Answer:
Friction does not depend on the amount of surface area in contact between the moving bodies or (within certain limits) on the relative speed of the bodies. It does, however, depend on the magnitude of the forces holding the bodies together.
Compare and contrast the electric forces with the gravitational force.
please help, i need this asap
Answer:
They both act between two bodies without any means of contact. However gravitational force acts on mass while the electric force acts on charge. Gravitational force are only attractive while electric field can be attractive/repulsive. Electric field is much stronger than gravitational field.
Explanation:
PLEASE HELP ME WITH THIS RIDDLE
Both of my parents gave me 250$ each and now I have 500$ and then I bought a phone for 450$ and now I have 50 dollars left so i gave my friend 30 dollars because he asked. Now I have 20$ left. Since I have 20$ left I’ll give my parents 10$ each and now they want from me 240$ each and in total I have 480$ to give to my parents but my friend gave my 30$ dollars back that I gave him and now I have 510$ where did that 10$ in the 510$ come from since I only got 500$ from my parents.
The problem is that at the end, you owe $480, so what you have is -$480 (instead of the $480 that is written on the riddle). And when your friend gives back the $30, you will owe $450, meaning that you have
-$450.
Where is the problem in the math?
Let's follow what you say with the proper equations.
Both your parents gave you $250, so now you have:
$250 + $250 = $500
Then you bought a phone for $450, so now you have:
$500 - $450 = $50
Then you gave $30 to your friend, so now you have:
$50 - $30 = $20
Then you gave $10 to each one of your parents, so now you have:
$20 - $10 - $10 = $0.
Now, each one of your parents wants the $240 ($250 - $10) back.
So you OWE $480 (you do not have $480, you owe it, here is the problem with the riddle reasoning).
It will be represented with a negative number:
-$480
When your friend gives you the $30 back, you add it to the above value (meaning that you give it to your parents):
-$480 + $30 = -$450
Now you owe $450 to your parents, which is the cost of the cellphone that you bought.
If you want to learn more about math reasoning, you can read:
https://brainly.com/question/25870256
Question 2 of 10
Which of the following statements agrees with the second law of
thermodynamics?
O
O A. Energy tends to increase.
O
B. Heat flows spontaneously from cold to hot.
O
O C. Heat cannot ever go from cold to hot.
O
D. Entropy tends to increase.
Answer:
D.Entropy tends to increase.
Explanation:
The second of thermodynamics states that the state of entropy of the entire universe,as an isolate system, will always increase over time
Can someone help me please? I’ve been trying to solve these questions all day.
#16
If we put a resistor in circuit it will slow the speed of current
Let's check ohms law
[tex]\\ \rm\Rrightarrow \dfrac{V}{I}=R[/tex]
So if resistance is more current is less#17
Again use ohms law
[tex]\\ \rm\Rrightarrow V=IR[/tex]
[tex]\\ \rm\Rrightarrow V\propto I[/tex]
Voltage must be increasedPLEASE HELP ME!! BEST ANSWER GETS BRAINLIEST!!
Describe how voltage, current and resistance behave in a parallel circuit.
Explanation:
Voltage:
Voltage is equal across all components in a parallel circuit.
Current:
The total circuit current is equal to the sum of the individual branch currents.
Resistance:
Individual resistances diminish to equal a smaller total resistance rather than add to make the total
Answer:
just to make the other person who answered brainlist!
Explanation:
Newton's discovery concerning how fast an object will change speed is the:
1st Law
3rd Law
2nd Law
Universal Gravitation
Answer:
I think its the second law..
Explanation:
Answer:
its the second law.
hope this helps! :)
The two thigh bones (femurs), each of cross-sectional area 10 cm² support the upper part of a human body of 40 kg. Estimate the average pressure sustained by the femurs.
Answer:
Explanation:
Pressure = Force / Area
Force is weight of the upper body = mass*gravity
= 40*10 (take g as 10m/s^2)
= 400N
Area of each bone = 10cm^2 and there are two thigh bones
Total area = 10*2
= 20cm^2
= 0.002m^2
Pressure = 400/0.002
= 200000 N/m^2
= 2*10^5 Pa
how can you prove with an experiment that convection take place in gases
Answer:
Hot air balloon
Explanation:
Hot air balloon - A heater inside the balloon heats the air and so the air moves upward. This causes the balloon to rise because the hot air gets trapped inside. When the pilot want to descend, he releases some of the hot air and cool air takes it place, causing the balloon to lower.
PLEASE MARK ME AS BRAINLIEST AND HAVE A NICE DAY
Mexico City is located at a lower latitude than Detroit. How do you predict the weather conditions would differ?
A. Mexico City would have higher average temperatures and levels of precipitation.
B. Mexico City would have lower average temperatures and levels of precipitation.
C. Mexico City would have higher average temperatures but lower levels of precipitation.
D. Mexico City would have lower average temperatures but higher levels of precipitation.
Answer:
I think C.
Explanation:
If I'm wrong, please do not hesitate to let me know
someone please answer this, ill give you brainliest and your getting 100 points.
Answer:
Volcanism
Explanation:
Earth consists of three parts ,UpperMantalcoreThe inner two are. made of lava which is erupted by volcanos
So volcanism is the answerWhich of the following can be studied to find out evidence for the internal structure of the Earth?
O Mountain Building
O Seismic Waves ✓
Seismic waves due to their tendency to travel anywhere on earth ,helps to find out the internal structure of the earth by cracking up the crust and finding out the core of the planet.O Volcanism
O All of the above
When do astronomers now think that the ""dark energy"" began to accelerate the expansion of the universe?.
Answer:
Cosmologists estimate that the acceleration began roughly 5 billion years ago. Before that, it is thought that the expansion was decelerating, due to the attractive influence of matter. The density of dark matter in an expanding universe decreases more quickly than dark energy, and eventually the dark energy dominates.
Explanation:
Pls, choose me as brainliest!
Answer:
1988
Explanation:
Dark energy was discovered in 1998 with this method by two international teams that included American astronomers Adam Riess and Saul Perlmutter and Australian astronomer Brian Schmidt.
A sound wave has a wavelength of 0.450 meters if it’s speed in cold air is 330 meters per second what is the wave’s frequency
Answer:
733.3Hz
Explanation:
V=fx
where V is velocity of sound wave ; 330m/s
f is frequency of sound wave ; unknown
x is wavelength of sound wave; 0.450m
substituting the values
V=fx
330=0.450f
f=733.3
What is the main difference between cardio and strength-training activities? A. Cardio activities increase your physical strength, while strength-training activities work your heart and lungs. B. Cardio activities work your heart and lungs, while strength-training activities strengthen your muscles. C. Cardio activities require short bursts of energy, while strength-training activities strengthen your body over long durations. D. Cardio activities improve your joints' range of motion, while strength-training activities work your heart and lungs.
Answer:
B: Cardio is really to improve your circulatory and etc while strength that's common sense
Explanation:
Answer:
B
Explanation:
5 10 points Sanzida conducted an experiment that required a wire carrying a current to be wrapped around a metal core. When she placed th metal rod, she observed the magnet move toward the rod. Which conclusion can Sanzida draw from this experiment? O The current in the wire has created a gravitational field with its south pole at the top of the rod. The current in the wire has created a magnetic field with its south pole at the top of the rod. The current in the wire has created a magnetic field with its north pole at the top of the rod. The current in the wire has created a gravitational field with its north pole at the top of the rod.
The current in the wire has created a magnetic field with its north pole at the top of the rod. A magnetic field influences electric currents.
What is a magnetic field?A magnetic field is a type of field that influences the position and direction of the electric current.
The magnetic field also refers to the one where magnetic forces act to shape an electrical current.
The only material and/or body capable of altering an electrical current in a magnetic field is the presence of another magnetic field.
Learn more about magnetic fields here:
https://brainly.com/question/14411049
1. Stored energy or energy due to position is known as ____________________ energy
Answer:
Potential energy
Explanation:
goodluck
Answer:
potential energy or gravitational potential energy
An airplane propeller rotates with an angular speed of 260rad/s. Through what angle does the propeller rotate in 5.0s? Give your answer in both radians and degrees
Answer:
I hope this will help......
Based on the chemical equation provided, use the drop-down menu to choose the coefficients that will balance the chemical equation.
( )H2 + ( )O2 → ( )H2O
Answer:
2h2+2o→2h2o is the answer
Answer:
2
1
2
Explanation:
During what moon phase is a lunar eclipse possible.
An object has a Mass of 13.03 kg and an Acceleration of 13.74 m/s² . What is the force on on the object ?
Question :-
An object has a Mass of 13.03 Kg and an Acceleration of 13.74 m/s² . What is the Force on the object ?Answer :-
Force on the object is 179.03 Newton .[tex] \rule {180pt} {2pt} [/tex]
Given :-
Mass = 13.03 KgAcceleration = 13.74 m/s²To Find :-
Force = ?Solution :-
As per the provided information in the given question, we have been given that the Mass of the object is 13.03 Kg . Acceleration is given 13.74 m/s . And, we have been aksed to calculate the Force on the object .
For calculating the Force , we will use the Formula :-
Force = Mass × AccelerationTherefore , by Substituting the given values in the above Formula :-
⇒ Force = Mass × Acceleration
⇒ Force = 13.03 × 13.74
⇒ Force = 179.03
Hence :-
Force = 179.03 Newton .[tex] \underline {\rule {180pt} {4pt}} [/tex]
A police officer on a mountain bike is cruising at a speed of 3.50m/s, when he sees a wanted
criminal, standing on a corner, 75m ahead of him. If the police officer accelerates at a rate of
2.00m/s^2, how much time will he take to reach the corner?
Answer:
7 seconds
Explanation:
please see paper!
vf² = vo²+2ad
vf=vo+at
vf²=3.5²+2.2.75
vf²=312.25
vf=17.67 m/s
vf=vo+at
17.67 = 3.5 +2t
t=7.085 s
What is gravity force
The force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface.
Answer:
Gravity is the force that keeps everything on the ground instead of it floaating around!
Explanation:
Without gravity, you would be floating round in your house dodging floating objects.
Hope this brings you down to earth!
Have an amazing day!
PLEASE RATE AND MARK BRAINLIEST!! :)
What is the gravitational potential energy of a 1 kg ball that is 2 meters above the floor?
a
3 j
b
9.8 j
c
19.6 j
d
21 j
e
29.8 j
Answer:
C
Explanation:
We have to use the formula for potential energy(mgh).
MGH=(1)*(9.8)*(2)=19.6
Which sound wave features are being described? number of wavelengths over time. distance travelled over time.
The sound waves are defined as the frequency of sound waves and the speed of the sound wave.
What do you understand by Sound Wave?The sound wave is defined as the back and forth motion of the particles in an elastic medium of mechanical waves.
The number of wavelengths passing through a point per unit of time is known as the frequency of the sound wave. Frequency is the number of waves produced by a source per second, it is measured in hertz (Hz).
The period of the sound waves is defined as when a sound wave completes one complete oscillation it is termed as the period and we measure it per second.
The speed of the sound waves is defined as the distance traveled by the sound wave in one second it is measured in meters per second. The speed of the sound wave describes the frequency as well the wavelength also.
Thus the sound waves are defined as the frequency of sound waves and the speed of the sound wave.
To know more about Sound waves follow
https://brainly.com/question/1199084
Answer:
frequency and speed
Explanation:
2022
Refer to the following series circuit: + R R, = 17.2 V R, = 52 1:11 V = 15V R, 1 I Calculate the total power developed in the circuit. P= Choose... watts Choose... 15 120 98 Submit Answer Skip C Notes
Series connection
R=R1+R2=10+5=15[tex]\Omega[/tex]V=15VNow
[tex]\\ \rm\Rrightarrow P=\dfrac{V^2}{R}[/tex]
[tex]\\ \rm\Rrightarrow P=\dfrac{15^2}{15}[/tex]
[tex]\\ \rm\Rrightarrow P=15W[/tex]
Does everything in a black hole contain a singularity?
Answer:
All black holes contain singularities, however not all singularities involve black holes. A neutron star may be dense, matter the size of a pinhead can weigh as much as the earth, but there seems to be a mathematical cut-off point beyond which a black hole is formed.
waves that move through matter are only called ______________ waves
what are the parts of a wave?
Answer:
crest. the top of a wave.
wave. moving swell on the surface of water.
wave height. the distance between a wave's trough and crest.
wavelength. the distance between the crests of two waves.
wave trough. the lowest part of a wave.
Explanation:
Answer: crest is the top of the wave
the trough is at the bottom of the wave
wavelength is the length of the wave
The amplitude of a wave is the highest amount of vibration that the medium gives from the rest position
The rest position is the position where a wave would be if there was no movement.
Explanation:
Provide a reason why houses are painted with dark colours in cold countries.
Answer:
which is necessary to keep the building warm. Light colors reflect the light hence they are wisely used in tropical ...
Here in the US, not all houses are painted dark colors. In years past, it was common for the ...
Dark colors absorb heat, which is why houses in cold countries are painted with dark colours.
What is the all time speed record for completing the iditarod?.
•What is the all time speed record for completing the iditarod?
Answer:
•In 2016, Dallas broke his own record, finishing in 8 days, 11 hours, 20 minutes and 16 seconds. In 2017, Mitch Seavey broke all previous records by finishing in 8 days, 3 hours, 40 minutes and 13 seconds, which currently stands as the fastest winning time for the Iditarod.
Explanation:
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#Carry On Learning
Write a personal narrative (from the perspective of the Earth) of your year long journey around the sun. Be sure to include information about the phases of the moon.
Here is a funny note
I started my journey through a rocket .Before which our team created a space satelite with suitable requirements which can handle sun's heat from closest .We took enough foods and minerals to take during our journey.We took around 2years to reach suns orbit .Then we travelled around it via our satelite .We collected some datas about it .Then we came back.That was a happy and adventurous journey.