Answers
Related Questions
Can a body have a constant speed but varying velocity?explain
Answers
Answer:
please give me brainlist and follow
Explanation:
Yes if the body is travelling with uniform speed in a circular track its speed remains the same but the velocity is non-uniform as the direction of the body is changing every time.
Ann and Jesse’s mom is driving them to school. They are listening to music on an FM radio station. When they ride in the car with their father, they sometimes listen to AM radio. Ann wants to find out the difference between AM and FM radio signals. She finds a diagram in an online search. How do the AM and FM radio waves compare? In your answer, explain how the wavelength affects the frequency of the radio waves.
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Answer:
the difference is that the carrier waves are altered. am waves amplitude (strength) is varied in the signal to get sound information. Fm waves frequency’s are varied based on the carrier signal.
Explanation:
When light is incident on a boundary between two mediums, it often slows
down or speeds up. When it does this, the path the light travels can change.
This is called:
A. diffraction
B. reflection.
c. translocation.
D. refraction
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Answer:
the answer is
D.refraction
what does the splitting of light into component colours through a prism indicate about the composition of sunlight?
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[tex] \huge\longrightarrow{ \mathfrak{ \underline{ Answer }}}[/tex]
The Sunlight is actually white in colour, but it's a mixture of seven different coloured lights of different wavelengths, and when sunlight is passed through a prism, it splits into its constituent units forming a spectrum when observed on a screen. And this shows that the Sunlight is composed of seven different coloured lights .
____________________________
They are :
Red ( highest wavelength )OrangeYellowGreen Blue Indigo Voilet ( lowest wavelength )____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
How to use electromagnetic spectrum in a sentence?
Answers
Answer:
The enemy can use his vision across a broadband of the electromagnetic spectrum . Our century has seen the entire electromagnetic spectrum opened for business.
Explanation:
Two metal spheres having charges of +4.0 × 10^–6 coulomb and +2.0 × 10^–5 coulomb, respectively, are brought into contact and then separated. What is the charge on each sphere after separation?
Answers
Answer:
The correct answer is "[tex]12\times 10^{-6} \ C[/tex]".
Explanation:
Given that,
[tex]Q1=+4.0\times 10^{-6} \ C[/tex]
and,
[tex]Q2=+2.0\times 10^{-5} \ C[/tex]
or,
[tex]=20\times 10^{-6} \ C[/tex]
then,
The total charge will be:
⇒ [tex]Q =Q1+Q2[/tex]
[tex]=(+4.0\times 10^{-6}) +(20\times 10^{-6})[/tex]
[tex]=24.0\times 10^{-6} \ C[/tex]
hence,
After separation, the charge on each sphere will be:
⇒ [tex]q=\frac{Q}{2}[/tex]
[tex]=\frac{24.0\times 10^{-6}}{2}[/tex]
[tex]=12\times 10^{-6} \ C[/tex]
An alpha particle (the nucleus of a helium atom, carrying a charge of 3.2x10 ^-19 C) moves at 5.5x10 ^7 m/s at a right angle to the magnetic field. If the particle experiences a force of 1.5x10 ^-14 N due to the magnetic field, then what is the magnitude of the magnetic field?
Answers
Answer:i think its 7.5
Explanation:
A light wave travels through water (n = 1.33) at an angle of 35°. What angle
does it have when it passes from the water into the glass (n = 1.5)?
ne sin(e)
Use the equation o, = sin
M₂
n, sing )
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Answer:
30.6 degrees
Explanation:
A light wave travels through water (n = 1.33) at an angle of 35°. It will have angle of 30.56° when it passes from the water into the glass (n = 1.5).
What is Refractive Index ?When a light is going from medium 1 to medium 2. The refractive index is defined as a ratio of velocity of light in medium 1 to velocity of light in medium 2. Refractive index is the factor which deals with the amount of bending of light. More refractive index means more it will bend in the medium 2. When it is 1 we can say that light has not been bent.
By Snell's law, Refractive index is given by,
sin (i) ÷ sin (r) = μ₂÷μ₁
where i is the the angle of incidence
r is the angle of refraction
μ₂ & μ₁ are refractive index of medium 2 and 1 resp.
