Answer:
Explanation:
in some reactions we see this as a change in the temperature. ... The study of energy changes (particularly heat) in chemical reactions is known as ... When a chemical reaction occurs, bonds in the reactants break, while new bonds form in the product. ... Physical changes can also be classified as exothermic or endothermic.
convert 450km/h to nm/ps. show procedure :)
Help me please Which of the following statements best describes the atoms and molecules that make up a glass
filled with water?
O The atoms and molecules of the liquid water are moving, while the atoms and molecules of the glass are not
moving.
The atoms and molecules of neither the liquid water nor the glass are moving.
O The atoms and molecules of the liquid water are not moving, while the atoms and molecules of the glass are
moving.
The atoms and molecules of both the liquid water and the glass are moving.
Answer:
The correct option is;
The atoms and molecules of the liquid water are moving, while the atoms and molecules of the glass are not moving
Explanation:
Matter that exist in the liquid or gaseous state consist of molecules that move freely about in the entire containing medium for gas, while the molecules move freely in the portion of the container occupied by the fluid in the case of liquid fluids
However, the molecules of a solid are fixed within the current shape of the solid and are only free to vibrate within a fixed location and the allow the passage of subatomic particles such as electrons
As such, the glass cup being a solid, consists of molecules fixed in space, while the liquid water consists of molecules which can translate within the portion of the volume of the glass filled with the water.
A radio signal takes 1.28 s to travel from a transmitter on the Moon to the surface of Earth. The radio waves travel at 3.00108m/s. What is the distance from the Moon to Earth?
Answer:
s = 3.84 x 10⁸ m
Explanation:
The distance traveled by an object, while in uniform motion, is given by the following equation:
s = vt
where,
s = distance covered
v = speed
t = time interval
In this case:
s = distance between Moon and Earth = ?
v = speed of radio waves = 3 x 10⁸ m/s
t = time taken to travel = 1.28 s
Therefore,
s = (3 x 10⁸ m/s)(1.28 s)
s = 3.84 x 10⁸ m
A girl cycles for 3hrs at a speed of 40km/h.What distance did she travel?
Answer: 120 km
Explanation:
Distance= speed x time
her speed is 40km/hr
and her time was 3 hours
40x 3= 120 km
what is the density of alcohol?t
Answer:
789 kg/m
Explanation:
789 kg/m good luck
Explanation:
The density of alcohol is 800 Kg/m^3 .
The current, 2019, women's world record for the
400-meter run around an oval track is held by Marita Koch, with a time of 47.60
seconds. What was her average velocity during this race?
a) 4.760 m/s
b) 0 m/s
c) 0.1190 m/s
d) 8.403 m/s
Answer: D
8.403 m/s
Explanation:
Given that the women's world record for the 400-meter run around an oval track is held by Marita Koch, with a time of 47.60
seconds.
Her average velocity during this race will be
Velocity = distance/ time
Velocity = 400 / 47.6
Velocity = 8.403 m/s
Therefore, her average velocity during this race will be 8.403 m/s
D is therefore the correct answer.
Help Meeee Please!!!!! This was due so long ago... DO NOT REPORT, THERE IS NO REASON TO REPORT! Assignment: Weathering in Action Exploration
You can see science in action all around you. In this activity, you will observe weathering.
Signs of Weathering| Mechanical or Chemical? Description of location
Flakes of brick -----
Cracks in rocks -----
Lichen growing on rocks------
Roots or plant growth ---------
making cracks in concrete
Worn away statues-------
Exposed rocks ----------
Rust on rocks -----------
Example You Found:
Sketches
Type of weathering:
Sketch:
Type of weathering:
Sketch:
Type of weathering:
Sketch:
I really need help, I don't understand this so please help me.
Below is the document to this it is the exact same as the question.
Answer: Chemical
Explanation: because it is changeing its chemical structure if its wrong sorry .
Answer:
chemical, chemical, chemical, mechanical, chemical, mechanical, chemical. im still trying to figure out the rest!
Explanation:
What is constant velocity in comparison to instantaneous velocity?
Will give Brainliest to the one that shows great effort with a correct answer.
Answer:
Please find the answer in the explanation
Explanation:
Constant velocity is the uniform velocity. That is, the velocity is steady and it does not change. You will have a constant velocity when you maintain a certain velocity for a long time without changing it.
At constant velocity, acceleration is equal to zero.
Instantaneous velocity is the change in distance in a specific direction per specific time. It is a velocity at a certain time. It is not uniform.
Change in instantaneous velocity is equal to acceleration.
Lexy throws a dart with an initial velocity of 25 m/s at an angle of 60° relative to the ground. What is the approximate vertical component of the initial velocity?
0.5 m/s
0.87 m/s
12.5 m/s
21.7 m/s
Answer:
Option D: 21.7 m/s
Explanation:
We are given;
Initial velocity; u = 25 m/s
Launch Angle; θ = 60°
In projectile motion, the component of velocity vertically and horizontally are;
Vertical component; v = u sin θ
Horizontal component; v = u cos θ
Now, we want to find the approximate vertical component of the initial velocity.
Thus;
v = u sin θ
v = 25 sin 60
v = 25 × 0.866
v = 21.65 m/s ≈ 21.7 m/s
I took the test and got 21.7 m/s correct i am glad to help anytime.
If you increase your work and decrease your time, you will haveA. more power.less power.the same amount of power.power rating can not be determined
If you increase your work and decrease your time, you will have A. more power.
Power (P) is the rate at which work is done. In the International System of Units, the unit of power is the Watt, equal to one joule per second. Mathematically, it is equal to work (W) divided by time (t).
[tex]P = \frac{W}{t}[/tex]
If you increase your work, you increase the numerator in the expression above. If you decrease your time, you decrease the denominator in the expression above. They both have the same consequence that is an increase in power, that is, more work done in less time.
If you increase your work and decrease your time, you will have A. more power.
Learn more: https://brainly.com/question/24328975
The distance from the cafeteria to gym is 0.112 kilometers, How many millimeters would it be?
Why might a scientist use a physical model of a plant cell instead of studying
a cell directly?
A. A model can be used for things that are too simple to study
directly
B. A model can be used for things that are too large to study directly.
C. A model can be used for things that are too small to see clearly.
D. A model can be used for things that are too hot to handle easily.
Answer: I think it’s C.
Explanation:
The correct answer is C
Scientific Models are lay down processes or ideas toward achieving a specific goal. It can be mathematical in nature, or conceptual representation.
In most cases, scientific model are employed for complex findings or experiments. In this scenario, the plant cell is complex to study in the sense that the cells can not be seen with our naked eyes.
Therefore, the scientist will use a physical model of a plant cell instead of studying a cell directly because a model can be used for things that are too small to see clearly.
The correct answer is C
Learn more here : https://brainly.com/question/17684997
If the acceleration of a truck over a given time interval is zero, how does the instantaneous velocity of that truck at any instant during that interval compare to its average velocity over that interval.
Answer:
B
Explanation:
The instantaneous velocity of the truck at any instant during the interval Δt will be equal to the average velocity of the truck over the interval Δt.
It is given that If the acceleration of a truck over a given time interval is zero, how does the instantaneous velocity of that truck at any instant during that interval compare to its average velocity over that interval.
What is instantaneous velocity?
The velocity of an object at instant time
The acceleration of the truck is
a=0m/s^2
By using the definition of the linear acceleration, the acceleration of the truck in a time interval
Δt can be expressed as:
a=Δv/Δt
By given a=0
0=Δv/Δt
Δv=0
Therefore, the velocity of the truck at each instant during the time interval Δt will be the same.
To learn more on instantaneous velocity click here: https://brainly.com/question/5662730
#SPJ2
How many minutes are in 240 days?
Answer:
Hi there!
Your answer is;
345,600 mins per 240 days
Explanation:
First, start small
How many minutes are in one hour?
60mins per 1 hr
How many minutes per one day?
60 × 24= 1440
1440 mins per 1 day
How many minutes per 240 days?
1440× 240= 345600
345,600 mins per 240 days
Hope this helps
A truck filled with supplies sets out across the country at 9 A.M. It is traveling at a constant speed of 80.0 km/h. Two hours later, a train starts out from the same location with similar supplies going to the same destination. The train travels at a constant speed of 110 km/h.
Answer:
At 11 AM, the train is a constant speed of 110 km/h. when the truck is 160 ahead. When they meet, it will be 2 PM
Explanation:
At the train's first hour he moved to 110 km. The truck is at 160 km. The second hour includes train at 220 km, with truck at 240. At 2 PM, they are at the same place.
A gas has a pressure of 0.470 atm at 60.0°C. What is the pressure at standard temperature? Round your answer to the nearest thousandth
Answer:
P2=0.385atmExplanation:
step one:
Given that the temperature T1= 60 Celcius
we can convert this to kelvin by adding 273k to 60 Celcius
we have T1= 333k
pressure P1= 0.470 atm
step two:
we know that the standard temperature is T2= 273K
Applying the temperature and pressure relationship we have
P1/T1=P2/T2
substituting our given data we have
0.47/333=P2/273
cross multiply we have
P2= (0.47*273)/333
P2= 128.31/333
P2=0.385 atm
How is NASA a catalyst to make the crew work better?
Answer:
with teamwork
Explanation:
you need to use team work so the right answer is C
when will an object dropped from rest attain a speed of 30 m/s?
Initial velocity = zero (i.e., free fall)
Final velocity = 30m/s
Acceleration due to gravity = 10m/s²
For a body falling freely under the action of gravity, g is taken positive[tex].[/tex]
◈ First equation of kinenatics :
⇒ v = u + gt
⇒ 30 = 0 + 10t
⇒ t = 30/10
⇒ t = 3s
Hence, object will attain a speed of 30m/s after 3s.
Convert 66.2 mi/h to m/s. 1 mi = 1609 m.
Answer in units of m/s.
Answer:
Explanation:
66.2mi/h to m/s
[tex]\frac{1609m}{1mi}[/tex]×[tex]\frac{66.2mi}{1h}[/tex]×[tex]\frac{1h}{60min}[/tex]×[tex]\frac{1min}{60s}[/tex]
mi will go with mih with h min with minm/s is left[tex]\frac{1609*66.2}{60*60}[/tex]= 29.58772222
Pls make sure of the way of solving to be sure...
Look at the picture can someone pls help me By the way this class his career exploration’s
Answer:m
Ramiro: Technology
Bradford: Education
Dinah: Agriculture
Zella: Architecture
Percy: Business
Explanation:
A hockey puck has a momentum of 3.8 kg•m/s [E]. If its
speed is 24 m/s what is the mass of the puck ? Express
your answer in scientific notation (a.bc x 10-0 kg)
Answer:
[tex]1.6 \times 10 { }^{ - 1} kg \\ [/tex]
Explanation:
I hope, it helped you.
What is the displacement of the iguana between 0s and 5s?
Answer: the displacement is 8m and the distance traveled is also 8 meters
Explanation:
It travels from -2 to 6, a difference of positive 8, and since that was its initial starting point, displacement is 8m, distance traveled also happens to be 8m
Answer:
8 and 8 (No decimals needed) See attached! :)
Explanation:
What is measured by the amount of time a muscle group can sustain a contraction? A. Muscular endurance B. Muscular strength C. Cardiovascular fitness. D. All of the above
Answer:
A. Muscular endurance
Explanation:
Muscular endurance is measured by the amount of time a muscle group can sustain a contraction.
Answer: muscular endurance
Explanation:
i did the test
The number line shows the starting and ending velocities for ball 1. What’s the change in velocity of ball 1? Calculate the value mathematically, and check it using the number line.
Answer:
The starting velocity for ball 1 is 1.00 meter/second. Its ending velocity is 0.25 meter/second.
The change in velocity for ball 1 is 0.25 – 1.00 = -0.75 meter/seconds
Answer:
The starting velocity for ball 1 is 1.00 meter/second. Its ending velocity is -0.50 meter/second.
The change in velocity for ball 1 is -0.50 – 1.00 = -1.50 meters/second.
Explanation:
yee hope it helps
2. a) Force affects the body and results in different changes. The grid given below
has the words related to the effects of force. Find those words.
a) Force could be a push or a pull.
b) A force arises due to the interaction between two objects.
c) Force has magnitude as well as direction.
d) A change in the speed of an object or the direction of its motion or both implies a change in its state of motion.
e) Force acting on an object may cause a change in its state of motion or a change in its shape.
f) A force can act on an object with or without being in contact with it.
Answer:
Please find the answer in the explanation
Explanation:
Given that Force affects the body and results in different changes.
The grid that has the words related to the effects of force are :
a) Force could be a push or a pull.
c) Force has magnitude as well as direction.
e) Force acting on an object may cause a change in its state of motion or a change in its shape.
f) A force can act on an object with or without being in contact with it.
what is the meaning of the state the problem ?
Answer:
A problem statement is a concise description of an issue to be addressed or a condition to be improved upon. It identifies the gap between the current (problem) state and desired (goal) state of a process or product.
Explanation:
Which of these scientists had the greatest contribution to early microscopy?
A.)They all made discoveries using optical telescopes.
B.)They invented optical microscopes and telescopes so they could make discoveries.
C.)They all made discoveries based using instruments that optical technology.
D.)They all made discoveries using optical microscopes.
Answer:
b
Explanation:
I think im not really sure tho
Answer: A
Explanation:
The greatest contribution in early microscopy came from Antonie van Leeuwenhoek of Holland. In 1676, Van Leeuwenhoek, he used his handcrafted microscope that was able to magnify up to 270 times.
Which of the following is a scalar quantity?
Answer:
C. 100 ft/min
Explanation:
A scalar quantity has no direction.
A scalar with direction is called a vector.
Answer:
C. 100ft/min
Explanation:
A scalar quantity is a quantity that has a magnitude but no direction, a vector quantity is a quantity that has both a magnitude and a direction. The other three answers are vectors quantities while C. is a scalar.
Shanai drove 40 miles to the west, then turned around and drove 70 miles to the east. Draw vectors that show each segment of her trip and the resultant displacement vector. Find her resultant displacement.
The conversion of solar energy into electricity accurs when electromagnetic waves strike photovoltaic cells (PV). The photons of the
electromagnetic waves produce electricity by doing what in this process?
Answer:
sunlight
Explanation:
Answer:
Solar-powered photovoltaic (PV) panels convert the sun's rays into electricity by exciting electrons in silicon cells using the photons of light from the sun. This electricity can then be used to supply renewable energy to your home or business.
Explanation:
photovoltaic cell
A photovoltaic cell, commonly called a solar cell or PV, is the technology used to convert solar energy directly into electrical power. A photovoltaic cell is a nonmechanical device usually made from silicon alloys.
