Answer:
x = 45 [m]
Explanation:
To solve this problem we must use the following kinematics equation:
[tex]v_{f}^{2} = v_{i}^{2}-(2*a*x)[/tex]
where:
Vf = final velocity = 0
Vi = initial velocity = 15 [m/s]
a = desacceleration = 2.5 [m/s^2]
x = distance [m]
Note: the negative sign in the equation above, is because the car slows down.
0^2 = 15^2 - (2*2.5*x)
2*2.5*x = 15^2
x = 45 [m]
Calculate the momentum when a toy car of mass 140g moves at 5m/s
Answer:
MOMENTUM= FORCE*MASS
= 140*5
= 700 kg⋅m/s
Light is coming from the left; which is a concave mirror? flat rectangle from the end half circle crescent crescent flipped.
Half circle crescent shape represents the shape of concave mirror which is also known as converging mirror.
What is concave mirror?A concave mirror which also called converging mirror, has a reflecting surface that goes inward. Concave mirrors are used to focus light so we can conclude that Half circle crescent shape represents the shape of concave mirror and also known as converging mirror.
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Answer:
the answer is C
Explanation:
just got it right hope this helps! :D
During photosynthesis, plants transform the energy in sunlight into chemical
energy by converting molecules of carbon dioxide and water into sugar and
oxygen molecules. A scientist wants to share what she has learned about this
process. What are two reasons the scientist might use models to help
represent her findings?
A. The process is very complex.
B. Scientists need to replicate her experiments.
C. The molecules are too small to show the actual molecules in her
report.
D. Photosynthesis cannot be carried out in a laboratory
B and D
Explanation:
The scientists need to replicate her experiment and to do that you need actual sunlight,it can't be carried out in a laboratory
Hope this helped
what are the two properties of a vector?
Answer:
magnitude and direction
what is the difference between sky and space?
Answer:
The sky is the region in which sunlight is scattered in the Earth's atmosphere,
while space is everything beyond that.
which of the following statements is/ are true?
Answer:
2
Explanation:
because if both of them collided they have the same momentum
please answer fully explained. don't answer for points. will mark brainlist
lighting discharge, b: stay away from tall things, and stay away from any items that conduct electricity
how do you balance
___Ca + __O2 → ___CaO
Answer:
2Ca+ O2 ------> 2CaO
mark me as brainiest
When conducting this experiment, some procedures call for heating the substance several
times and recording the mass after each heating, continuing until the mass values are
constant. Explain the purpose of this process and how it might reduce errors.
Answer:
when completing a science experiment it is important to run multiple tests do as to reduce the risk of any outliers of false results
The purpose of this process is to reduce the risk of having outliers of false results
Although the experiment you are referring to in your question is missing the general principle when conducting an experiment is the running of multiple tests before coming up with an actual test result.
Therefore when completing a science experiment it is important to run multiple tests like heating the substance several times until a constant mass value is obtained, in other to ascertain the results. the reason why such process is undertaken is to reduce the risk of having outliers of false results. Also
A scientific experiment involves several procedures and this depends on the type and purpose of the experiment.
for example: An experiment with the purpose of determining how the mass of an object reacts to heat will require the mass of the object to be recorded after heating the object/substance several times.
Hence we can conclude that the purpose of the process is to reduce the risk of having outliers of false results.
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What happens when a light wave is refracted? Question 1 options: The waves spread out. The wave changes direction. The wave is scattered. The wave changes frequency.
When light wave is refracted, the wave changes direction.
What is Wave Refraction?Refraction of waves refer to the process that result in a change in waves direction as the wave is transmitted from one medium to another. Refraction of wave can be the process of bending of the path of the waves which is caused by a change in speed and wavelength of the waves.
Therefore, When light wave is refracted, the wave changes direction.
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When a 200g block is placed on the piston, the volume of the gas goes from 5×10−5m3 to 4.7×10−5m3, while the pressure goes from 5.4×104Pa to 5.7×104Pa . If the surface area of the piston is 1×10−3m2 , the energy transferred to the gas due to the compression is most nearly
Answer:
The energy transferred to the gas is 9 mJ
Explanation:
Given;
initial volume of the gas, v₁ = 5 x 10⁻⁵ m³
final volume of the gas, v₂ = 4.7 x 10⁻⁵ m³
initial pressure of the gas, P₁ = 5.4 x 10⁴ Pa
final pressure of the gas, P₂ = 5.7 x 10⁴ Pa
The work done in compressing the gas is given by;
W = ΔPV = (P₂ - P₁)(V₂ - V₁)
W = (5.7 x 10⁴ Pa - 5.4 x 10⁴ Pa)(4.7 x 10⁻⁵ m³ - 5 x 10⁻⁵ m³)
W = (3000)( -3 x 10⁻⁶)
W = - 9 x 10⁻³ J
W = -9 mJ
Thus, the work done in compressing this gas is equal to the energy transferred to the gas = 9 mJ
CAN ANYONE PLS WRITE A POEM ABOUT NEON!!!!!!!!
