5 sec
A ray of light exits from a material with a refractive index of 1.75, traveling into air. The angle of refraction is 25°. What was the original angle of incidence?
Answer:
θi = 47.7°
Explanation:
The formula for the refractive index is as follows:
[tex]n = \frac{Sin\theta_i}{Sin\theta_r}[/tex]
where,
n = refractive index = 1.75
θi = angle of incidence = ?
θr = angle of refraction = 25°
Therefore,
[tex]1.75 = \frac{Sin\ \theta_i}{Sin\ 25^o} \\\\(1.75)(Sin\ \ 25^o) = Sin\ \theta_i\\\\\theta_i = Sin^{-1}(0.739)[/tex]
θi = 47.7°
Un cuerpo se desplaza desde el punto 5,7 m al 7,5 en linea recta. cual es el valor del desplazamiento de la coordenada x?
Answer:
Δx = 2m
Explanation:
From the given information:
De la información dada:
El desplazamiento ocurrió en un vector que se mueve desde una posición inicial particular hasta el final.
Entonces, supongamos que el desplazamiento es D;
Luego:
D = (7,5 ) - (5,7)
D = (2, -2)
Por lo tanto, el valor del desplazamiento de la coordenada x; Δx = 2m
In which of the follwing media sound travels fast ? A . oxygen B . copper C . sea water D . steel
sea water is the answer to your question
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Sound travels faster in steel than in water. Similarly, sound travels faster in water than in air. This is because in solids, the distances between the molecules are closer and thus the atoms are more densely packed than in gases and liquids
Hope it helps!
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