Given,
Refractive index of water μ₁ = 1.33
Refractive index of Glass μ₂ = 1.5]
Angle of incidence i = 35°
Angle of refraction r = ?
Light is going from water to glass, hence by snell's law.
sin (i) ÷ sin (r) = μ₂÷μ₁
sin (35°) ÷ sin (r) = 1.5 ÷ 1.33
0.5735 ÷ sin (r) = 1.12781
sin (r) = 0.5735 ÷ 1.12781
r = 30.56°
Hence it passes from the water into the glass at angle of 30.56°.
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When assessing energy resources, it is helpful to use a measure called EROI, which is ________.
A. energy returned plus energy invested
B. energy returned minus energy invested
C. energy returned divided by energy invested
D. money invested in extraction and processing minus income from sales
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Answer: C. energy returned divided by energy invested.
Explanation:
The Energy Return on Investment (EROI) simply means the ratio of the amount of usable energy that is obtained from a particular resource to the amount of the energy that is being expended in order to produce the net amount of the energy.
When assessing energy resources, it is helpful to use a measure called EROI and this is the energy returned divided by energy invested.
Therefore, the correct option is C
There can be several
in an ecosystem?
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To make hot chocolate for you and your friends, you must melt 3.0 kg of snow (0.0°C) and heat it to 70.0°C to make the hot chocolate. Calculate the total amount of heat needed.
Heat of fusion of ice = 3.34 × 10^5 J/kg, Specific Heat of Water = 4180 J/(kg.K)
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Answer: [tex]18.798\times 10^5\ J[/tex]
Explanation:
Given
Mass of snow is [tex]m=3\ kg[/tex]
First snow is converted to water at [tex]0^{\circ}C[/tex] and then it is taken to [tex]70^{\circ}C[/tex]
Heat required to convert the ice into water at [tex]0^{\circ}C[/tex]
[tex]Q_1=3\times 3.34\times 10^5\\Q_1=10.02\times 10^5\ J[/tex]
Heat required to raise temperature from [tex]0^{\circ}C[/tex] to [tex]70^{\circ}C[/tex]
[tex]Q_2=3\times 4180\times (70-0)\\Q_2=8.778\times 10^5\ J[/tex]
Total heat required
[tex]\Rightarrow Q=Q_1+Q_2\\\Rightarrow Q=10.02\times 10^5+8.778\times 10^5\\\Rightarrow Q=18.798\times 10^5\ J[/tex]
How does an increase in greenhouse gases in the atmosphere cause an increase in global temperature?
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Answer:
Greenhouse gases absorb and emit radiation and less heat dissipates to spaceExplanation:
when heat is trapped it is conducted to the trapped area and gradually heats up its surrounding
A baseball is thrown at a 22.5° angle and an initial velocity of 65 m/s. What will be its horizontal
and vertical velocity?
Guys pls someone answer my question I have an exam and this question has 5 marks
Answers
Answer:
Horizontal component = 60.05 m/s
vertical component = 22.96 m/s
Explanation:
cosine(angle) = adjacent / hypotenuse or horizontal / angled velocity
angled velocity * cosine (angle) = horizontal velocity
65 m/s * cosine(22.5) = 60.05 m/s
sine(angle) = adjacent/ hypotenuse or vertical/ angled velocity
angled velocity * sine (angle) = vertical velocity
65m/s sine(22.5) = 22.96 m/s
pls somebody help me quick
Answers
Answer:
greater than
Explanation:
A bowling ball is bigger than a golf ball and greater than means bigger.
Which is true for a substance that releases energy? A. The energy release decreases the molecular motion and the kinetic energy of the substance. B. The energy release decreases the molecular motion but increases the kinetic energy of the substance. C. The energy release increases the molecular motion and the kinetic energy of the substance. D. The energy release increases the molecular motion but decreases the kinetic energy of the substance. E. The energy release is used only to change the state of the substance.
Answers
Answer:
Option B
Explanation:
what would the speed of this wave be?
(a) 5 m/s
(b) 50,000 m/s
(c) 100,000 m/s
(d) 5,000 m/s
Answers
Answer:
c) 100,000 m/s
Explanation:
You need to take the same wave length from the top graph and bottom one, so let's take half a wave length then in the top one that is 0.005, but in the bottom one it's 2000/4 = 500 because they are smaller and there are 4 half waves before you get to 2000, whereas in the top one there is 1 half wave before you get to 0.005 on the graph.
Now use speed = distance / time
speed = 500 / 0.005 = 100 000 m/s
What effect does this gene mutation have on a person?
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Answer:
Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes. A human example is cystic fibrosis. A mutation in a single gene causes the body to produce thick, sticky mucus that clogs the lungs and blocks ducts in digestive organs.
Explanation:
Write two properties electric field lines. Sketch electric field lines for an electric dipole
Answers
Answer:
Properties of an Electric Field
Field lines never intersect each other. They are perpendicular to the surface charge. The field is strong when the lines are close together, and it is weak when the field lines move apart from each other. The number of field lines is directly proportional to the magnitude of the charge.
Explanation:
Three resistors of equal resistance are connected in series as shown. Compared to the voltage provided by the battery, voltage across each of the resistors is .
Answers
Answer:
the voltage across each resistor is one third of the battery voltage
Explanation:
In a series circuit, the current is constant throughout the circuit, so the battery voltage is equal to the sum of the voltage drop in each part of the series circuit.
V = i (R₁ + R₂ + R₃)
in the exercise indicate that all resistance has the same value
R₀ = R₁ = R₂ = R₃
V = i 3 R₀
V = 3 V₀
V₀ = i R₀
V₀= V / 3
the voltage across each resistor is one third of the battery voltage
A ball travels around a roulette wheel with a radius of 0.4 m at a tangential velocity of 1.1 m/s. What is the period of the ball as it travels around the wheel?
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Answer:
T = 2.28 s
Explanation:
Given that,
The radius of the wheel, r = 0.4 m
The tangential velocity of the wheel, v = 1.1 m/s
We need to find the period of the ball as it travels around the wheel. Let it is T. We know that, the tangential speed is given by :
[tex]v=\dfrac{2\pi r}{T}\\\\T=\dfrac{2\pi r}{v}\\\\T=\dfrac{2\pi \times 0.4}{1.1}\\\\T=2.28\ s[/tex]
So, the period of the ball is equal to 2.28 s.
Suppose you are helping a friend move. The friend asks you stand in the back of a pickup truck to hold a piano because there is no rope available to tie it down. Explain why you should refuse this request.
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Explanation:
This exposes the individual to danger. Remember, the Newton Law of motion which says that an object under the state of rest will remain in that state (inertia) unless when acted upon by an external force.
In this scenario, standing at the back of the pickup truck presents danger especially if the truck suddenly stops; this individual would experience an upward thrust due to inertia that may disbalance him.
Water drips from a faucet at the rate of 150 drops in 120 seconds. What is the period?
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Answer:
.80
Explanation:
The period of the dripping faucet is 0.8 seconds per drip cycle.
What is the rate?The rate is a measure of how much something changes over time and is typically expressed as a ratio of two quantities with different units of measurement.
Here,
The period of a dripping faucet is the time it takes for one complete drip cycle. To find the period, we need to divide the total time by the number of drip cycles.
In this case, the faucet drips 150 times in 120 seconds, so the time for one drip cycle is,
120 seconds / 150 drips = 0.8 seconds/drip
Therefore, the period of the dripping faucet is 0.8 seconds per drip cycle.
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Make a list of things you pull at home
Please help ASAP. Its for my sister
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Answer: Chairs, Plants, Food, electronics, etc.
Explanation:
A light wave moves from diamond (n = 2.1) into water (n = 1.83) at an angle of 19°. What angle does it have in water?
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Answer:
θ = 0.3736
Explanation:
For this exercise, how light passes through two media separated by a distance, so its movement is governed by the law of refraction.
n₁ sin 19 = n₂ sint θ
let's use subscript 1 for diamond and sub start 2 for water
sin θo = n₁ / n₂ sin θ
sin θ =[tex]\frac{2.1}{1.83}[/tex] sin 19 0.325 56
θ = 0.3736
Force=k((q1q1)/r^2)
The force that one electrically charged object exerts on other charged objects can be calculated using Coulomb's law.
