Answer:
B
Explanation:
It is true that a neutral atom has the same number of electrons as it does neutrons.
The neutrons are neutral particles, whereas the electrons are negatively charged particles.
Instead of neutrons, a neutral atom has an equal number of protons and electrons. Because they have no charge, neutrons are electrically neutral particles. The negative charge of the electrons in the electron shells encircling the nucleus in a neutral atom balances the positive charge of the protons in the nucleus. In a neutral atom, the number of protons and electrons is therefore identical, but the number of neutrons is variable.
Hence, It is true that a neutral atom has the same number of electrons as it does neutrons.
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What do snow melting, water freezing to ice, and water boiling into steam have in
common? *
O
They involve a change in state.
They involve a change in temperature.
O
They involve a change in thermal energy.
All of the above are true.
Answer:
All of the above.
Explanation:
why does people hit there kids
Not sure what this has anything to do with physics but in my opinion most do it to teach them a lesson not to do something again others take there anger on their kids e.g if they are drunk and some take pleasure in hitting their kids for no apparent reason.
Answer:so kids can learn not to do the same thing over agin
Explanation:
Read the ruler in centimeters to the correct degree of precision.
12.0
12.05
12.10
12.13
Answer:
Option B
Explanation:
One centimeter is equal to10 mm. The reading on the scale lies with in the mark of 12 and its adjacent division.
This length between two sub units is equal to 1 mm. Since the scale shows falls somewhere between 1 mm unit of length, it can be taken as half of it i.e 0.05 mm.
Hence the total length would be 12.05 mm
Option B is correct
12.05 mm
I hope this helps you
What needs to be done to balance this
equation?
CHA
O2
CO2
+ 2 H20
Remove coefficient 2 in front of
H2O on the right side of the
equation
Do nothing (equation is balanced).
Add coefficient 2 to O2 on the left
side of the equation.
Change O2 to Os on the left side
of the equation
Answer:
I'm not sure, but "Add coefficient 2 to O2...". You didn't really write out the equation properly.
What do you think happens to the temperature when water changes to gas?
Answer:
it gets hot and more hot until it turns to gas
Explanation:
a force of 20 N acted on a ball thereby imparting an impulse of 70 Ns to the ball. For how long did the force act on the ball?
Answer:3.5 seconds
Explanation:
4 newtons, 4 amps, 4 joules, 4 watts, 4 ohms, 4 volts
what does I=
Answer:
I [tex]= 4[/tex] amperes
Explanation:
Newton is the unit of force. Hence 4 newton is not the current “I”
Joules is the unit of energy and hence it do not signify current I
Watt is the unit of power i.e the rate of transfer of energy.
Ohm is the unit of resistance produces thereby obstructing the flow of current
And Volts is the unit of voltage or potential difference between two ends of an electric circuit. Thus, it is also does not signifies current.
Thus, I [tex]= 4[/tex] amperes
The echo of your footsteps returns in 0.50 second. How long is the corridor in which you are walking? (Assume the speed of sound for 0°C.)
Answer: The corridor is 82.825 meters long
Explanation:
Hi, to answer this question we have to apply the next formula:
d = (t×c)/2
Where:
Speed of sound c = 331.3 m/s at 0°C
t = time = 0.5 s.
d = distance
Replacing with the values given:
d = (Δt×c)/2 = 0.5×331.3/2 = 82.825 m
The corridor is 82.825 meters long
Feel free to ask for more if needed or if you did not understand something.
Science Will give brainless and 22 points
Answer:
Mercury 0.39 AU, 36 million miles
57.9 million km
Venus 0.723 AU
67.2 million miles
108.2 million km
Earth 1 AU
93 million miles
149.6 million km
Mars 1.524 AU
141.6 million miles
227.9 million km
Jupiter 5.203 AU
483.6 million miles
778.3 million km
Saturn 9.539 AU
886.7 million miles
1,427.0 million km
Uranus 19.18 AU
1,784.0 million miles
2,871.0 million km
Neptune 30.06 AU
2,794.4 million miles
4,497.1 million km
Pluto (a dwarf planet) 39.53 AU
3,674.5 million miles
5,913 million km
Answer:
Mercury 0.39 AU, 36 million miles 57.9 million km
Venus 0.723 AU 67.2 million miles 108.2 million km
Earth 1 AU 93 million miles 149.6 million km
Mars 1.524 AU 141.6 million miles 227.9 million km
Jupiter 5.203 AU 483.6 million miles 778.3 million km
Saturn 9.539 AU 886.7 million miles 1,427.0 million km
Uranus 19.18 AU 1,784.0 million miles 2,871.0 million km
Neptune 30.06 AU 2,794.4 million miles 4,497.1 million km
Pluto (a dwarf planet) 39.53 AU 3,674.5 million miles 5,913 million km
Explanation:
volcanos create rich soil for farming true or false
(30 points)
An electric motor converts electrical energy into energy.
Answer:
into mechanical energy
...........,.
Mechanical energy it’ll turn into mechanical
How does planting high yield crop varieties make farming more sustainable
Answer:
The more high yield crops are planted, the more production there will be from plants.
Explanation:
High-yield plants are plants that are genetically modified or modified artificially in a way that makes farming plants more efficient. More crops grow, therefore more money.
The answer is, the more high-yield plants there are, the more efficiency there will be from farming.
Answer:
Its D
Explanation:
my options were these
A. It increases the amount of water needed
B. It keeps soil fertility from diminishing over time
C. It keeps chemicals form entering the watershed
D. It decreases the amount of land needed
Plz help! Will give brainiest!
For the girl to lift this rock, she must push her end down _____ to raise the rock _____.
A. a lot; a little
B. a little; a lot
C. a little; a little
Answer:
A is the correct answer
Explanation:
mark brainliest please
Adding oil to a car's engine reduces _____, which means less _____ is created by moving parts rubbing together.
A. friction; heat energy
B. heat energy; friction
C. friction; kinetic energy
D. heat energy; potential energy
Answer:
A.) friction, heat energy
Explanation:
Adding oil to something makes it slick, which in turn reduces friction, and When you reduce friction, you also reduce heat energy.
Answer:
The Answer is A: friction; heat energy
At t = 0, a car has a speed of 30.0 m/s. At t=6.00 s, its velocity is 12.0 m/s.
What is its average acceleration during this interval? plz help...
Answer: [tex]-3m/s[/tex]
Explanation:
[tex]a=\frac{V_2-V_1}{t}[/tex]
[tex]a=\frac{12-30m}{6s}\\a=-\frac{18m}{6s}\\ a=-3m/s[/tex]
We have a negative acceleration, meaning that the car is slowing down.
Why are force fields used to describe magnetic force? A. Magnetic force acts between two objects that are not touching. B. Magnetic force is a form of gravity. C. Magnetic force acts between any two objects with mass. D. Magnetic force can only attract objects.tic force?
Answer:A
Magnetic force acts between two objects that are not touching
Explanation:other choices are not specific enough (method of elimination)
The electromagnetic force, one of the four fundamental forces in nature, produces the magnetic force, which is caused by the movement of charges. Thus, option A is correct.
What force fields used to describe magnetic force?Compass needles, motors, refrigerator magnets, railroad tracks, and modern roller coasters all use magnetic force.All moving charges produce a magnetic field, which exerts a force on any charges that cross its boundaries.
Moving electric charges generate magnetic fields. Everything is constructed of atoms, and each atom has an orbiting nucleus that is composed of protons and neutrons.Due to the circling electrons' small size and motion, each atom is surrounded by a mild magnetic field.
Therefore, When two charge-containing objects move in the same direction, a magnetic attraction pulls them together.
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An ohmmeter is a common device for measuring resistance. Using an ohmmeter, you find that a certain material has a very high resistance. This material is most likely what?
conductor
insulator
semiconductor
superconductor
Answer:
An insulator
Explanation:
Insulators have a very high resistance because the electrons of the insulator are bounded strongly with the nucleus. Hence it requires more voltage to move an electron from the valence band to the conduction band.
An ant starts at −5 m and moves 10 m left, 25 m right, 30 m left, and 5 m right. If the positive x-axis is to the right, what are the final position and total displacement of the ant?
A. position: −15 m; displacement: 70 m
B. position: 5 m; displacement: 10 m
C. position: 5 m; displacement: −70 m
D. position: −15 m; displacement: −10 m
Answer: D.
position: −15 m; displacement: −10 m
Explanation:
Displacement is the distance travelled in a specific direction.
Given that an ant starts at −5 m and moves 10 m left, 25 m right, 30 m left, and 5 m right
Total displacement = -10 + 25 - 30 + 5
Total displacement = -10
And the position = -10 -5 = -15
The correct answer is therefore D.
position: −15 m; displacement: −10 m
If Earth was with no tilt, would we still have seasons at all? If so, how would they be different?
Answer:
If earth had no tilt, we would have no seasons.
Explanation:
As stated in the answer, if the earth had no tilt we wouldn't have seasons. The earth all around the globe would maintain the same temperature,
And due to the no tilt it would also change our orbit to a bit larger slant, in January when we are at our closest to the sun we WOULD have a mini summer. For the North and South Pole, they would remain cold.
You are a traffic accident investigator. You have arrived at the scene of an accident. Two cars of equal mass (1,000 kg each) were involved in a rear-end accident at a stop sign. Here is what you know: Car 1 approached the intersection from the top of a 25-meter hill. Car 2 was on a flat stretch of road directly in front of Car 1. At the bottom of the hill, Car 1 was going 20 m/s; Car 2 was going 30 m/s before it stopped at the stop sign. There were no skid marks left by Car 2. The collision occurred at the stop sign, where Car 2 had stopped. After the collision, both cars were moving together in the same direction at 10 m/s before slowly rolling to a stop. You must now push Car 2, using 800 N of force, 10 meters off to the side of the road so no one else gets hurt.
1. What was the potential energy of Car 1 at the top of the hill? (3 points)
2. What was the kinetic energy of each car before braking? (4 points)
3. A. How much energy did Car 1 lose from the top to the bottom of the hill? (3 points)
B. Where do you suppose that energy went? (2 points)
4. How much work was done to bring Car 2 to a stop? (4 points)
5. If Car 2 came to a stop in 15 seconds, how much power (in watts) did it take to stop Car 2 at the stop sign by applying force to the brakes? (3 points)
6. What is the final combined momentum of the cars right after the accident? (6 points)
7. Assuming that there are no other nonconservative forces involved, what impulse was given to each car during the collision? (6 points)
A. Car 1 (3 points)
B. Car 2 (3 points)
8. How much energy did Car 1 lose in the collision? (3 points)
9. How much energy did Car 2 gain in the collision? (3 points)
10. Which of the two laws covered in this unit - Law of Conservation of Momentum or Law of Conservation of Energy - is obeyed in this problem? Explain your reasoning. (5 points)
11. How much work did it take to move Car 2 off to the side of the road? (3 points)
12. If it took you 40 seconds to move Car 2 off the road, how much power did you expend? (3 points)
13. Which simple machine does a car have that helped you move Car 2? Explain. (2 points)
Static electricity is an excess of neutrons.
A True
B. False
Answer: Static electricity is an excess of neutrons-FALSE
Explanation:
A P E X
The products of photosynthesis _____.
are the same as the products of cellular respiration
provide the energy needed to start cellular respiration
provide the reactants needed to start cellular respiration
provide the reactants needed to start cellular respiration
Explanation:
The thing you should know is that photosynthesis is exactly opposite from cellular respiration.
the products of photosynthesis are the oxygen and the organics.
And the oxygen and the organics are also the reactants of the cellular respiration.
Answer:Water
Explanation:
Read more from the chapter
What can happen if the excretory system doesn't work properly ?
Charge q is 1 unit of distance away from the source charge S. Charge p is four times further away. The force exerted
between S and q is ___ the force exerted between S and p.
1/4
1/16
16 times
4 times
Which statement correctly describes the differences between positive and negative acceleration?
Positive acceleration describes a change in speed: negative acceleration describes no change in speed.
Positive acceleration describes no change in speed; negative acceleration describes a change in speed.
Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.
Positive acceleration describes a decrease in speed negative acceleration describes an increase in speed.
Answer: positive accel.=increase in speed
negative accel.= decrease in speed
Explanation:
The distance from the maximum disturbance to the undisturbed position is the____ of a wave
Answer:
The amplitude of a wave is its maximum disturbance from its undisturbed position
4. Unlike a gas, plasma can
Answer:
Unlike a gas, plasma can conduct electricity and respond to magnetism. That's because plasma contains charged particles called ions.
Answer:
a) The pressure in a traveling sound wave is given by the equation
p Pa π m x s t − − Δ = −
s x, t 6.0 nm cos kx+ 3000 rad / s t+ ( )( ) ( ) ( )
Find the (a) pressure amplitude, (b) frequency, (c) wavelength,
and (d) speed of the wave.
b) If the form of a sound wave traveling through air is
= ϕ , how much time does any given air molecule along
the path take to move between displacements s = + 2.0 nm and s = - 2.0 nm?
Solution: (a) The amplitude of a sinusoidal wave is the numerical coefficient of the sine (or
cosine) function: pm = 1.50 Pa.
We identify k = 0.9π and ω = 315 π (in SI units), which leads to f = ω /2 π = 158 Hz.
We also obtain λ = 2π/k = 2.22 m.
The speed of the wave is v = λ /k = 350 m/s.
(b) Without loss of generality we take x = 0, and let t = 0 be when s = 0. This means the
phase is φ= -π/2 and the function is s = (6.0 nm)sin(ωt) at x = 0. Noting that ω = 3000 rad/s,
we note that at t = sin-1(1/3)/ω = 0.1133 ms the displacement is s = +2.0 nm. Doubling that
time (so that we consider the excursion from –2.0 nm to +2.0 nm) we conclude that the time
required is 2(0.1133 ms) = 0.23 ms.
What is true of both gravity and magnetism?
Both are dependent on mass.
Both forces can act without objects touching.
Both forces are directly proportional to the distance between the objects.
Neither is a fundamental force of nature.
Explanation:
I want to say option B - Both forces can act without objects touching.
Somebody can tell me what answers it is?
Answer:
D
Explanation:
The color you see is the color the object reflectes. The rest of the color are absorbed by that object.
is friction and pushing similar ????
Answer:
Yes, they are.
Explanation:
Answer:
No.
Explanation:
Pushing is the act of moving an object "forward" or towards the desired location.
Friction generally occurs when two surfaces (in this case, the ground and the object you are pushing) rub against each other. Gravity & the heaviness of the object will act as the counter to the force applied to push the object. Friction is the object trying to stay still, while pushing is trying to move the object.
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