Answer: 9.36 is correct on acellus
Explanation:
Answer:
9.36
Explanation:
POSSIBLE 1. Which of the following are examples of a physical reactions: (1) ice melting, (2) pencil breaking, (3) iron rusting, (4) wood burning? a. 1.4 b. 3,4 c. 2.3 d. 1,2
Answer:
D) 1 & 2
Explanation:
Ice melting can be refrozen and although the pencil breaks, it doesn't change the chemical formula of the pencil
1. Peter throws four stones having the same weight on four different surfaces. The surfaces aee icy, sandy, dry and cemented. He throws the stones with the dame force. On whoch of the given surfaces will the stone go to the maximum speed before it stops?
2. ____ is the body shape which offers very little resistance to the flow of air.
3. Spring balance is a device used for measuring the ______ of an object
Answer:
1. Icy
This is so because the icy surface will be slippery due to ice and water residue on it. Not only the stone, anything that goes on the icy surface is likely to slip. There won't be much friction offered by the surface.
If we talk about the sandy surface, the stone won't go far and will be stopped at the nearest point possible and it's also possible that the stone will settle down in the surface.
The dry and cemented surfaces will cause friction when the stone will be thrown on them, which will stop the stone from going far away.
2. Streamline is the body shape which offers very little resistance to the flow of air.
3. Spring balance is a device used for measuring weight of an object object.
(or the force acting on an object)
when a wave travels through a medium, the wave transfers
1. mass, only
2. energy, only
3. both mass and energy
4. neither mass nor energy
Answer: 2
Explanation: waves transfer energy without transferring mass
When a wave travels through a medium, the wave transfers: 2. energy, only.
What is a wave?A wave can be defined as a disturbance in a medium that progressively transfers (transports) energy from a source to another location, especially without the transportation of mass (matter).
Generally, the energy of a wave is directly proportional to the square of wave amplitude and the square of its frequency. Thus, a wave transfers only energy without mass when it travels through a medium.
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True or False: While steroids are not allowed in chicken production, selective breeding has caused chickens to grow very large, very quickly.
1. True
2. False
Answer:
True.
Explanation:
In biology, selective breeding is the mechanism by which certain traits or a combination of traits are consciously selected in animal breeding or plant breeding and cultivation. Artificial selection is seen as a counterpart to natural selection, the mechanism by which, in nature, individuals are selected who are better adapted to their natural environment. Both processes have the same genetic principles and background. Man selects the individuals with the desired traits to produce progeny, making these traits more and more common.
Three 18-ohm resistors are connected in series with an ideal 12-volt battery. What is the equivalent resistance of the circuit?
Answer:
RT = 54 Ohms
Explanation:
Given the following data;
Resistance = 18 Ohms
Voltage = 12 Volts
To find the equivalent resistance (RT) of the circuit;
For a series connection, the formula is;
RT = R1 + R2 + R3
RT = 18 + 18 + 18
RT = 54 Ohms
Or
RT = 3*R
RT = 3 * 18
RT = 54 Ohms
Which position has the least amount of kinetic energy?
the position that has least kinetic energy is option D
A sound wave enters a new medium where sound travels faster. How does this affect the frequency and wavelength of the sound?
OA. The frequency Increases and the wavelength decreases.
OB. The frequency decreases and the wavelength increases.
OC. The frequency stays the same and the wavelength increases.
OD. The frequency stays the same and the wavelength decreases.
ОЕ. Neither the frequency nor the wavelength is affected.
The frequency stays the same and the wavelength increases.
Explanation;
Sound waves are a type of mechanical wave which requires a material medium for transmission. The transmission of such waves occurs as a result of vibration of particles in the material medium. The faster the vibration of the particles the higher the speed of the sound waves.
When a sound enters a new medium where the sound travels faster, it means the vibration of particles is high, and the wavelength of the waves increases which means the speed of the wave has increased. The frequency on the other hand will remain constant.
Answer:
A. The frequency stays the same and the wavelength decreases
Explanation:(Plato)
10-10x10+10 ..............
Answer:
10-10x10+10=10-100+10=20-100=-80
Answer:
10 is the answer
Explanation:
10-10=0x10=0+10=10
calculate the heat required to change 2.0kg of ice at 0°C to water at 0°C
Answer:
160000 calories or 669440 Joules
Explanation:
Using the formula as follows;
Q = L × m
Where;
Q = amount of heat (J)
L = specific latent heat
m = mass (g)
* Latent heat (L) required for melting of ice is 80 calories/grams.
* Mass of ice in grams = 2kg × 1000 = 2000g.
Hence, Q = 80 × 2000
= 160000 Calories
1 calorie = 4.184J
160000 calorie = 160000 × 4.184
= 669440J
What is a disadvantage of using nuclear power to produce electricity?
Answer:
The further implementations of nuclear power are limited because although nuclear energy does not produce CO2 the way fossil fuels do, there is still a toxic byproduct produced from uranium-fueled nuclear cycles: radioactive fission waste.
Explanation:
Answer:
Disadvantages of Nuclear Power
The further implementations of nuclear power are limited because although nuclear energy does not produce CO2 the way fossil fuels do, there is still a toxic byproduct produced from uranium-fueled nuclear cycles: radioactive fission waste.
Explanation:
4. Why are cells important?
Answer:
Cells provide structure for the body, take in nutrients from food and carry out important functions. ... These organelles carry out tasks such as making proteins?, processing chemicals and generating energy for the cell.
Explanation:
Cells are the basic structures of all living organisms.
HELP ME SHIFT TO MHA PLEASE, (I have aphantasia, so I cant visualize ) But I want to shift, so please help me :(
Answer:
1 + 3 = 7. X = 2 -9+7=8
Explanation:
Here,
Light sources create rays of light. These rays leave the source and travel in a
line until they hit a surface.
A.
broken
В.
straight
C.
curved
D.
bent
Answer:
C. curved
Explanation:
researchers have shown that light can also travel in a curve, without any external influence
Describe the tide requirements necessary to create a tidal power plant.
Answer:
La energía mareomotriz se produce gracias al movimiento generado por las mareas, esta energía es aprovechada por turbinas, las cuales a su vez mueven la mecánica de un alternador que genera energía eléctrica, finalmente este último esta conectado con una central en tierra que distribuye la energía hacia la comunidad.
Which statement explains how planets move in orbit as supported by Newton’s first law of motion?
Planets can change the direction of their own orbital path.
Planets can change orbits due to their inertia.
Planets in motion will have a constant speed unless acted on by an outside force.
Planets with a greater mass will orbit more quickly than smaller planets.
Answer:
C
Explanation:
When the planet in motion should have the same speed so until it should be acted by an outer force. This statement explained the movement of the planets.
The information regarding the first law of motion is as follows:
In the case when the body is at rest or moves at the same speed on the straight line so it should be the same at rest or a movement until it is acted by an outside force. It is also called as law of inertia.Therefore, the third option is correct.
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What process is represented by this redox equation ? 6H 2 O+6CO 2 C 6 H 12 O 6 +6O 2
Answer:
C. Photosynthesis
Explanation:
The redox reaction given in this question is given as follows:
6H2O + 6CO2 → C6H12O6 + 6O2
In this reaction, water (H2O) reacts with carbon dioxide (CO2) to form glucose (C6H12O6) and oxygen (O2). This is the general equation for PHOTOSYNTHESIS process, which is the process whereby plants manufacture their food (sugar) by combining water and carbon dioxide.
In the equation above, water is oxidized into oxygen, while carbon dioxide is reduced into glucose. This makes it an oxidation-reduction (redox) reaction.
There is no air resistance on the moon, so when Neil Armstrong dropped a
hammer all of the potential energy turned into kinetic energy. If Neil was 12
feet tall instead of 6 feet, would the hammer be moving faster or slower
just before hitting the ground? Why?
Answer: faster
Explanation:
Given
hammer is dropped from a height of 12 ft on the surface of the moon
Here, the potential energy is converted into kinetic energy
[tex]\Rightarrow mgh=\dfrac{1}{2}mv^2\\\\\Rightarrow v=\sqrt{2gh}[/tex]
That is velocity is a function of the square root of height. The more the height, greater is the velocity.
So, the hammer hits the ground faster .
use the kinetic theory of matter to explain thermal expansion in liquids
what would be the final temperature of a mixture of water at 40 degree celsius temperature and 60 grams of water at 80 degree celsius temperature
Answer:
T = 60°C
Explanation:
We are given;
Mass of water in both cases as 60g.
Thus; m1 = m2 = 60 g
Temperature of first water; T1 = 40°C
Temperature of 2nd water; T2 = 80°C
Let final temperature be T.
To solve for the final temperature, we will use the formula;
(m1 + m2)T = ((m1•T1) + (m2•T2))
(60 + 60)T = ((60 × 40) + (60 × 80))
120T = 7200
T = 7200/120
T = 60°C
Did the strongman pull up or push down to lift the pig
Answer:
pull up???????????????
Charlotte is driving at 57.4 mi/h and receives a text message. She looks down at her phone and takes her eyes off the road for 4.96 s. How far has Charlotte traveled in feet during this time
Answer:
418.18 feet
Explanation:
Applying,
v = d/t.................. Equation 1
Where v = velocity, d = distance, t = time.
make d the subeject of the equation
d = vt............ Equation 2
From the question,
Given: v = 57.4 mi/h, t = 4.96 s = (4.96/3600) h = 1.38×10⁻³ h
Substitute these values into equation 2
d = (57.4×1.38×10⁻³)
d = 0.0792 mi
Converting from miles to feet
d = (0.0792×5280) feet
d = 418.18 feet
If the Angle of Incidence is 14º, what is the Angle of Reflection?
Answer:
Explanation:
The Law of reflection states that angle of incidence equals angle of reflection.
So Angle of reflection is 14° also.
on what factors, current sensitivity voltage sensitivity of
a galvanometer depend?
[tex]\boxed{\underline{\bf \: ANSWER}}[/tex]
The current sensitivity of a galvanometer depends upon the following factors :-
number of turns.coil area.restoring force per unit twist.magnetic field.___________
Hope it helps.
RainbowSalt2222
please dont waste my time with those 'answer is in the file"
The force exerted by water and air on the skier is 50 Newtons (N) to the left. The force exerted by the boat on the skier is 40 Newtons (N) to the right. How will the unbalanced forces change the motion of the skier
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the concept of Net force on a body.
We know that net force on a body is the force that is calculated from all direction and added , if there is any force remained at last, then the forces are unbalanced,
and if the net force on a body is Zero, then it is a balanced force,
here,
Force to left on skier = 50 N
Force to right on skier = 40 N
hence the net force = left force - right force
Net force = 50 - 40 ==> 10 N
hence the Net force is 10 N in the left direction of the skier.
8. Gravity pulls a skydiver down as air
friction (drag) pushes the skydiver up. Is
this an action-reaction pair?
Answer:
Air resistance is pushing up on the parachute and force of gravity is pulling down so she slows down. This increases friction which slows free fall down. So when the skydiver reaches terminal velocity, the force of gravity is balance by air resistance. But when the forces are balance, there is no acceleration.
An object is 10.0 cm from a plane mirror. The object is 5.00 cm tall.
a. What is the image position?
Answer:
...............
Explanation:
If an object is placed in front of a plane mirror, the size of the object remains same. This is the property of plane mirror. So the height of the object will be 10cm only.
The image position in the plane mirror is 5 cm.
What is meant by magnification ?The ratio of the height of the formed image to the height of the object is used to define the magnification created by the mirror.
Here,
Position of the object, u = -10 cm
Height of the object, h = 10 cm
We know that magnification produced by a plane mirror is 1.
So,
Magnification, m = -v/u
1 = -v/u
Therefore, image distance,
v = -u
v = 5 cm
Hence,
The image position in the plane mirror is 5 cm.
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The half life of a radioactive element is 8 hours. A sample of the element is tested and found to contain 6g of the element. How much of the element was present 32 hours before the element was tested? 0.375g 6g 48g 96g
Answer:
m₀ = 96 g
Explanation:
First, we will calculate the no. of half-lives passed:
[tex]n = \frac{T}{T_{1/2}}[/tex]
where,
n = no. of half-lives passed = ?
T = Total time elapsed = 32 h
[tex]T_{1/2}[/tex] = Half-Life = 8 h
Therefore,
[tex]n = \frac{32\ h}{8\ h}\\\\n = 4[/tex]
Now, for the initial amount of element:
[tex]m = \frac{m_o}{2^n}\\\\m_o = m(2^n)[/tex]
where,
m₀ = initial amount of element = ?
m = current amount of element = 6 g
Therefore,
[tex]m_o = (6\ g)(2^4)[/tex]
m₀ = (6 g)(16)
m₀ = 96 g
PLEASE HELP WILL GIVE BRAINLIEST
How can diversity within an ecosystem be compromised?
A.)by building structures on natural habitat areas
B.)by regulating human activity within an ecosystem
C.)by helping to maintain habitats that have been disturbed
D.)by leaving the ecosystem alone to fend for itself
Kelli has a mass of 42-kg, and she is sitting on a playground swing that hangs .4m above the ground. Her mom pulls the swing back and releases it when the seat is 1 meter above the ground. How fast is Kelli moving when the swing passes through its lowest point?
Answer:
3.4 m/s
Explanation:
may i be marked brainliest?
E(P)=m*g*h
=42*10*1
=420 J
E(P)=E(K)
E(K)=1/2MV^2
420=½*42*V^2
V^2=20
V=4.47
What is velocity ?"Velocity is essentially a vector quantity. It is the rate of change of distance. It is the rate of change of displacement. Speed of an object moving can never be negative. The velocity of a moving object can be zero. "
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Which kind of wave is generated by a plucked guitar string as the molecules
of air around it begin to vibrate?
O A. Transverse
O B. Surface
O C. Electromagnetic
O D. Longitudinal
PLEASE HELP
Answer:
longitudinal
Explanation: