Answer:
A-Top of the Circle
Please mark me branilist
Why is an element considered a pure substance?
im i right
An element is considered a pure substance because it is made up of only one type of atom and cannot be broken down into a simpler form.
Answer:
Explanation:
right
HELP IM IN A EXAM!!!
Which organisms are most closely related?
species A and B
species A and C
species B and C
species C and D
Answer:
answer is b and c
Explanation:
i got it right
Answer:
its C
Explanation:
WILL MARK THE BRAINLIEST
pls help
Answer:
I think B but im not sure
Explanation:
Answer: i think both mirrors are used to reflect the beam of light.
Explanation:
gr 10 science right? im almost done the semester and i learnt this already so i think the best answer is the last one
Four atoms of hydrogen combine with one carbon atom to form CH4, but only two hydrogen atoms combine with one oxygen atom to form H2O. Which of the following helps to explain why?
Hydrogen has one valence electron.
Oxygen has two vacancies in its electron shell, but carbon has four vacancies.
Metallic bonds form between positively charged metal ions and delocalized electrons.
Atoms may share electrons in order to fill their electron shells.
Answer:
Oxygen has two vacancies in its electron shell, but carbon has four vacancies.
Explanation:
Oxygen has vacant space for two electrons in its outermost shell. Hence, it can accommodate two electrons from two hydrogen atoms. This leads to the formation of the H₂O molecule. On the other hand, the Carbon atom has vacant space for four electrons. Hence, it can accommodate four electrons from four hydrogen atoms. This leads to the formation of the CH₄ molecule.
In this way the explanation can be provided by the following statement:
Oxygen has two vacancies in its electron shell, but carbon has four vacancies.
Answer:
-Atoms may share electrons in order to fill their electron shells.
- Hydrogen has one valence electron.
- Oxygen has two vacancies in its electron shell, but carbon has four vacancies.
Explanation:
just did it
Which energy from the choices given is the strongest
Visible Light
Microwaves
UV Light
X-Rays
Answer:
X-Rays
Explanation:
A spring with a spring constant of 34 N/m is stretched 14 m. What is the energy stored in the
spring?
Answer:
Elastic potential energy
Elastic potential energy is stored in the spring. Provided inelastic deformation has not happened, the work done is equal to the elastic potential energy stored.
Explanation:
becuse
Answer:10
Explanation:
3) Circle the right alternative.
i) The process of using a material of low thermal conductivity to prevent heat loss is
called
a) cooling
b) lagging
C absorption
d) contraction
ii) Metals are good conductors of heat because
(a) they are ductile
(b) they contain free protons
(C) they contain loose electrons (d) their atoms can be easily
displaced
iii) On a cool day, a metal feels cold to the touch because
a) metals contain less heat
b) the temperature of the metal is the same as that of the surroundings
c) the temperature of the metal is less than that of the surroundings
d) the metal conducts the heat away from the hand.
Answer:
1) C (I think)
2) C
3) D
Explanation:
I know that 2 and 3 are correct. just not sure about 1
Which of these can be used to find the volume of a juice box?
A: mass divided by volume
B: mass•weight•length
C: mass divided by weight
D: length•width•height
Answer:
Legth * width* height is how u find volume
Explanation:
Two boys, Shrijan having weight 600N and Shrijesh having weight
300N are playing see-saw. If Shrijan is sitting at 2m from fulcrum,
where should Shrijesh sit from fulcrum to balance Shrijan?
Answer:
to be balanced moments should be equal
4m
Explanation:
[tex]fd = fd \\ 600 \times 2 = 300 \times x \\ \frac{600 \times 2}{300} = x \\ 4m[/tex]
Answer:
4m
Explanation:
fd=fd
600×2× x
300
4m ans
compare and contrast the theories about the origin of the universe
Answer:
The best-supported theory of our universe's origin centers on an event known as the big bang. This theory was born of the observation that other galaxies are moving away from our own at great speed in all directions, as if they had all been propelled by an ancient explosive force.
Explanation:
hope this helps tho i don't quite know what you mean
what should be angle between force and displacement to get the maximum work
Answer:
0°
Explanation:
The angle between force and displacement should be 0° in order to get the maximum work done.
Work done = Force x dcosФ°
Ф is the angle between force and displacement
When Ф is zero, the maximum work done is attained
When Ф is 90, the minimum work is done, in fact, work done is 0
A people mover has a velocity of 1 m/s, VF, and is 150 m, XF, long. If a man walks 2 m/s, VI, relative to the people mover, how long will it take him to
reach the opposite end if he walks in the direction that the people mover travels?
Please show the work and steps. The answer is (3.3 s, 15 m/s)
Answer:
t = 3.3 s and V = 15 m/s
Explanation:
Given that,
Distance covered by the car, d = 50 m
Initial speed, u = 5 m/s
Final speed, v = 25 m/s
Firstly we can find the acceleration of the car using third equation of motion. i.e.
[tex]v^2-u^2=2as\\\\a=\dfrac{v^2-u^2}{2d}\\\\a=\dfrac{(25)^2-(5)^2}{2(50)}\\\\a=6\ m/s^2[/tex]
Let t is the time taken by the car to occur this.
[tex]t=\dfrac{v-u}{a}\\\\t=\dfrac{25-5}{6}\\\\t=3.3\ s[/tex]
Let v is the average velocity of the car. It can be calculated as follows :
[tex]V=\dfrac{u+v}{2}\\\\V=\dfrac{25+5}{2}\\\\V=\dfrac{30}{2}\\\\V=15\ m/s[/tex]
So, the time taken by the car to occur this is 3.3 seconds and the average velocity of the car is 15 m/s.
what name
is given
to the work done
per conlomb of charge
passing between two points?
Electric potential difference is named to the work done per coulomb of charge passing between two points.
What is electric potential?An object's electrical potential energy is determined by two factors: the charge the thing carries internally, and the position of the object in relation to other electrically charged objects. The amount of effort required to move an object from one location to another against an electric field determines the strength of the electric potential.
The total potential energy that a unit charge would have if it were positioned everywhere in space is known as electric potential energy.
The energy gained when an object moves against an electric field is known as the electric potential energy. The electric potential is calculated for any charge by dividing the potential energy by the charge.
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The energy generated by the sun travels to Earth as electromagnetic waves of varying lengths. Which statement describes an electromagnetic wave with a long wavelength
Answer: 4(45)
Explanation:
It’s not equal
Answer:
H. It has a low frequency and can travel through a vacuum.
Explanation:
I got it right
Why can a device never be 100% efficient? Explain.
Answer:
No machine is free from the effects of gravity, and even with wonderful lubrication, friction always exists. The energy a machine produces is always less than the energy put into it (energy input). ... That is why 100% efficiency in machines shall not be possible.
Answer:The output work is always less than the input work because some of the input work is used to overcome friction. Therefore, efficiency is always less than 100 percent.
Explanation:
What is the momentum of a 0.255kg apple falling at 16.0 m/s
What factors do Presidents consider when choosing a Supreme Court Justice?
Answer:
Presidents use the same criteria: legal expertise, party affiliation, philosophy, an da sense of the acceptability to the Senate. Define majority opinion, concurring opinion, and dissenting opinion.
Explanation:
Katie rolls a toy car off the end of a table.
A car sits on a tall orange box with a shorter orange box in front if it. A short line from the car leads to line A, which points straight down to the shorter box, line B, which leads down to the shorter box at an angle, line C, which curves down to the shorter box, and line D, which extends past lines A-C and then points straight down to the shorter box.
Which path will the car follow when it leaves the table?
A
B
C
D
Answer:
The correct answer is C.) C
Explanation:
I just did the test on edge and got it right
A car sits on a tall orange box with a shorter orange box in front if it. A short line from the car leads to line, which curves down to the shorter box, and line. Therefore, the correct option is option C.
What is car toy?Many of us do not pause to contemplate the importance of play in the lives of children, whether they are our own or the children of friends and relatives. We just take it for granted that kids spend their free time driving toy trucks about or pretending to be dragons (or both), and although it's amusing (certainly for them and occasionally for us), we don't give it much thought beyond that.
It's a great time to start playing with cars, dump trucks, and other vehicles. Not that they'll need much convincing: boys, in particular, appear to be captivated to anything that includes wheels long before their first birthday. which curves down to the shorter box, and line.
Therefore, the correct option is option C.
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3. Why is a subducting plate boundary considered a type of
convergent plate boundary?
Answer:
✔ convergent
Explanation:
Answer:
B ( Convergent)
Explanation:
What is the mass of a skateboard that is accelerating at 7 m/s when it is pushed with 49N?
Pls
Answer:
m = 7 kg
Explanation:
F = m × a
49 = m × 7
7m = 49
m = 49/7
m = 7 kg
a measure of how far an object has moved from a starting point
A 1232 kg car moving north at 25.6 m/s collides with a 2028 kg car moving north at 17.5 m/s . They stick together. In what direction and at what speed do they move after the collision?
Answer:
I. Angle = 41.7° Northeast.
II. Vr = 7.08m/s
Explanation:
Let the two cars be denoted by A and B
Given the following data;
Mass of car A = 1232 Kg
Velocity of car A = 25.6 m/s
Mass of car B = 2028 Kg
Velocity of car B = 17.5m/s
First of all, we would solve for momentum;
Momentum = mass × velocity
Momentum, M1 = 1232 × 25.6
Momentum, M1 = 31539.2 Kgm/s
Momentum, M2 = 2028 × 17.5
Momentum, M2 = 35490 Kgm/s
Now, let's find the resultant momentum using the Pythagoras theorem;
R² = M1² + M2²
R² = 31539.2² + 35490²
R² = 994721136.6 + 1259540100
R² = 2254261237
Taking the square root of both sides, we have
Resultant momentum, R = 47479.06 Kgm/s
To find the direction;
Angle = tan¯¹(M1/M2)
Angle = tan¯¹(31539.2/35490)
Angle = tan¯¹(0.89)
Angle = 41.7° Northeast.
To find the speed;
R = (M1 + M2)Vr
47479.06 = (31539.2 + 35490)Vr
47479.06 = 67029.2Vr
Vr = 47479.06/67029.2
Vr = 7.08m/s
need help in is psychology
Answer:
D. The General Adaptation Syndrome
Explanation:
Hans Selye, an endocrinologist, developed the "Stress Theory." He showed the relationship of "stress" to the person's development of disease.
Under stress, a person's body experiences changes. The person tries to cope with these through three stages: Alarm Reaction Stage, Resistance Stage and Exhaustion Stage. It is at the last stage that a person's immune system is placed at a huge risk. Once the person is exposed to a stressor for a period of time, he becomes hopeless and his body tends to give up coping. He then succumbs to stress-related illness.
How far does an object travel if it starts from rest and accelerates at a rate of 2.0 meters per second2 for 6.5 seconds?
Answer:
42.25 m
Explanation:
According to the question;
u = 0 m/s (journey started from rest)
a = 2 m/s^2
t = 6.5 secs
Given that;
s = ut + 1/2at^2
s = (0 * 6.5) + 1/2 * 2 * (6.5)^2
s = 0 + 42.25
s = 42.25 m
Any form of stored energy is called ______ energy
what is in the blank
Answer: Potential energy
Explanation:
Any form of stored energy is called potential energy. (option b)
Potential energy can come in various forms. Gravitational potential energy is associated with an object's position concerning the Earth's gravitational field. The higher the object, the more potential energy it possesses. Elastic potential energy is stored in objects like springs or rubber bands when they are compressed or stretched. Chemical potential energy is stored in the bonds between atoms and molecules in substances like food or fuel.
Remember, potential energy is a concept that helps us understand the ability of an object or a system to perform work or change its state based on its position or condition.
Hence the correct option is (b).
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Complete Question:
Any form of stored energy is called ______ energy
a) Solar
b) Potential
c) Wind
10. When a car turns, its front wheels do not turn by the same amount. In order that the car turn around a common point, the wheel on the side to which the car is turning, turns more than the other. Which of these correctly shows the alignment of a car's wheels when it is turning to its right?
Answer:
The front wheels are aligned towards the right.
Explanation:
Wheel alignment is very important. It ensures proper maintenance of the car's wheel. When a car turns around a common point, the wheel on that side to which the car turns, the turning is more than the other.
The wheel alignment consists of adjusting the wheel's angles so as to stay perpendicular to the surface of the road and to ensure proper tract to the tires. It also provides maximum life to the tire. The front wheels are aligned to the right when the car makes a right turn and the wheel leans in towards the center of the car.
2. Which positions of the pendulum would have the most potential energy?
A1 and 2
B2 and 3
C 1 and 5
D 4 and 5
Explanation:
im listening to metallica
turn the page
Please help me with this!!
Answer:
yes it is correct
Explanation:
A voltmeter is used to measure potential energy difference, voltage across a circuit component.
and a voltmeter is always connected in parallel with the circuit component you are measuring.
A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity, so that it ascends straight up with a net acceleration of 1.2 m/s2. How far up does it move?
Answer:
2 m long, how wide is it? SOLUTION. Given: F = 60.0 N. W = 2.05 × 105. J x = 9.60 × 102 m. Unknown: d = ? ... moved? 3. A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity, so that it ascends straight up with a net acceleration of 1.2 m/s. 2 . How far up does it move? 4.
Explanation: hope this helps plz help me with my question
