Answer:
[tex]\boxed {\boxed {\sf 36 \ Newtons}}[/tex]
Explanation:
According to Newton's Second Law of Motion, force is the product of mass and acceleration.
[tex]F=m \times a[/tex]
The mass of the wagon is 12 kilograms and the acceleration is 3 meters per square second.
m= 12 kg a= 3 m/s²Substitute the values into the formula.
[tex]F= 12 \ kg \times 3 \ m/s^2[/tex]
Multiply.
[tex]F= 36 \ kg*m/s^2[/tex]
1 kilogram meter per square second ( 1 kg*m/s²) is equal to 1 Newton (N)Our answer of 36 kg*m/s² is equal to 36 N[tex]F= 36 \ N[/tex]
The force required for the 12 kilogram wagon to accelerate at 3 meters per square second is 36 Newtons.
On the decibel scale,an increase of 1 dB means that sound intensity is increased by a factor of ________?
A.10
B.20
C.100
D 200
Answer:
A. 10
Explanation:
it increases by 10 each level
mark brainliest
If Europium (Eu) undergoes proton decay and loses 3 protons, which element will it become?
Answer:
Neodymium (Nd)
Explanation:
An element is made up of atom, which contains three subatomic particles namely; proton, electron, and neutron. In a neutral atom, the number of protons determines the atomic number of that element and the atomic number of an element is the identity of that element in the periodic table.
Hence, a change in the proton number of an element means a change in the atomic number and ultimately a change of that element. In this question, Europium (Eu) element with atomic number, 63, loses three protons. This means that that atom now has 60 protons, which denotes the atomic number of another element called Neodymium (Nd).
Therefore, Europium (Eu) element has become Neodymium (Nd) due to loss of protons.
All of the noble gases have _______ electrons in their outer shell
Answer:
8
Explanation:
All noble gasses have 8 electrons in their outer shell
Which is the temperature that Fahrenheit and Celsius thermometers would
read as the same number?
A. -40° c
B. -273° c
c. 100°C
D. 0° C
Answer:
–40o
Explanation:
A 2000 kg streetcar parked in a lot has a larger momentum than a 1000 kg car going 25 meters per second on the highway.
Answer:
Other than the fact that momentum is a "vector" quantity I wouldn't know.
If the car had a momentum opposite to the chosen positive direction then its total momentum would be negative.
Friction is defined as *
O a force that opposes motion.
O the rate at which velocity changes.
O the resistance of an object to a change in its velocity.
the speed of an object in a particular direction.
Answer:
O a force that opposes motion
HELP !!
Which of the following ranks these media according to the speed of sound in them from
fastest to slowest?
A. water > air > steel
B. steel > water> air
C. air > water > steel
D. air > steel > Water
Answer:
c
Explanation:
because air have the fastest speed
A stone is dropped from the top a 45m hign building how fast will it moving when it reaches the ground? Ande what will its velocity be?
Answer:
29.7 m/s fast, velocity is 29.7 m/s
Explanation:
Applying,
v² = u²+2gs...................... Equation 1
Where v = final velocity, u = initial velocity, g = acceleration due to gravity, s = distance.
Given: u = 0 m/s (dropped from height), s = 45 m
Constant: g = 9.8 m/s²
Substitute these values into equation 1
v² = 0²+2×9.8×45
v² = 882
v = √(882)
v = 29.7 m/s.
Hence the stone will be moving 29.7 m/s fast and the velocity is also 29.7 m/s
Scientific ideas about the solar system have changed over time. Which of them
following statements best compares older models of the solar system with the
currently accepted model?
A. In older models, Earth's distance from the sun changed, while in the current
model, Earth's distance from the sun is constant.
B. Older models showed planets moving in circular orbits, while in the current
model, planets move in elliptical orbits.
C. In older models, Venus was closest to the sun, while in the current model,
Mercury is closest to the sun.
D. Older models included ten planets, while the current model includes
eight planets
Answer:
Explanation:
If i'm not wrong and late it might be F
On 7th June 2017 more than 50% of the electricity generated in the UK was from renewable sources. (a) Suggest two environmental conditions in the UK on 7th June 2017.
