Answer:
2H2+O2➡️2H2O is balanced. I think.
What effect does force have on the motion of an object?
Answer:
When a force acts on an object that is stationary or not moving, the force will cause the object to move, provided there are no other forces preventing that movement. If you throw a ball, you are pushing on it to start its movement. If you drop an object, the force of gravity causes it to move.
hope this helps :)
25 POINTS !!!! PLS HELP
Answer:
G
Explanation
The acceleration of gravity is constant, and = 9.8 m/s² , no matter what mass of the object is. Initial speed for both objects = 0 m/s. So, after 2 sec the objects will have the same speed and the same distance.
Answer G: speed=v, distance =d.
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
50W of power is generated using 100J of work to move a box onto a shelf. How long did it take to move the box from the floor to the shelf?
Answer: time t = 2 seconds
Explanation:
Given that
Power P = 50W
Energy E = 100J
How long did it take to move the box from the floor to the shelf ? This implies time taken.
Power is defined as the rate at which work is done. I.e
P = W.D/t
Where work done = energy
50 = 100/t
Make t the subject of formula
t = 100/50
t = 2 second
The diagram shows the field lines near the poles, X and Y, of two magnets.
At left a rectangular box with the long horizontal side labeled X. At right a rectangular box with the long horizontal side labeled Y. There is a gap between the boxes. Curved lines with arrowheads emerge from the right end of X and the left end of Y and point up and down.
Based on the field lines, what are the poles of the magnets?
X: north
Y: south
X: south
Y: north
X: north
Y: north
X: south
Y: south
Answer: I think it is C
Explanation: sorry if it wrong
Answer:
C
Explanation:
got it right on edge
Alex has to pick up a 20 N stack of documents and raise them 5 meters from the floor.
A. How much work does Alex do on the stack of documents as he lifts it?
B. While Alex is holding the documents, what type of energy do they have relative to the floor?
C. Alex gets tired and drops the documents to the floor. As the stack falls, what type of energy does it possess?
Answer:
1.Work done=100 joules
2.potential energy
3.kinetic energy
Explanation:
W=Force x distance
w= 20 N x 5 M
W = 100 JOULES
What is used in the name of ionic compounds containing a cation with multiple charges to indicate which charge?
(No answers to display)
Answer:
Roman Numerals?
Explanation:
Iron(II), would be iron 2+
iron(III), would be iron 3+
for example.
The south pole of a compass points to the geographic north pole.
true or flase ?
Answer:
true
Explanation:
When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole. ... The earth spins around the geographic poles, but magnetic compasses point to the magnetic poles.
pls what is a friendly relationship
Answer:
A relationship where both members are freindly and supportive towards each other.
Explanation:
Brainliest?
Answer:
i do not know is your are talking about boyfriend and girlfriend relationship of you are talking about friendship i am just going to say both so for a friendship they do not have to like the same thing but if they do that is cool they have to be nice to each other and understand what one of them wants to do and they have to get along if they want to have a goof friendship so for boyfriend and girlfriend it is okay for them to fight and not understand each other they have to be friends so they can no what they like to do with each other then they can go on dates together
Explanation:
hope i help sorry very long
The scientific theories to the law of parsimony?
Answer:
vfx local KFC kid lsd Ltd Ltd KFC
Which is true about density?
A. A possible unit for density is grams.
B. Liquid gold is denser than solid gold.
C. Density is found by multiplying mass
and volume.
D. Density is independent of the
amount of the sample.
Answer:
Density is independent of the
amount of the sample. (D)
Explanation:
Because density is an intrinsic property of matter.
hope it helps!
Answer:
D. Density is independent of the
amount of the sample.
Explanation:
Density is expressed in units of mass per volume, such as g/mL or kg/m3. Because the density of a substance does not depend on the amount of substance present, density is an “intensive property”. To measure the density of a sample of material, both the mass and volume of the sample must be determined.
Hope this Helps, Pls mark as the Brainliest
Sound is a type of mechanical wave and must have a medium through which to travel. Sound will move at different speeds when which of the following occurs?
A. The sound is fully absorbed in an object.
B. The sound moves from air to water.
C. The sound pitch increases.
D. The sound is reflected off a surface.
I need an answer ASAP .....
Why Is total internal reflection important in the use of fiber optics?
Answer:
Hope this helped :
Explanation:
When light passes from a medium with one index of refraction (m1) to another medium with a lower index of refraction (m2), it bends or refracts away from an imaginary line perpendicular to the surface (normal line). As the angle of the beam through m1 becomes greater with respect to the normal line, the refracted light through m2 bends further away from the line.
At one particular angle (critical angle), the refracted light will not go into m2, but instead will travel along the surface between the two media (sine [critical angle] = n2/n1 where n1 and n2 are the indices of refraction [n1 is greater than n2]). If the beam through m1 is greater than the critical angle, then the refracted beam will be reflected entirely back into m1 (total internal reflection), even though m2 may be transparent!
what is mass times acceleration?
Answer:
Force
Explanation:
The mass of an object is the quantity of matter it contains. It is measured in kilograms.
Acceleration is the ratio of the change in the velocity of an object to the change in time. It is measured in m/[tex]s^{2}[/tex].
When the mass of an object is multiplied with its acceleration, this gives the average force applied on the object. As force is defined as agent that can change the state of an object.
i.e F = m × a
where F is the force, m is the mass of the object and a its acceleration.
The two major classes of force are; contact force and field force.
Identify the following equation: H2 - 2H+ + 2e
A. oxidation
B. reduction
C. redox
D. none of the above
Answer:
(A.) H2 --> 2H+ 2 e- (oxidation)
Explanation:
A. oxidation is the removal of electron(s) from a substance. This is the case here, since AFTER the reaction you can see that there were electons "removed" from H2.
H2 --> 2H+ 2 e- (oxidation)
B. reduction is the addition of electron(s) to a substance
1/2 O2 + 2 e- + 2H+ --> H2O (reduction)
By the way:
Biochemical reactions often involve the transfer of complete hydrogen atoms, meaning an electron and a proton.
The substance oxidized (H2) is electron donor.
The substance reduced (O2) is electron acceptor.
Just remember this:
Prior to the reaction, the e donor is always reduced.
Prior to the reaction, the e acceptor is always oxidized.
Match each type ol energy with its description
chemical
electrical
sound
nuclear
mechanical
A type of potential energy stored inside atoms
Boccurs when a vibrating object's kinetic energy moves through matter in waves
C possessed by substances that do work through chemical reactions
D kinetle energy of charged particles called electrons
energy of moving objects
Answer:
B
Explanation: yes
What does ROCAPV mean?
Answer: Rancho de Area Comunes PV
Explanation: it means
Rancho de Area Comunes PV
In an AC Monte Roca PV System Profile, where the following are depicted:
Location
Commissioning
Production
Operator
PV system power
Module
And communication.
After nuclear explosions animals and humans can continue to die due to ingestion of radioactive particles and nuclear ______________.
fallout
rainout
whiteout
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
A pendulum reaches a height of 0.3 m at the top of its swing. If the
bob has a mass of 5 kg, what is the potential energy at the top of its
swing?
Select one:
14.7)
7.35 J
0.45 J
1.5 J
Answer: A
Potential energy = 14.7 J
Explanation:
Given that the
Mass M = 5 kg
Height h = 0.3 m
Let us take acceleration due to gravity g = 9.81 m/s^2
Potential energy = mgh
Substitute all the parameters into the formula above
P.E = 5 × 9.81 × 0.3
P.E = 14.715 J
P.E = 14.7 J approximately
The correct option is therefore A
A force of 310.0 N is used to push a 120 kg mass, 30.0 m horizontally in 3.00 s.
(a) Calculate the work done on the mass.
[ ] × kJ
(b) Calculate the power developed.
[ ] kW
Explanation:
We have,
Force acting on the mass is 310 N
Mass, m = 120 kg
Distance covered by the mass is 30 m
Time, t = 3 s
To find,
(a) Work done (b) power developed
Solution,
(a) The work done on the mass is given by the product of force and displacement such that,
[tex]W=Fd\\\\W=310\times 30\\\\W=9300\ J[/tex]
(b) The rate at which the work is done is called power developed. Its formula is given by :
[tex]P=\dfrac{W}{t}\\\\P=\dfrac{9300}{3}\\\\P=3100\ W[/tex]
Therefore, the work done on the mass is 9300 J and the power developed is 3100 W.
This question is about waves. I need help,thanks. I need full sentences.
What is the focal length of a lens if an object placed 3.28 cm from the lens produces an image that is 4.11 cm in front of the lens?
Answer:
1.82 cm
Explanation:
The relationship between the object distance (p), image distance (q) and focal length (f) is given by [tex]\frac{1}{p}+\frac{1}{q}=\frac{1}{f}[/tex]
According to question,
Object distance (p) = 3.28 cm
Image distance (q) = 4.11 cm
Therefore,
[tex]\frac{1}{3.28}+\frac{1}{4.11}=\frac{1}{f}\\\frac{3.28+4.11}{3.28\times 4.11}=\frac{1}{f}\\f=\frac{3.28\times 4.11}{3.28+4.11}\\=\frac{13.48}{7.39}\\=1.82\,\,cm[/tex]
You name binary ionic compounds by naming the first element or the ___ first,
followed by the name of the second element or ____ with the ending changed to -ide.
NEED ANSWERS ASAP
Answer:
cation, anion
Explanation:
Binary Ionic Compounds- Binary means 2, ionic relates to charges. Therefore binary ionic compounds have TWO elements, with charges that cancel eachother out. The cation (or positive charge) goes before the anion (or negative charge)
example:
NaCl
Na^+1
Cl^-1
Sodium Chloride
What are all the elements of a perfect graph?
Answer:
It states that a graph is perfect if the sizes of the largest clique, and the largest independent set, when multiplied together, equal or exceed the number of vertices of the graph, and the same is true for any induced subgraph
2. The length of time you take to execute an
action is called your *blank*
time.
(a) total stopping (c) braking
(b) perception
(d) reaction
Answer:
Reaction
Explanation:
why is it dangerous to connect a battery to itself. what is the term used to describe that
what was a luxury but is now considered a necessity.
Answer:
a cellphone
Explanation:
pls mark brainliest
Answer:
A car
Explanation:
A Physics question regarding circuits and electricity.
Answer:
The other bulbs would stay lit.
Explanation:
You're just unscrewing one bulb, not turning off the circuit.
The thylacine is an extinct marsupial that once roamed Tasmania and Australia. There are several preserved specimens in existence. Which of the following DNA technologies offers the best chance for bringing back the thylacine?
A) DNA cloning
B) DNA sequencing
C) Gel electrophoresis
D) Selective breeding programs.
Answer:
D
Explanation:
selective breeding programs