You can see this law here written in equation form. The q's represent the two charges, and the r the distance between
the charges. The constant kis 9109
Using this information, calculate the electric force exerted by a +2 coulomb charge on another +2 coulomb charge,
when the charges are 25 meters apart
A)1.44*10^11
B)5.76*10^11
C)8 Newton’s
D)64 Newton’s
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Answer:
transferred from one object to another. Charged objects can exert forces on other charged ... Electric charge can be measured using the law for the forces between charges
The electric force exerted by the +2 C on another +2 C when at a distance of 25 m is 5.76×10⁷ N
Coulomb's law equationF = Kq₁q₂ / r²
Where
F is the force of attraction K is the electrical constant q₁ and q₂ are two point charges r is the distance apart How to determine the force Charge 1 (q₁) = 2 CCharge 2 (q₂) = 2 CElectric constant (K) = 9×10⁹ Nm²/C²Distance apart (r) = 25 mForce (F) =?F = Kq₁q₂ / r²
F = (9×10⁹ × 2 × 2) / (25)²
F = 36×10⁹ / 625
F = 5.76×10⁷ N
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0. The volume of a cube is 27cm3. Find the length of edge of cube.
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Answer:
27 cm3
Explanation:
Seasons occur because _____. Earth is closer to the sun during the summer Earth's orbit is an ellipse Earth's tilt causes the sun's rays to hit unevenly Earth rotates faster at the poles
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Answer:
Earth's tilt causes the sun's rays to hit unevenly
Explanation:
The Earth orbit or rotate in it's axis or orbital plane. When it's rotate, it tilt from the sun rays Earth's tilt causes the sun's rays to hit the Earth unevenly Earth's axis is tilted about 23 degrees, which causes a variation or differences in the sun's latitude.causing it to vary by 23 degrees north of the equator at the start of northern summer to 23 degrees south of the equator at the start of northern winter. On Earth, that tilt is the primary reason for different seasons.
Una persona ha de fer una força horitzontal de 400 N per arrossegar amb M.R.U. Un moble de 900 N. El moble es desplaça 5 m sobre el sòl, que és horitzontal. Calcula el treball realitzat per la força que exerceix la persona, per la força de fregament i pel pes del moble.
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Answer:
Parte A
2000 J
Parte B
400 N
Parte C
900 N
Explanation:
Los parámetros dados son;
La fuerza horizontal con la que la persona arrastra los muebles = 400 N
El peso de los muebles = 900 N
La distancia que se mueve el mueble en el piso = 5 m
El tipo de movimiento del mueble = M.R.U. Movimiento de línea uniforme
Por lo tanto;
Parte A
Trabajo realizado = Fuerza × Dirección de movimiento de la fuerza
Por lo tanto;
Trabajo realizado en, W = 400 N × 5 m = 2000 J
Parte B
La fuerza horizontal aplicada para arrastrar el mueble = 400 N = La fuerza de fricción que actúa sobre el mueble
La fuerza de fricción que actúa sobre el mueble = 400 N
Parte C
El peso de los muebles se toma como dado 900 N.
The wasted energy in processing food is “lost” to ____.
mechanical energy
light energy
chemical energy
heat energy
Answers
The wasted energy in processing food is "lost" to heat energy .
What is heat energy ?The form of energy which is transferred between objects having different temperature is called heat energy.
How heat energy is lost in food processing ?In food processing heat transfer is an essential part. Baking , boiling , grilling , freezing etc . all activities are done for food processing. In all these processes heat energy is lost.Thus, we can conclude that heat energy is wasted in the food processing .
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Two positive charges of same magnitude are separated by some distance if we bring a unit positive charge from one charge to another electric potential ?
Answers
Answer:
Increases.
Explanation:
The electric potential increases when the two positive charges of same magnitude bring close to one charge to another because there is repulsive force between them due to same charge and when the two opposite charges move away from each other, the potential energy decreases. When two opposite charges are brought closer together, electric potential energy decreases while on the other hand, when we move opposite charges apart from each other than the work done against the attractive force that leads to an increase in electric potential energy.