Answer:
high sunlight intensity
high wind speed
Explanation:
The environmental conditions in the UK on 7th June 2017 are improved because the electricity generation in the UK is done by the renewable sources of energy.
What are renewable resources?A renewable resource, is a type of natural resource that will refill to replace the fraction destroyed by consumption in a finite length of time in a human timescale, either naturally or other periodic processes.
The environmental conditions in the UK are improved on 7th June 2017 due to following reasons ;
1. The renewable energy sources create comparatively low amounts of Gas (GHG) emissions and traditional pollution,
2. During manufacture and transportation. They do emit some emissions and pollutants.
3. Using fossil fuels to generate electricity that creates no greenhouse gas emissions and lowers some forms of air pollution.
4. Increasing energy diversity and minimizing reliance on foreign fuels.
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Which of the following has 5 significant digits?
O 0.00030
O 50,000
O 100.0300
O 500.00
Answer:
50,000
Explanation:
when we say significant digits we mean the numbers that matter when stating the value of the number.
0.00030 can be written as 0.0003 without affecting it's value, the last zero is not significant.
50,000 all of the numbers here are significant to its value if we take away a zero it becomes 5,000 which is not equal to 50,000. so every digit here is significant
100.0300 can be written as 100.03 without loosing any value
500.00 can be written as 500 without loosing any value. ( think of this as $500.00, this also equals $500)
You have a 6.00 V power supply, and
a 30.0 ohm and a 75.0 ohm resistor.
Find the current flowing out of the
battery if the resistors are connected
in parallel
Answer: 0.28 A
Explanation:
What are three things you already know about the game of baseball?
Answer:
The Positions are, Pitcher, Catcher, First base, second base, third base, shortstop, left field, Center field, and right field. Some pitches that they throw are, 4-seam fastball, Curveball, 2-seam fastball, Slider, Knuckleball, 12-6 Curve, Knucklecurve, Slurve, Changeup, Splitter, Cutter, Split-finger fastball, Sinker, Palm ball, Eephus pitch, Screwball, Cut Fastball, Circle Changup, and Forkball. I think thats all the piches i know.
The first law of thermodynamics is just another form of the _____.
A. Conservation of energy
B. Conservation of mass
C. Mass- energy equivalence
D. Mechanical equivalent
Un automovil de 900 kg toma una curva de radio de 40 m con una rapidez constante de 50 km/h. Cual es la fuerza neta necesaria para mantener al automovil moviendose en la curva circular
Answer:
Fc = 4340,93 Newton
Explanation:
Dados los siguientes datos;
Masa = 900 kg
Velocidad, V = 50 km/h a metros por segundo = (50 * 1000)/(60 * 60) = 50000/3600 = 13,89 m/s
Radio, r = 40 m
Para encontrar la fuerza centrípeta;
Fc = mv² / r
Fc = (900 * 13,89²)/40
Fc = (900 * 192,93)/40
Fc = 173637/40
Fc = 4340,93 Newton
Use the drop-down menus to identify the parts of the
diagram labeled A, B, and C.
Label A
Label B.
Label C
Answer:
Use the drop-down menus to identify the parts of the diagram labeled A, B, and C.
Label A
✔ battery
Label B
✔ light or bulb
Label C
✔ switch
Explanation:
The parts A, B and C are battery, light bulb and switch respectively.
What is meant by an electric circuit ?The electrical circuits are defined as the closed-loop or routes that create a web of electrical components through which electrons can move.
Here,
The given diagram is of an electric circuit.
Wires are used to construct this path, which is powered by a battery or another energy source.
Part A
The beginning of the point where electrons begin to flow is referred to as the source, known as the battery and the end of the point where electrons leave the electrical circuit is referred to as the return.
Part B
An electrically powered light bulb is a type of lighting source. By passing current through a small wire called a filament, light bulbs convert electricity into light. Tungsten is a substance that produces light when electricity is delivered through it, and this is often the material used to make the filament.
Part C
It is the switch. An electrical circuit can be broken by a switch by rerouting current from one conductor to another conductor or an insulator.
Hence,
The parts A, B and C are battery, light bulb and switch respectively.
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Pluto has a gravitational field strength (g) of 0.61. If you have a weight of 1000 N on the Earth (g = 10), what will your weight be on Pluto?
A. 0.61 N
B. 6.1 N
C. 61 N
D. 610 N
Reset Selection
Answer: Alternative D.
------------------------------------------------
To calculate the gravitational weight of other planets, the formula is used:
[tex]\large\boxed{{\mathbf{P = m \cdot g}}}[/tex]
Data:
Mass(m): 1000 N
Gravity(g): 0.61
Weight(p): ?
We replace data:
P = m × g
P = 1000 N × 0.61
P = 610 N
Result: Its weight on Pluto will be 610 Newtons (Alternative D).
Pleas answer all three no links I will report you brainliest if right and 50 points
Answer:
1. 30,000 Kelvin, or 53,540 Farenheit, or 29,726 Celcius
2. i'm not sure, I'm sorry. I know that there are several, and one of them is helium.
3. This fusion changes the inner composition of the star, eventually it becomes a red giant or supergiant
Explanation:
Hope this helps :)
whos correct and why? please help me with this
Answer:
Enrique is the correct answer Hope it helps you have a good day
Answer:
enrique is correct
Explanation:
thw earth is bigger than the moon and closer to the sun therefore a shadow is cast from the earth onto the moon as it orbits around the earth
[PLEASE HELP ASAP TY]
light is shone on a diffraction grating with d=2.25 x 10^-6 m. the first order (m = 1) maximum occurs at a 15.7 angle. what is the wavelength of the light in nanometers? (hint: the answer will be between 400 and 700)
[?] nm
Answer:
608.9 nm
Explanation:
trust me cutie
The wavelength of light in nanometers is 0.017 x [tex]10^{3}[/tex] nm.
We have -
d = [tex]2.25\times 10^{-6}[/tex]
n = 1 = order
θ = 15.7 degrees
We have to calculate the wavelength of light (λ) in nanometers.
What is diffraction?Diffraction is defined as the bending or spreading of light waves as it passes through the edge of an object or through a small slit (size of slit should be very very less then wavelength of light) is called diffraction.
According to the question, we can use the following relation to calculate wavelength as -
d sinθ = nλ
λ = [tex]\frac{dsin\theta}{n}[/tex]
λ = d sinθ (since n = 1)
λ = [tex]2.25\times 10^{-6}[/tex] x sin (15.7)
λ = 0.0079 x 2.25 x [tex]10^{-6}[/tex]
λ = 0.0177 x [tex]10^{-6}[/tex] m
We know that -
1 nanometer = [tex]10^{-9}[/tex] m
1 m = [tex]\frac{1}{10^{-9} }[/tex]
0.017 x [tex]10^{-6}[/tex] m will be equal to = [tex]\frac{0.017\times 10^{-6} }{10^{-9} }[/tex] = 0.0177 x [tex]10^{3}[/tex] nm
Hence, the wavelength of light in nano meters is 0.0177 x [tex]10^{3}[/tex] nm.
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a set of charged plates has an electric field of 1420 N/C between them. if the potential difference is 75.0 V, what is the separation between the plates?
Answer: 0.0528
Explanation:
acellus
Higher amplitudes sound will have a _____________________ sound while lower amplitude will have a __________________________ sound. 10. The speed of sound is dependent on density and temperature of the medium being used so that higher density or temperature will yield a (higher / lower) speed (Kinetic Molecular Theory). 11. Give an example of any resonance heard: 12. Give an example of any echo heard. 13. Give an example of any evidence that sound is energy traveling in waves.
Answer:
9) HIGHER AND LOWER INTESITY, 10) speed of sound must decrease.
11) guitar the strings, flute, 12) In the mountains, 13) sound of a low frequency horn (sub-wofeer)
Explanation:
In this exercise we are asked to complete the sentences.
9) the intensity of the sound is the square of the amplitude, the missing words are
HIGHER INTESITY
LOWER INTENSITY
10) the speed of sound is
v = [tex]\sqrt{\frac{B}{\rho} }[/tex]
and it is also related to temperature
v = [tex]v_o \sqrt{1+ \frac{T}{273} }[/tex]
We must be careful since the compressibility modulus (B) changes significantly between the solid, liquid and gaseous states, if we are in the same medium, the speed of sound decreases with increasing density. For a higher density the speed of sound decreases
Also the speed of sound increases with temperature, but its effect is less,
Therefore, by having these two effects in the opposite direction, the change in density is more important, so the speed of sound must decrease.
.
11) when you listen to a guitar the strings resonate with the instrument body
on the flute has a resonance between the blown air and the flute tube
12) When you are in front of a tall object, the sound is reflected and the echo is heard.
In the mountains, in the squares where there is a large object that reflects in sound
13) when we hear the sound of a low frequency horn (sub-wofeer) we feel the vibration of the air, this is an effect of the pressure energy of the sound on our chest
7. The Voyager 1 space probe was launched in the 1970's and is now the furthest
man-made object from earth - it has actually left the solar system. At its current speed it
could travel across the US, a distance of about 4500 km in 265 seconds (a little less
than 5 minutes!) What is its average speed in kilometers per second?
PLEASE HELP I NEED THE FORMULA AND ANSWER THANK YOU!!
Answer:
v = 16.98 km/s
Explanation:
Given that,
Distance, d = 4500 km
Time, t = 265 s
We need to find its average speed. The total distance covered divided by total time taken is called average speed of an object. So,
[tex]v=\dfrac{4500\ km}{265\ s}\\\\=16.98\ km/s[/tex]
So, the average speed is 16.98 km/s.
Anyone??????????????????
Explanation:
I believe it is b or c. most likely b
explain how a clinical thermometer should be sterilized and why
Answer:
Explain why it is not advisable to sterilise a clinical thermometer on boiling water at normal atmospheric temperature. A clinical thermometer has small temperature range. The glass will crack/burst due to excessive pressure created by expansion of mercury.
ILL GIVE BRAINLIEST!! please help and answer correctly!
During an extremely foggy day during the medieval era, an architect wants to determine the height of a building. He cannot see to the top of his building, but he stands on the roof and lowers a pendulum to the ground. If the pendulum swings with a period of 12 seconds, what is the height of the building?
Answer:
Height of the building = 35.78 m
Explanation:
Given that,
The time period of a pendulum is, T = 12 s
We need to find the height of the building. The formula for the time period of a pendulum is given by :
[tex]T=2\pi \sqrt{\dfrac{l}{g}}[/tex]
Where
l is the height of the building
[tex]l=\dfrac{T^2g}{4\pi^2}\\\\l=\dfrac{(12)^2\times 9.8}{4\times 3.14^2}\\\\l=35.78\ m[/tex]
So, the height of the building is 35.78 m.
What is the total resistance of the circuit shown below?
Answer:
R = 12 ohm
Explanation:
Resistance are in parallel
1 ÷ Resistance = 1 ÷ 20 + 1 ÷ 30
1/R = 50/600
1/R = 1/12
R = 12 ohm
A camera has a lens which is a curved piece of glass. This lens takes the beams of light from an object and redirects it to form a real image. The lens of a camera is shown below. Which of the following best describes how the cameral lens forms a real image.
A. The camera lens reflects light by bouncing it off of the lens.
B. The camera lens absorbs light as it travels through the lens.
C. The camera lens bounces light as it travels through the lens.
D.The camera lens refracts light when it travels through the lens and bends.
Answer:
D.The camera lens refracts light when it travels through the lens and bends.
Explanation:
because
1) A negative charge of 6C exerts an attractive force of 65N on a second
charge that is 0.005 m away. What is the strength of the second charge?
Answer: [tex]30.09\times 10^{-15}\ C[/tex]
Explanation:
Given
The first charge is [tex]q_1=-6\ C[/tex]
Attraction force [tex]F=65\ N[/tex]
the second charge is at [tex]0.005\ m[/tex] away
Suppose the second charge is [tex]q_2[/tex]
The electrostatic force is given by
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
Insert the values
[tex]65=\dfrac{9\times 10^9\times 6\times q_2}{[5\times 10^{-3}]^2}\\\\\Rightarrow q_2=\dfrac{65\times 25\times 10^{-6}}{54\times 10^9}\\\\\Rightarrow q_2=\dfrac{1625\times 10^{-6-9}}{54}\\\\\Rightarrow q_2=30.09\times 10^{-15}\ C[/tex]