Answer:
2 repel attracts light water
Answer:
A magnet has two poles.
Like poles repel each other and unlike poles attract
An electromagnet is used to separate large masses of iron scrap.
The strength of the magnetic field of an electromagnet is increased by inserting a core of soft iron.
In a torch we use a dry cell as the source of electricity.
To light a table lamp and to run a refrigerator, we use mains as the source of electricity.
A group of two or more cells is called a battery.
Conductors pass electricity through them.
PLZ FAST Scientific knowledge is both long lasting and always _______.
changing
non-observable
permanent
untestable
scientist use empirical evidence, logical thinking, and tests to ___ a scientific explanation.
Answer:
Explanation:
The only word I can think of is confirm.
I choose confirm because they have already used empirical evidence (evidence that is primarily found by the senses. We hear something, we see something, We smell something -- although this is rather rare. Probably we would hear or see something first). We've used logical thinking, and we've likely even performed experiments.
So we've done all the ground work. All of these things are needed to confirm a scientific thought or premise that has been proposed. All of them aim at confirming what we proposed.
Which property of a quarter is different on the International Space Station than it is on Earth?
Its mass
Its weight
Its volume
Its density
A sample of oxygen gas occupies a volume of 200 mL at a pressure of 720 torr. What volume will the gas occupy at a pressure of 800 torr if temperature is held constant
We have that the gas will occupy at a pressure of 800 torr if temperature is held constant a Volume of
[tex]V_2=0.18L[/tex]
From the Question we are told that
Initial Pressure [tex]P_1=720[/tex]
final Volume [tex]V_1=200mL[/tex]
Initial Pressure [tex]P_2=800[/tex]
final Volume [tex]V_2=?[/tex]
Generally the equation for Boyle's law is mathematically given as
[tex]P_1V_1= P_2V_2[/tex]
Therefore
[tex]V_2=\frac{ P_1V_1}{P_2}\\\\V_2=\frac{ 720*200}{800}\\\\V_2=180mL[/tex]
[tex]V_2=0.18L[/tex]
The gas will occupy at a pressure of 800 torr if temperature is held constant a Volume of
[tex]V_2=0.18L[/tex]
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which unit of measure is the correct SIunit to use in measuring the mass of a boulder?
o tons
o kilograms
o pounds
o ounces
Answer:
tons
Explanation:
Which unit is used to measure the mass of a computer?
Answer:
kilogram
Explanation:
will mark brainliest!
Answer:
Explanation:
Fa - u*m*g = m*a
Fa = u*m*g + m*a
Fa - m*a = u*m*g
u = [tex]\frac{Fa - m*a}{m*g}[/tex]
will mark brainliest!
Answer:
b=t-p(m-n)/s
Explanation:
Why is the perfect mechine is not possible in the real life?
Answer:
Because the mechanical advantage of the machine is affected by friction and weight but velocity ratio is not. So, mechanical advantage is less than velocity rate. Thus, the machine's efficiency is less than 100% and can't be a perfect machine
identify two ways in which friction is not useful in science
Answer:
Friction between brakes and the wheels of a car or bicycle helps the vehicles slow down.If you do not lubricate your bike regularly with oil, the friction in the chain and axles increases.y UD Eda
NF-22
11. A race car traveling at +44 m/s is uniformly accelerated to a velocity of +22 m/s over an
11-s interval. What is its displacement during this time?
a
We have to find acceleration first.
Initial velocity=u=44m/sFinal velocity=v=22m/sTime=11s=t[tex]\boxed{\sf Acceleration=\dfrac{v-u}{t}}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{22-44}{11}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{-22}{11}[/tex]
[tex]\\ \sf\longmapsto Acceleration=-2m/s^2[/tex]
Now Distance=sUsing second equation of kinematics
[tex]\boxed{\sf s=ut+\dfrac{1}{2}at^2}[/tex]
[tex]\\ \sf\longmapsto s=44(11)+\dfrac{1}{2}(-2)(11)^2[/tex]
[tex]\\ \sf\longmapsto s=484+(-1)(121)[/tex]
[tex]\\ \sf\longmapsto s=484-(121)[/tex]
[tex]\\ \sf\longmapsto s=363m[/tex]
Explanation:
[tex]we \: want \: to \: find \: displacement \\ we \: can \: use \: newtons \: laws \: of \: motion \\ s = ut + \frac{1}{2} a {t}^{2}....(1) \\here \: 44 = u \: (initial) \\ v = 22(final) \\ t = 11 \\ then \: \\ s = 44 \times 11 + \frac{1}{2} (\frac{22 - 44}{11} ) {11}^{2} \\ s = 484 + \frac{1}{2} \times \frac{ - 22}{11} \times 11 \times 11 \\ s = 484 - 121 \\ s = 363m \\ thank \: you[/tex]
A car starts from rest and after 10 seconds its velocity is 20 m/s. Find the acceleration and the distance travelled by it.
Answer:
a=[tex]2ms^{-2}[/tex] S=100m
Explanation:
a=?vi=0m/s
vf=20m/s
t=10s
a=[tex]\frac{vf-vi}{t}[/tex]
a=[tex]\frac{20-0}{10}[/tex]
a=2m[tex]s^{-2}[/tex]
S=?S=vit+[tex]\frac{1}{2}[/tex]a[tex]t^{2}[/tex]
S=0+[tex]\frac{1}{2}[/tex]*2*[tex](10)^{2}[/tex]
S=100m
3. ¿Cuál es la distancia focal de un espejo CONVERo sabiendo que un objeto colocado
a 4 cm de él da una imagen virtual situata a 2 cm del espeso? ¿Cuál es el radio de
curvatura del espejo? Determina también las características de la imagen sie
objeto mide 5 cm
i dont know for real
The small bunny exerts a force of 15 Newtons as it hops a distance of 3 meters to pass the large rabbit. How much work did the small bunny do?
45 Joules
0.2 Joules
18 Joules
5 Joules
Answer:
W = F × d
W = 15 × 3
W = 45 Joules
Help me with this quesiton
what is potential energy
Answer:
it is a type of energy with the formula of u=mgh
Explanation:
m means mass
g means gravitational field and
h means height
ecent communication with the inhabitants of Neptune has revealed that they have a Celsius-type temperature scale, but based on the melting point (0oN) and boiling point (100oN) of their most common substance, hydrogen. Further communications have revealed that the Neptunians know about perfect gas behavior and they find that, in the limit of zero pressure, the value of pV is 28 dm3atm at 0oN and 40 dm3atm at 100oN. What is the value of the absolute zero of temperature on their temperature scale
The absolute zero temperature is the smallest thermodynamic thermal limit, which is considered as a zero kelvin when the enthalpy, as well as the entropy of a cooled ideal gas, are of minimal value.
It is expressed by using the formula:
[tex]\mathbf{T_{abs} = T_N + k}[/tex]
where;
[tex]\mathbf{T_{abs } = absoulte \ temperature}[/tex]
[tex]\mathbf{T_N = temperature \ at \Neptune \ Scale}[/tex]
k = factor to convert temperature from absolute scale to Neptunian scale
N:B: An absolute temperature = zero (0) kelvin
From the information given, Using Ideal gas since it is used in Neptune:
PV = nRT
where;
P = pressureV = volumen = no of molesR = rate(constant)T = temperatureFrom the question, provided that the gas is the same and no new mass is added;
Then, we can equate the moles of gas in the given conditions as;
[tex]\mathbf{\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}....\dfrac{P_nV_n}{T_n}}[/tex]
Using:
[tex]\mathbf{\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}}[/tex]
where the value of;
P₁V₁ = 28 dm³ atm
T₁ = 0⁰ N
P₂V₂ = 40dm³ atm
T₂ = 100⁰ N
∴
[tex]\mathbf{\dfrac{28}{(0+K)}=\dfrac{40}{(K+100)}}[/tex]
By cross multiply;
28(K+100) = 40(0+K)
28K + 2800 = 0 + 40K
40K - 28K = 2800
12 K = 2800
K = 2800/12
K = 233.33° N
Recall that:
[tex]\mathbf{T_{abs} = T_N + k}[/tex]
[tex]\mathbf{0= T_N+ 233.33 ^0 N}[/tex]
[tex]\mathbf{ T_N= - 233.33 ^0 N}[/tex]
Therefore, we can conclude that the value of the absolute zero of temperature on their temperature scale is -233.33° N
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PLSS HELP NOWW!!!!!!(01.01 LC) Which is an example of the force of attraction between two objects that have mass? (2 points) a Magnetism b Gravity c Solar energy d Electricity
Answer:
pretty sure it is gravity
Answer:
Electricity
Explanation:
What is the car’s average velocity (slope) between “O” and “A”? (y2-y1 / x2-x1) = slope
(1,24) (0,0)
Please find the attached photograph for your answer. Hope it helps! Please do comment
The car’s average velocity is mathematically given as
V=4m/s
What is average velocity?Average velocity is simply the mean rate of change of position of a car over a period of different times and this can be used to attain velocity of a car that has been in different velocity states
What is the car’s average velocity?Generally, the equation for the Velocity is mathematically given as
V=(AI/OI)
Therefore
V=24/1
V=4m/s
In conclusion, the car’s average velocity
V=4m/s
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A 2.72 A current flows through a wire for
9.88 s. How much charge flows past a point
in the wire in that time?
[tex]\\ \rm\longmapsto I=\dfrac{Q}{t}[/tex]
[tex]\\ \rm\longmapsto Q=It[/tex]
[tex]\\ \rm\longmapsto Q=2.72\times 9.88[/tex]
[tex]\\ \rm\longmapsto Q=26.87C[/tex]
The amount of charge that flows past a point in the wire during that time is approximately 26.8976 Coulombs.
Electric charge is quantized, meaning it exists in discrete amounts and is measured in coulombs (C). The elementary charge, represented by the symbol "e," is the charge of a single proton or electron, approximately equal to 1.602 x 10^-19 coulombs. Protons carry a positive charge, while electrons carry an equal but opposite negative charge.
When electric charges are stationary, they create an electric field around them. When charges are in motion, they produce a magnetic field in addition to the electric field, leading to electromagnetic effects.
Charge is a fundamental property of matter that determines its interaction with electric and magnetic fields and is crucial to understanding and explaining various electrical and electromagnetic phenomena in the natural world.
To calculate the amount of charge that flows past a point in the wire use the equation:
Q = I * t
Where:
Q is the charge (in Coulombs)
I is the current (in Amperes)
t is the time (in seconds)
Given:
Current (I) = 2.72 A
Time (t) = 9.88 s
Substitute these values into the equation to find the charge:
Q = I t
Q = 2.72 A * 9.88 s
Calculating the product:
Q = 26.8976 C
Therefore, the amount of charge that flows past a point in the wire during that time is approximately 26.8976 Coulombs.
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help me please i dont understand
Answer:
0.58
Explanation:
Sinẞ = opposite ÷ hypotenuse
Sinẞ = 5 ÷ 8.6
Sinẞ = 0.5814
Sinẞ ≈ 0.58
Answer: 0.58
Explanation:
hope this helps
Fun Fact: Peanuts aren’t technically nuts
According to the law of conservation of energy, which statement must be
true?
A. Energy that is transformed is neither destroyed nor created.
B. Energy can change only from nuclear to chemical.
C. There is only one form of energy.
D. The total energy in a system can only increase over time.
Answer:
i hope it will help you
THANK YOU
Explanation:
thank you
calculate the frequency and time period of sound wave of 35 m wave length propagating at a speed of 3500m/s
Answer:
Frequency = 100 Hz
Time period = 0.01 sec
Explanation:
f= 3500/35 = 100
T = 1/f = .01
PLS FAST WILL GIVE BRAINLIEST Describe why atoms can be neutral when they contain charged subatomic particles.
Answer:
Atoms are neutral if they have the same number of charged protons and electrons, balancing positive and negative charges. As long as the numbers of electron and protons are the same, the charges will balance.
why does sound not transmit in vacuum
Answer:
because sound needs medium to transmit.
The sound is produced by vibration and if there is no medium there is no vibration and no vibration means no sound.
The motion of the particles is most orderly in
Answer:
Solids
Explanation:
Particles are most orderly in solids.
Define acceleration. Prove that v = u + at
Explanation:
[tex]\text{Acceration is the rate of change of velocity per unit time.}
\text{Suppose the initial velocity is }u,\text{ and the final velocity is }v.
\text{Then the change of speed is }v-u.
\text{If such velocity change takes }t\text{ seconds, the average acceleration is }a.
\text{So we write}[/tex]
[tex]\frac{v-u}{t}=a\implies v=u+at[/tex]
The digital payment system that enables sellers to accept payment at trade
shows, food trucks, concerts, or farm stalls is called a:
A. biometric authentication system.
O B. QR code.
O c. payment protection device.
D. mobile point-of-sale device.
SUBMIT
[tex] \large \mathfrak{Answer : }[/tex]
The Correct option is D. mobile point-of- sale device.
The digital payment system that enables sellers to accept payment at trade shows, food trucks, concerts, or farm stalls is called a mobile point-of-sale device. Thus, the correct option for this question is D.
What are the advantages of a digital payment system?The advantages of a digital payment system are as follows:
This type of payment system is cost and time-saving.It increases sales by reducing transaction costs.It is helpful in generating the invoice at any time.This mode of payment is paperless.The mobile point-of-sale device (mPOS) is cost-effective. It involves the breaking down of monthly maintenance and payments on the basis of a cloud-based subscription. It authorizes the sellers to accept the payment at trade. It is one of the fastest modes of payment.
Therefore, a mobile point-of-sale device is a digital payment system that enables sellers to accept payment at trade shows, food trucks, concerts, or farm stalls. Thus, the correct option for this question is D.
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How does the field of science gain knowledge and understanding?
A basic question about how science gains knowledge.
Science gains knowledge using the scientific method.
The first thing you need to understand here is the scientific method, with all the steps and a little explanation to each one.
Ask a question or find some problem to solve: (what you want to understand? In what area do you want to find new knowledge?) Perform research: (There is some existing knowledge in that topic?) Establish your hypothesis: (This is what you can conclude with the things you know, or what you expect to find) Test your hypothesis by conducting an experiment: (Perform an experiment to test your hypothesis, this is the most important part.) Make an observation: (Observe the outcome of the experiment) Analyze the results and draw a conclusion: (study what the outcome means) Present the findings: (Present what you learned to the scientific community, in this way the science gains knowledge).If you want to learn more, you can read:
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Answer:
Through the testing of hypotheses.
how do you measure the volume of irregular object? explain with diagram
Answer:
by using graphical meythod