Colors so bright
They catch your eye
You can see them from miles away
They shine in the night
Such beauty from dye
Oh so many ways they can array
litterly just got this off the top of my head. it was fun making.
A cell phone uses a 3. 0 V battery. The circuit board it uses needs a 0. 05 A current. What size resistor is needed to generate this current? Ω.
The value of resistance will be 60 ohms. Resistance is the opposition force offered to the flow of electric current. The ratio of the voltage to the electric current passing through the wire.
What is a resistor?A resistor is a two-terminal passive electrical component that acts as a circuit element by implementing electrical resistance.
Resistors are used to limit current flow, alter signal levels, divide voltages, bias active devices, and complete transmission lines in electronic circuits.
The given data in the problem is;
V is the voltage = 3. 0 V
I is value of electric current= 0. 05 A
R is the resistance=?
According to ohm's law, the potential difference between the two ends of the conductor is equal to the product of electric current and the resistance generated.
So from the ohm law;
V= IR
[tex]\rm R = \frac{V}{I} \\\\ \rm R = \frac{3}{0.05} \\\\ \rm R =60 \ ohm[/tex]
Hence the value of resistance will be 60 ohms.
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How can a machine be made more efficient?
Answer:
Because all machines lose input work to friction, one way to improve the efficiency of a machine is by reducing friction. Hope this helped :))
Explanation:
How much work is required to lift a 35-kg object from the ground 3.0-m into the air?
Also; How much Gravitational Potential Energy did the object gain?
The amount of work required to lift the object is 1029 J. And the amount of potential energy gained by the object is 1029 J.
What is work?Work can be defined as the product of force and distance. The s.i unit of work is Joules (J).
To calculate the amount of work required to lift the object, we use the formula below.
Formula:
W = mgh........... Equation 1Where:
P.E = work required to lift the objectm = mass of the objecth = height of the objectg = acceleration due to gravityFrom the question,
Given:
m = 35 kgh = 3 mg = 9.8 m/s²Substitute these values into equation 1
W = 35×3×9.8W = 1029 J.The amount of gravitational potential energy gained by the object is the same s the amount of work required to lift the object
Therefore,
P.E = W = 1029 JHence, The amount of work required to lift the object is 1029 J. And the amount of potential energy gained by the object is 1029 J.
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Which tools would Sara use to find an irregularly shaped object’s mass and volume?
a meter stick, a ruler, and water
a meter stick, a balance, and water
a balance, water, and a ruler
a balance, water, and a beaker
Answer:
D. a balance, water, and a beaker
Hope this helps!
Answer:
Explanation:
D. a balance, water, and a beaker
A mountain climber has a mass (with all of their equipment) of 95, point, 0, k, g,95.0kg. If they were perfectly efficient, and ate 500, g,500g of chocolate (providing 11, point, 1, M, J,11.1MJ of chemical energy), how high could they climb?
Answer:
11900 meters
Explanation:
Use the Potential energy = mgh formula, substituting these in to get 11.1x10^6 = 95 x 9.81 x h.
Rearrange to make h the subject and the answer given is 11900 (3sig.fig.)
The maximum height to which he can climb will be 1.168 x 10⁴ meters.
What is potential energy?
The potential energy of a body is the energy of the body due it position. The potential energy always exist for two bodies which are in mutual interaction with each other for example by a force. For body a on earth, the potential energy of the body - earth system is -
E[P] = mgh
Given is a mountain climber that has a mass of 95 kg.
We can write -
Mass of climber = [M] = 95 kg
Energy gained by eating the chocolate = [E] = 11.1 MJ = 1.11 x 10⁷ joules
Assume that the height achieved achieve by the climber is [h] meters
Therefore, the potential energy gained at that height will be equal to 11 MJ
Therefore -
mgh = 1.11 x 10⁷
95 x 10 x h = 1.11 x 10⁷
95 x 10 x h = 1110 x 10⁴
h = (1110 x 10⁴)/950
h = 1.168 x 10⁴ meters
Therefore, the maximum height to which he can climb will be 1.168 x 10⁴ meters.
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#SPJ2
Which of the following objects is in static equilibrium?
A. An apple falling from a tree
B. A car moving at a constant velocity
C. A motorcycle speeding up
D. A bicycle sitting on the ground
[tex]\longrightarrow \textsf{D. A bicycle sitting on the ground} [/tex]
Solution:-Let us check all options -
A) An apple falling from a tree is under the influence of gravity. Thus some force is acting on the apple and it can not said to be in state of equilibrium. B) A car moving at a constant velocity may said to be in state of equilibrium but the since the car is in motion ,equilibrium is dynamic in nature .Thus , it is not in static equilibrium.C) A motorcycle speeding up has some acceleration due to some forces. Thus it can also not be said in state of static equilibrium.D) Since the force acting on bicycle sitting down in zero as well as it is in state of rest , thus bicycle sitting on the ground may said to be in static equilibrium.How do biological and environmental factors affect behavior?
