Answer:
a. Increases
b. Two objects that have opposite charges
Explanation:
a. As the amount of charge on two objects increases, the strength of the electrical force between the objects increases. decreases. varies. remains the same.
According to Coulomb's law, the electrical force, F between two charges q and Q is directly proportional to the product of the charges.
So, F ∝ qQ
So, if q and Q increase, their product increases and thus, the strength of the electrical force between them increases.
So, if the amount of charge of two objects increases, the strength of the electrical force between the objects increases.
b. For which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force? two positively charged objects two negatively charged objects two objects that have no charge two objects that have opposite charges
Since according to Coulomb's law, the electrical force, F between two charges q and Q is directly proportional to the product of the charges.
So, F ∝ qQ
If the same amount of electrons are added to both charges and the charges are opposite in sign, the magnitude of one charge increases while that of the other charge decreases. so the product qQ decreases and thus F decreases.
So, the electric force decreases when the same amount of electrons is added to two objects that have opposite charges.
Answer:
A increases
Explanation:
9. Bryce drove his car 10 km from his house to Belle Plaine. It took him 8 minutes. He got stopped at a long
traffic light on the return home and so he took 2 minutes longer on the return trip. What was Bryce's average
speed in km per minute? (3 pt)
Answer:
2 km/minuteExplanation:
Here, we are asked to calculate the average speed in km/minute.
As we know that,
Average speed = Total distance ÷ Total time takenHere,
→ Total distance = 10 km + 10 km
Because, he first drove 10 km from his house to Belle Plaine and then he again came back to his house.→ Total distance = 20 km
→ Total time = 8 minutes + 2 minutes
→ Total time = 10 minutes
Substitute the values in the formula of average speed,
→ Average speed = Total distance ÷ Total time taken
→ Average speed = 20km ÷ 10 minutes
→ Average speed = 2 km per minuteWhat is the intensity of sound produced by an elephant's call if it has a power of 0.45 W and you are standing 32.5 m away from the lumbering beast
Answer:
I = 1.36 x 10⁻⁴ W/m²
Explanation:
The intensity of the sound produced by the Elephant can be calculated by using the following formula:
[tex]I = \frac{P}{A} \\\\[/tex]
where,
I = Intensity of sound = ?
P = power of sound = 0.45 W
A = area = πr² = π(32.5 m)² = 3318.3 m²
Therefore,
[tex]I = \frac{0.45\ W}{3318.3\ m^2} \\\\[/tex]
I = 1.36 x 10⁻⁴ W/m²
can someone help? i don’t need 14
Answer:
Explanation:
11.) d
12.) f
13.) c
15.) i
pls give me brainliest
A bicycle with a mass of 100kg hit a wall at an acceleration of 4 m/s2, what is the force?
Answer:
400N
Explanation:
F= ma
F= 100 x 4
F= 400N
Most consumers first spend their disposable income on what
Answer:
They first spend it on necessities.
How many snowmen do you think this sled can destroy? Explain your answer.
Answer:
342,690
Explanation:
I think, given 342,690 snowmen down a giant hill, that sled could destroy every single snowman :)
The diagram below shows a periodic wave. Which two points on the wave are 180 degrees out of phase?
Please explain as well, thanks so much
Answer:
A and C are 180 deg out of phase (opposite points on a 360 deg wave)
The two points on the periodic wave which are 180 degrees out of phase are point A and Point C.
When two points of wave are out of phase?The two points of a wave is said to be out of phase when they show up or down motion at different times.
If a point on the wave, say (X) is reached to the maximum or minimum point before the other point. Then these two points are said to be out of phase.
Also, when the points are 180 degree apart from each other. Which means if a point is in the crest of the wave and other is on the through.
The diagram below shows a periodic wave. In this diagram,
A and I are the end points of the periodic wave.B,C,D,E,F and G are the other points on the periodic wave.Here, the point A and C are opposite point of each other. So they are 180 degrees out of phase.Hence, the two points on the periodic wave which are 180 degrees out of phase are point A and Point C.
Learn more about the periodic wave here;
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Determine the mass of fuel required for the expected energy consumption in the United States for the next 10 years:
Provide the energy use per person per year in the United States = 3.5 × 1011 joules.
Base your calculations on a current population of 310,000,000.
Answer:
(This will depend on the type of fuel, I will assume that the fuel is petrol)
First, let's find the expected energy consumption in the US for the next 10 years.
We know that in one year, a person consumes 3.5*10^11 joules.
There are 310,000,00 people on the US
Then the total consumption in one year is:
310,000,000*3.5*10^11 joules = 1.085*10^20 J
In 10 years the consumption is 10 times the consumption of a single year, then the expected energy consumption in the US for the next 10 years is:
10*1.085*10^20 J = 1.085*10^21 J
Now let's find the mass of fuel required.
We know that a liter of petrol has 31,536,000 joules of energy,
And a liter of petrol weights 0.75 kg
To find the number of liters of petrol that we need, we need to find the quotient between the expected energy consumption in the next 10 years and the energy of a single liter of petrol, this is:
N = (1.085*10^20 J)/(31,536,000 j) = 3.44*10^13
We will need 3.44*10^13 liters of petrol.
And the total mass of petrol will be:
M = 3.44*10^13*0.75 kg = 2.58*10^13 kg of fuel.
What element is formed in the following nuclear reaction
Answer:
Oxygen or more precisely, the O-15 isotope.
A wire lying along a y axis form y=0 to y=0.25 m carries a current of 2.0 mA in the negative direction of the axis. the wire fully lies in a magnetic field given by (0.3y)i + (0.4y)j Tesla. what is The magnetic force on the wire
A: (0.15i+0.2j) N
B: (0.0015i+0.002j) N
C: (-6.25E-5 k) N
D:(6.25E-5 k) N
E: None of the above
Answer:
E: None of the above
Explanation:
Since the force on the wire F = ∫idL × B where i = current in wire = 2.0 mA = 2.0 × 10⁻³ A, dL = vector length of wire = dyj and we integrate from y₁ = 0 m and y₂ = 0.25 m, and B = magnetic field = (0.3y)i + (0.4y)j
So, F = ∫idL × B
and we integrate from y₁ = 0 m and y₂ = 0.25 m
F = 2.0 × 10⁻³ A∫₀⁰°²⁵[dyj m × (0.3y)i + (0.4y)j]
F = 2.0 × 10⁻³ A∫₀⁰°²⁵[dyj m × (0.3y)i + dyj m × (0.4y)j]
F = 2.0 × 10⁻³ A∫₀⁰°²⁵[(0.3y) × dy(j × i) + 0.25 × (0.4y)(j × j)]
F = 2.0 × 10⁻³ A∫₀⁰°²°⁵[(0.3ydy(-k) + 0.1y)(0)]
F = 2.0 × 10⁻³ A∫₀⁰°²⁵(-0.3ydy)k
F = 2.0 × 10⁻³ A[-0.3y²/2]₀⁰°²⁵k
F = -2.0 × 10⁻³ A[0.3(0.25)²/2 - 0.3(0)²/2]k
F = -2.0 × 10⁻³ A[0.3(0.0625)/2 - 0]k
F = -2.0 × 10⁻³ A[0.3(0.0625)/2]k
F = -1 × 10⁻³[0.01875]k N
F = -[0.01875 × 10⁻³]k N
F = -[1.875 × 10⁻⁵]k N
Since the answer is not contained in the options, the answer is E.
the spring constant for each of these springs 100 000 N m-1. Calculate the distance that each of these rear springs is compressed by this vehicle as shown in the diagram above
Answer:
sorry
Explanation:
Which of the following statements best describes the method of energy conservation known as cogeneration?
Answer:
heat and power
Explanation:
is the simultaneous production of electricity and heat both of which are used
According to the graph, how many atoms would remain after two half-lives?
20 atoms
80 atoms
40 atoms
50 atoms
Answer:
Let No be initial no of atoms
N = N0 / 2 after 1 half-life
N = N0 / 4 after 2 half-lives
So after 2 half-lives 20 of the 80 atoms remain
The _____is a measure of the number of waves that pass a point in a given amount of time
over due by alot please help
Answer:
i would say the third one
Explanation:
may i be brainliest?
How can light be both a wave and a particle? What does that mean?
Answer:
Explanation:
Quantum mechanics tells us that light can behave simultaneously as a particle or a wave. However, there has never been an experiment able to capture both natures of light at the same time; the closest we have come is seeing either wave or particle, but always at different times.When UV light hits a metal surface, it causes an emission of electrons. Albert Einstein explained this "photoelectric" effect by proposing that light – thought to only be a wave – is also a stream of particles
Why is light considered a wave and a particle?
Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. They also found that increasing the intensity of light increased the number of electrons ejected, but not their speed
Heat is the measurement of energy from all the particles that are in a substance.
Please select the best answer from the choices provided : T/F
Explanation:
the correct answer is (true) if am not mistaking incase am wrong sorry
When 120 V is applied across a 20 m long wire, the magnitude of the current density was found to be 2 * 10 ^ 8 * A / (m ^ 2) . The resistivity of this wire is
Answer:
[tex]\rho=3\times 10^{-8}\ \Omega-m[/tex]
Explanation:
Given that,
Voltage, V = 120 V
The length of the wire, l = 20 m
The current density of the wire, [tex]\dfrac{I}{A}=2\times 10^8\ A/m^2[/tex]
We need to find the resistivity of this wire. We know that,
[tex]R=\rho \dfrac{l}{A}[/tex]
Where
[tex]\rho[/tex] is the resistivity of wire
Also, [tex]R=\dfrac{V}{I}[/tex]
So,
[tex]\dfrac{V}{I}=\rho \dfrac{l}{A}\\\\\rho=\dfrac{V}{l\dfrac{I}{A}}[/tex]
Put all the values,
[tex]\rho=\dfrac{120}{20\times 2\times 10^8}\\\\=3\times 10^{-8}\ \Omega-m[/tex]
So, the resistivity of this wire is equal to [tex]3\times 10^{-8}\ \Omega-m[/tex].
POSSIBLE 1. Which of the following are examples of a physical reactions: (1) ice melting, (2) pencil breaking, (3) iron rusting, (4) wood burning? a. 1.4 b. 3,4 c. 2.3 d. 1,2
Answer:
D) 1 & 2
Explanation:
Ice melting can be refrozen and although the pencil breaks, it doesn't change the chemical formula of the pencil
An area experiences thunderstorms with high winds and a drop in temperature. Which weather event most likely occurred? A. A stationary front moved through the area. B. A fast-moving warm front moved trough the area. C a fast-moving cold front moved through the area. D. A slow-moving warm front followed a fast-moving cold front through the area
Answer:
C a fast-moving cold front moved through the area.
Explanation:
This is because, since there is a there is a thunderstorm and high winds in the area, this can only be caused by a fast moving front. Also there is a temperature drop, this can only be caused by the fast moving cold front since a cold front has a low temperature.
Thus, for the area to experience thunderstorms with high winds and a drop in temperature, a fast-moving cold front moved through the area.
is a
The wire in a simple circuit
which forms an
unbroken pathway, allowing the
electric charges to flow.
A. switch
B. insulator
C. resistor
D. conductor
Answer:
I believe the answer is D: Conductor.
Se aplica una fuerza de 8N a un cochecito de 650 gramos. Calcula: a) aceleración, b)espacio recorrido en 5 segundos y c) velocidad a los 3 segundos si parte del reposo
Respuesta:
a) 12.3 m/s²
b) 153.75 m
c) 36.9 m/s
Explicación:
Paso 1: Información provista
Fuerza aplicada (F): 8 NMasa del cochecito (m): 650 gPaso 2: Calcular la aceleración (a) del cochecito
Usaremos la segunda ley del movimiento de Newton.
F = m × a
a = F/m = 8 N / 0.650 kg = 12.3 m/s²
Paso 3: Calcular el espacio recorrido (x) en 5 segundos (t).
Usaremos la siguiente fórmula cinemática para un movimiento rectilineo uniformemente acelerado.
x = 1/2 × a × t²
x = 1/2 × 12.3 m/s² × (5s)² = 153.75 m
Paso 4: Calcular la velocidad (v) a los 3 segundos si parte del reposo
Usaremos la siguiente fórmula cinemática para un movimiento rectilineo uniformemente acelerado.
v = a × t
v = 12.3 m/s² × 3 s = 36.9 m/s
Los cálculos dados serían los siguientes:
a). Aceleración = 12,3 m / s ^ 2
B). Distancia recorrida en 5 segundos = 153,75 m
C). Velocidad en 3 segundos = 36,9 m / s
Dado que,
Fuerza aplicada = 8N
Peso de la silla de paseo en gramos = 650g
a). To find the aceleración,
[tex]F = m[/tex] × [tex]a[/tex]
[tex]a = F/m[/tex]
[tex]= 8 N/0.650 kg[/tex]
[tex]= 12.3 m/s^2[/tex]
Now,
b). :-espacio recorrido en 5 segundos y
Using the Kinematic formula:
[tex]x = 1/2[/tex] × [tex]a[/tex] × [tex]t^2[/tex]
[tex]x = 1/2[/tex] × [tex]12.3 m/s^2[/tex] × [tex](5s)^2[/tex]
= 153.75 m
c). Using the same formula,
velocidad a los 3 segundos si parte
[tex]v = a[/tex] × [tex]t[/tex]
[tex]v = 12.3 m/s^2[/tex] × [tex]3 s[/tex]
= 36.9 m/s
Learn more about "Acceleration" here:
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true or false? rocks have organic materials and fossil remains in them
Answer:
trueeeee
Explanation:
how can a sound of a different note be produced in a guitar without changing the length of wire?
Answer:
how tightly strung the wire is
-- Make the string tighter or looser.
-- Keep the same length, but make the string thicker or thinner.
-- Touch the string at a point exactly 1/2, 1/3, 1/4, or 1/5 of its length from one end.
The bumper cars crash into each other and stop. Explain why both bumper cars stop after the crash. [4marks]
Answer:
The collision is inelastic
Explanation:
There are two kinds of collision; elastic collision and inelastic collision. In an elastic collision, both momentum and kinetic energy are conserved.
However, in an inelastic collision, kinetic energy is not conserved. So, when the bumper of two cars collide, the cars come to a stop because the collision is inelastic.
the light beam falls on the surface of the mirror at an angle of 50 ° and is reflected. What is the magnitude of the reflection angle of that fiber?
Answer:
The Magnitude of the angle of reflection equals that of Incidence from the Law of reflection
So its 50°.
Explanation:
A solid metal ball with a mass of 10.0 kg is placed on a smooth floor what force would be needed to accelerate the ball at a rate of 2.0 m/s2.
40 N
20 N
5 N
0.2 N
Use the drop-down menu to answer the question.
According to "Take a Closer Look", what type of lens is used to correct nearsightedness?
Answer: A.) concave lens
Explanation: i hope this helps shawtay :)
In general, a concave lens (also known as a diverging lens) is used to correct nearsightedness, as stated in "Take a Closer Look." Option C is correct.
What is the lens?A lens is an optical component that is used to refract (bend) and focus light. It is typically made of a transparent material, such as glass or plastic, and has a specific shape that allows it to alter the path of light as it passes through.
Here,
In general, a concave lens (also known as a diverging lens) is used to correct nearsightedness, as stated in "Take a Closer Look."
A concave lens is thinnest at the center and thicker at the edges, which causes light rays passing through the lens to diverge or spread out. By placing a concave lens in front of a nearsighted eye, the lens causes incoming light rays to diverge more before they reach the eye's lens, which then focuses them properly on the retina, resulting in clearer vision.
Learn more about the lens here:
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Suppose your class invites a person to give a speech. When you test out the sound system in the gym you find there are so many echoes the speaker cannot be understood. What needs to be done to fix this problem?
Answer:
You either need to lower the volume so the sounds intensity is lessened. Or you can pad the walls to absorb the sound rather than defect.
Explanation:
Sound intensity allows it to be heard further, but in an enclosed room it will start returning. Sound will deflect off of hard objects do to its interactions with solids. A softer and foamy material can dampen it.
A circuit has an overall resistance of 40 ohms and a current of 200mA.
What is the potential difference in this circuit?
Answer:
Hey!
_________________
Voltage (V) = 0.8V
Current (I) = 200 mA = 200/10^3 = 2/10
Resistance = ?
Resistance = Voltage / Current
Voltage = Current × Resistance
0.8 = 2/10 × Resistance
0.8×10/2 = Resistance
8/2 = Resistance
Resistance = 4 ohm
_________________
Hope it helps...!!!
Explanation: