Answer:
All atoms have a dense central core called the atomic nucleus. Forming the nucleus are two kinds of particles: protons, which have a positive electrical charge, and neutrons, which have no charge. All atoms have at least one proton in their core, and the number of protons determines which kind of element an atom is.
Explanation:
Approximately what percentage of the almost 1,500
highway deaths in Pennsylvania each year are
attributed to aggressive driving?
A. 50%
B. 60%
C.70%
D.80%
Answer:
50% are attributed to aggressive driving
The percentage of the almost 1,500 highway deaths in Pennsylvania each year attributed to aggressive driving will be 50%.
What is aggressive driving?Aggressive driving is defined as any behind-the-wheel activity that, without regard for safety, puts another person (or people) and/or property in danger.
Aggressive driving can vary from potentially dangerous conduct to serious assault.
From the data obtained the percentage of the almost 1,500 highway deaths in Pennsylvania each year attributed to aggressive driving will be 50%.
Hence option A is correct.
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W&P3)A janitor pushes a mop with a force of 52 N. If the mop handle is at an angle of 52 degrees above the horizontal, how much work is required to push the mop 4.6m?
Answer:
[tex]the \: required \: work is \to \\ \boxed{w = 147.3 \: J}[/tex]
Explanation:
[tex]the \: required \: force \: is \: the \: horizonal \: component \: of \: \\ the \: force \: f_{x} = 52 \cos(52) = \boxed{32.014396716 \: N} \\ the \: work \: to \: be \: done \: is \to \\ w = f \times s = 32.014396716 \times 4.6 \\ \boxed{w = 147.26622489 \: J}[/tex]
a tuck at rest starts to move and accelerated by 4m/s in 25 secondd. what is the velocity of the truck at the end offf the time?
Beer producers and bread bakers depend on types of yeast to respirate anaerobically to make their products.
True
False
Answer:
True
Explanation:
How should the student change the circuit to give negative values for current and
potential difference?
Answer:
changing the polarity or direction of the battery changes the sign of the voltage and the current
Explanation:
The sign of current and voltage are due to established conventions.
The way that a DC circuit with negative current values is by changing the polarity of the power source or by inverting the battery, this creates that the electrons move in the opposite direction
Changing the battery also changes the direction of the power difference, since the potential from positive to negative, in most cases negative is assigned a potential of zero volts
In summary, changing the polarity or direction of the battery changes the sign of the voltage and the current
Which state(s) of matter can be compressed?
А
train moves with
uniform velocity of 36km/h
for 1os, calculate
total distance travelled
travelled
Explanation:
Distance is the product of speed and time:
Distance is the product of speed and time:[math]36 \frac{km}{h[/math]} ×5seconds
Distance is the product of speed and time:[math]36 \frac{km}{h[/math]} ×5seconds = 180km3600seconds×seconds = 1803600 km
Distance is the product of speed and time:[math]36 \frac{km}{h[/math]} ×5seconds = 180km3600seconds×seconds = 1803600 km= 0.05 km
Distance is the product of speed and time:[math]36 \frac{km}{h[/math]} ×5seconds = 180km3600seconds×seconds = 1803600 km= 0.05 km= 20 m
Hope u this answer cleared ur doubt
if a net horizontal force of 175 N is applied to a bike whos mass is 43 kg what acceleration is produced
Explanation:
f=175N
m=43kg
a=?
know
f=ma
a=f/m
a=175/43
a=4.06m/s
If a net horizontal force of 175 N is applied to a bike whose mass is 43 kg, acceleration is produced 4.06 m/s².
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
Given in the question,
f = 175 N
m = 43 kg
a =?
know
f = ma
a = f/m
a = 175/43
a = 4.06 m/s²
If a net horizontal force of 175 N is applied to a bike whose mass is 43 kg, acceleration is produced 4.06 m/s².
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An object with an initial speed of 4.0 m/s accelerates uniformly at 2.0 m/s^2
in the direction of its motion for a distance of 5.0 meters. What is the final
speed of the object?
Question 2 The gravitational force between two objects with identical masses that are 10 m apart, is 2.67 x10-10 N. To the nearest kg, what is the mass of each object? -11 Nom? Se G= Universal Gravitational Constant = 6.67 x 10 kg? 2 kg O O 10 kg 20 kg O 200 kg
Answer 888990,0 kg
Explanation:
888990,0 kg is the mass of the object.
What is Gravitational force?
Any two mass-containing objects are attracted to one another by the gravitational force. Because it consistently attempts to pull masses together rather than pushing them apart, the gravitational force is known as attractive.
Newton's Universal Law of Gravitation is what it is known as.
Admittedly, you aren't pushing on those other objects all that much because you don't have a very large mass. Additionally, items that are very far apart from one another do not clearly tug on one another.
Therefore, 888990,0 kg is the mass of the object.
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20 POINTS.
URGENT HELP AND PLEASE EXPLAIN.
Student A states that when she sits down on a chair, she is exerting a force on the chair and that is all that happens. Student B states that when she sits on a chair, the chair is actually exerting a force back on her in reaction to her force exerted upon the chair Which student is correct and why?
Answer:
i think its student b (d)
Explanation:
it might be student b cuz every action creates an equal and opposite reaction
Student B states that when she sits on the chair, the chair is actually exerting a force back on her in reaction to her force exerted upon the chair because of newton's third law. Hence, option D is correct.
What is newton's third law?The third law of Newton asserts that when bodies interact, they exert forces that are equal in size and directed in the opposite direction. Another name for the third law is the law of reaction and action. This law is crucial for understanding issues with static balance, where all pressures are in balance, but it also remains true for bodies moving at a constant or accelerated speed.
It doesn't only use bookkeeping methods; the forces it represents are actual forces. For illustration, a book laying on a table exerts downward pressure equal to the weight of the book on the table. The table produces an equal and opposite force on the book in agreement with the third law.
Therefore, student B is correct that because of Newton's third law there is an equal and opposite action and counteracts the student's so that neither move.
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what was the main advantage of a dial phone over an operator-controlled switchboard
what is the density to the object g/cm3
PLEASE help and dont write silly stuff cuz i will report you
i want a Claim,Evidence, reasoning and a rebuttal.
Answer:
it is push or pull and it is machanical energy but the arrows are going out so it means it is pull
the reason is because it the arrows are going out that means they are using mecanichal energy bc they using hands the evedance is that we can identify the energy
Materials that resist the charges flowing through
are
Emotional Intelligence includes:
• sensitivity to others
•recognition that people's reactions may be hiding what they are truly feeling .
•always being kind to everyone in all situations
• d a and b .
• all of the above
The next question
Emotions that seem to happen to you are actually made by you
True or false
The law of conservation of matter states that matter can be neither created nor
destroyed. Your friend shows you the following chemical equation:
CaCO3+CaO+CO,
He says that because the oxygen atoms are split iretween two different molecules in
the products, the equation does not support the law of conservation of matter. Is
your friend right? Explain your answer.
The equation you wrote is incorrect,
the correct is: CaCO3+CaO+CO2
The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed. Therefore, the quantity of mass is conserved over time.
Your friend is incorrect in saying that this doesn't follow the law of conservation of mass. The molecule of oxygen is split up but the number of total atoms of oxygen is same. So, it follows the law of conservation of mass.
a bulldozer does a work of 50,000
Joules to move a boulder through a distance of 15m. how much force is applied to move the boulder
Answer:
Force applied by bull dozer is 3333.33 joules.
Explanation:
What is Latin word for "little lumps?"
Answer:
tura paulo
Explanation:
sry if im wrong ;)
why you are Mercury column in thermometer first decends slightly and then rises when placed in hot water?
Explanation:
Because When placed on hot water, the thermometer itself expands slightly first so the Mercury appears to be descending. After the thermometer expands slightly, the Mercury expands. Hence, Mercury column in thermometer first decends slightly and then rises when placed in hot water
Answer:
Any liquid in a container, when heated, at first it's level goes down a little, then rises.
It's because the container volume increases first, before the liquid gets hot. So the level goes down. It takes a little longer to heat up the whole volume of the liquid. A little later, as the liquid gets heated up, it expands faster than the container and the level rises.
In general, coefficient of thermal expansion is higher for liquids than solids.
This is why the mercury level first goes down then rises.
the glass cover not the bulb of thermometer is very thin? give reason
Answer:
Its made of glass with very thin walls to allow the heat from sample being measured to reach the liquid quickly for fast response and quick reading (improves the quickness of response by the thermometer).it has a vacuum above the liquid column so there is no resistance to the expanding liquid.
Explanation:
Hope you have a great day ;-)
Identifying Characteristics Common to All Protists Use the drop-down menus to complete the statements. All protists live in environments that are . All protists must . All protists have . All protists make or consume .
Answer:
Use the drop-down menus to complete the statements.
All protists live in environments that are
✔ wet
.
All protists must
✔ reproduce
.
All protists have
✔ a nucleus
.
All protists make or consume
✔ food
Explanation:
I got it right hope its the right one
Answer:
Use the drop-down menus to complete the statements.
All protists live in environments that are
✔ wet
.
All protists must
✔ reproduce
.
All protists have
✔ a nucleus
.
All protists make or consume
✔ food
.
Explanation:
What is the kinetic energy of a 620.0 kg roller coaster moving with a velocity of 9.00 m/s? Round to 3 significant
figures
0 2.790 J
5,580 J
025,100 J
050,200 J
Answer:
I think C
Explanation:
kinetic energy formula: 1/2mv^2
1/2(620kg)(9m/s)^2
1/2(620kg)(81m/s)
1/2(50220)
KE = 25110 J
plz help urgent
i will give brainliest
Answer:
The answer is D. Balanced forces
Hope it helps.......... pls mark as brainliest
If it takes the watermelon 1 second to reach the ground when it is thrown downward at 10 m/s, how tall are the stands?
gasoline burning in a car engine
Is what type of energy?
Answer:
convection
Explanation:
a five sentence summary about compounds
please it is do In 5min HELP ME PLZZZZ
Explanation:
Compounds are substances composed of two or more kind of atoms or elements joined together in a definite grouping. The properties of compounds are distinct from those of the individual elements that are combined in its make up.
There are several millions of compounds that are known. Compounds are derived from elements. They are usually represented by chemical formulae.
Convert the following.
a. 50°C into fahrenheit scale and kelvin scale
b. O K into fahrenheit scale and celsius scale
c. 104°F into celsius scale and kelvin scale
d. -200°F into Celcius scale and kelvin scale
Answer:
a-
50°C whn converted into K - 323 K
Only visibly rough surfaces have friction between them
A machine has mechanical advantage 2,what does it mean?
Answer:
The mechanical advantage of a machine is 2. Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 2 means that for example if you apply 100 N then your machine will multiply that force and generate 200 N .