Answer:
biological: they can affect our train of thought and how we do or react to things. (Biological factors that influence human behavior can consist of our drive to be warm, fed, sheltered, have companionship (with some humans having stronger biological drives to reproduce), and be free from harm and oppression.)
environmental: the environment can influence mood. (The environment can facilitate or discourage interactions among people and the subsequent benefits of social support)
Explanation:
hope this helps
have an awesome day -TJ
if this helps pls give brainliest :)
Is it possible for only one type of force to be present in a setup? How?
Yes, unless its not a main source.
there are 11 steps one should follow when shooting
true or false
(Archery)
Answer:
true
Explanation:
1. Stance
2. Nock
3. Set Draw Hand
4. Set Bow Hand
5. Pre-Draw
6. Draw
7. Anchor
8. Aim
9. Shot Set Up
10. Release
11. Follow-Through & Reflect
Want in own words please
What determines whether something is solid or liquid or gas
Answer:
An object could be determined as solid:
-It doesn't change shape easily.
-when lots of heat applied till melting point, it would melt or thaw (basically turn into liquid).
-turn to pieces or bent when enough force applied to it.
-the molecules attached with each other by strong forces, creating strong bonds.
An object could be determined as liquid:
-It changes shaped based on the container.
-when lots of heat applied till boiling point, it would vaporize
-the molecules have weak bonds, creating a lot of spaces.
-when heat extracted from the liquid till freezing point, it would freeze/hardened (turn into solid)
An object could be determined as gas:
-it doesn't have any shape or form.
-if fills in the container.
-if lots of heat applied, its molecules are going to move, vibrate,and transist faster; increasing pressure and volume.
-The molecules have very weak bonds, creating spacious space.
-when the heat are being extracted till certain freezing point, it is going to turn into liquid, then solid.
1.1
Which of the following pairs can be classified as vectors?
A. Friction and mass
B. Mass and inertia
C. Inertia and weight
D. Weight and friction
Answer:
C
Explanation:
vectors are any quantities that have both magnitude and direction
therefore both inertia and weight are both vectors
Physics. 40 points.
Help please :) (View attached image)
Answer:
1) 10 m/s 2) 14.1 m/s 3) 6.7 m 4) 11.25 m 5) 4.5 m/s 6) 12 joules
Explanation:
Which element is a noble gas?
Answer:
Elements that are noble gases are helium, argon, xenon, krypton, neon and radon.
Need help with the second one!
This question is based on the movie “Interstellar”
Nah we don't need a new planet
Explanation:
will can still manage our planet
Mars has two moons that are most similar in character to ________. Earth's Moon comets small asteroids particles in the rings of Saturn
Answer:
Small asteroids
Explanation:
Mars has 2 moons, Phobos and Deimos, that each have characteristics similar to small asteroids.
a;most done i know im asking a lot of qeastions
Answer:
I cannot see the choices for no. 10, so I'll answer no. 8 and no. 9.
8. a. keep the Earth from tilting on its axis
9. c. an Earth-centered to a sun-centered model
Explanation:
8. The tilting of the Earth on its axis (23.5 degrees) is greatly related to the weather/seasons in different countries. It also affects the amount of daylight that a specific area receives. Keeping the Earth from tilting on its axis would allow your area to receive the same length of sunlight because not tilting at all leads to fewer number of variations.
9. The Earth was thought to be the center of the universe in accordance to the Ptolemaic system. However, this changed through "Heliocentrism," which states that the "sun" is the center of the solar system.
!!AYO I NEED HELP, YOU WILL GET 100 POINTS :)
In everyday language, the term acceleration is used to describe something that is speeding up, while deceleration is used to describe something that is slowing down. In physics, the word deceleration is not used at all. Instead, physicists talk about positive and negative acceleration. To understand this better, think about an object that is slowing down continuously until it stops, and then it starts to speed up and go backwards. The object is involved in one continuous process, so it does not make sense to use two different and opposite terms (acceleration and deceleration) to describe the same process. Acceleration is simply a vector quantity that involves a magnitude and a direction. Post a few short scenarios involving motion, in which you describe what is happening in everyday terms, including deceleration. Examine the postings of your classmates. Try to describe their scenarios using the scientific concepts of positive and negative acceleration. Examine the attempts of your classmates to describe motion scenarios using negative acceleration. Do you think they correctly describe the motion in the scenarios? Suggest any improvements that are necessary to make the descriptions correct
An example of acceleration is someone that's riding a carousel and a skydiver that's in free fall and deceleration is when one presses the brake while driving.
What is acceleration?It should be noted that acceleration simply means the rate at which velocity changes with time.
In this case, an example of acceleration is someone that's riding a carousel and a skydiver that's in free fall and deceleration is when one presses the brake while driving. Acceleration can also be the fall of an apple from the tree.
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When energy is added to a wave, how can the wave change?.
Answer:
When energy is added to a wave How can the wave change? The energy transported by a wave is directly proportional to the square of the amplitude. So whatever change occurs in the amplitude, the square of that effect impacts the energy.
Explanation: