A physical change is a change affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.
How can you decrease the amount of energy an object has?
Answer: Hello There!...............
You decrease the kinetic energy by either stopping the object and let it rest (which would give it potential energy) or changeing the slope.
Explanation:
Mark me brainest please. Hope this helps. Anna ♥
Depending on the sort of energy involved, you can use a variety of techniques to reduce the quantity of energy an object contains. To slow motion in mechanical systems, you can add friction or resistance, which turns kinetic energy into heat.
When dealing with thermal energy, you can place the object in a cooler environment, which will enable it to transmit heat and cool down. It is possible to lessen an object's potential energy by changing its height or location within a gravitational field. Reactions that release energy can dissipate chemical energy. These strategies essentially entail aiding energy transfer or conversion to a less energetic state, hence lowering the object's overall energy content.
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What is the speed of a walking person in m/s if the person travels 2000 m in 35 minutes?
Answer:
speed = distance / time taken
=2000/35
=57.14 m/s
Explanation:
this is the answer plz add it as brainliest
Answer:
0.952 m/s
Explanation:
what is a mechanism?
A mechanism is what is responsible for any action or reaction. Machines are based on the idea of transmitting forces through a series of predetermined motions. These related concepts are the basis of dynamic movement.
How far (in meters) will you travel in 3 minutes running at a rate of m/s?
There are 60 seconds in 1 minute. So, 3 minutes is the same as 3×60=180 seconds. If you travel 6 m/s (meaning after 1 second, you've run 6 meters), then after 3 minutes (or 180 seconds), you have run 6×180=1080 meters.
Verdah, Hetav and Dhinesh are undertaking an investigation into the motion of wooden blocks in their Physics class. Their aim is to determine the effect that mass has on the horizontal motion of the wooden block across a table.
Verdah suggests that they use a launcher to give both blocks the same initial velocity and that they use the same table for each trial.
The blocks are made from the same wood but have different masses. The mass of block A (m1) is twice the mass of block B (m2). The coefficient of friction between the blocks and the table is u.
A. Derive a mathematical expression that the students could use to find the distance block A travels after it leaves the launcher. Upload a copy of your HANDWRITTEN working clearly identifying all equations and constants used in your derivation. Make sure your name is visible next to your working.
Answer:
u can find answer in quora
Explanation:
What is the difference between a scientific theory and a scientific law?
Theories combine several laws into one.
Theories are upgraded into laws once they are proven.
Laws use mathematical explanations and theories do not.
Laws describe what happens but theories explain why or how.
Answer:
laws describe what happens but theories explain why or how
.Why does the tension in each chain of a
carrying a child increase as an adult pulls the
swing backward?
True or false: it would take 100 years on a space shuttle to reach the closest galaxy
I NEED HELP!!!!!!!!!!!
Answer:
I would guess the following:
The smallest part of the element is: (the atom)
proton, neutron, electron (atomic particles
The proton has mass and is positive
The neutron has mass and no charge
The electron has (very small) no mass and negative charge,
Each atomic particle has a different atomic weight.
Part G
Based on your observation of the Tracker videos and the calculations of average vertical velocity and acceleration,
• Why do you think the vertical acceleration values are not equal to the theoretical acceleration due to gravity, -9.81 meters/second?
• What can you say about your earlier prediction about which ball will land first? If your hypothesis was wrong, can you propose an alternate
rationale for the observed results?
Answer: I think the vertical acceleration values are not equal to the theoretical acceleration due to gravity, -9.81 meters/second2 due to the gravity force and maybe the drag due to air resistance.
Explanation: About my earlier prediction about which ball will land first, I can say that my hypothesis was right, but not quite because I calculated the average vertical acceleration, where the time period is t = 0.10 second to t = 1.00 second, the results were different. If the result were maybe right or close to the I would have said that my hypothesis was correct.
What mass of lead has the same volume as 1600kg of petrol?
Answer:
The volume of 1600 kg of petrol is 1600/800 = 2 m^3. As the density of lead is 11400 kg/m^3, the mass of 2 m^3 is 11400*2 = 22800 kg. The mass of lead with the same volume as 1600 kg of petrol is 22800 kg.
Fatima is watching her pet cat, Winter, napping in the sun. Fatima is curious about the heart rate of Winter when she is napping, so she develops this scientific question: Does a cat’s heart rate change while it is napping
We have that for the question, Does a cat’s heart rate change while it is napping?
Cats heart rate do not increase while napping.
The range of heart beat of a cat is 140 and 220 bpm
From the Question we are asked
Does a cat’s heart rate change while it is napping.
The answer is NO
Cats heart rate do not increase while napping. Cat have a normal heart beat maximum of 220 beats per minute consistently.The range of heart beat of a cat is 140 and 220 bpm
Therefore
There is something with a cat with heart rate above this number.
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Alvin and Theodore race across a parking lot 451 cm long. Alvin travels at 19.28 cm/s and Theodore at 12 cm/s. When the Alvin crosses the finish line, how far behind is Theodore?
Theodore is 170 centimeters from the finish line when Alvin crosses it.
The total distance is 451 cm, so we can find the time that takes Alvin to crosses the finish line as follows:
[tex] v_{a} = \frac{x}{t} [/tex] (1)
Where:
[tex] v_{a}[/tex]: is the speed of Alvin = 19.28 cm/s
x: is the total distance = 451 cm
t: is the time that takes Alvin to crosses the finish line =?
By solving equation (1) for t, we have:
[tex]t = \frac{x}{v} = \frac{451 cm}{19.28 cm/s} = 23.4 s[/tex]
Now, after 23.4 seconds have elapsed, Theorode has traveled the following distance ([tex]x_{t}[/tex]):
[tex] x_{t} = v_{t}*t [/tex]
Where:
[tex]v_{t}[/tex]: is the speed of Theodore = 12 cm/s
[tex] x_{t} = v_{t}*t = 12 cm/s*23.4 s = 281 cm [/tex]
The distance (d) that Theodore needs to travel to cross the finish line is:
[tex]d = x - x_{t} = 451 cm - 281 cm = 170 cm[/tex]
Therefore, Theodore is 170 centimeters from the finish line when Alvin crosses it.
You can learn more about speed here: https://brainly.com/question/22610586?referrer=searchResults
I hope it helps you!
Tarzan swings back and forth on a
vine with a period of 7.27 s. How
long is the vine?
(Unit = m)
Answer:
Considering Tarzan as a point mass at point L and using the equation for a simple pendulum:
P = 2 pi (L / g)1/2
P^2 = 4 pi^2 L / g
L = g P^2 / (4 pi^2) = 9.8 m/s^2 * 7.27^2 s^2 / (4 pi^2) = 13.1 m
Answer: 13.1
Explanation:
If a car's initial velocity is 24 m/s E, and 3 seconds later the car's
velocity is 12 m/s E, what is the acceleration of the car during those
3 seconds?
Please find the attached photo for your answer. Hope it helps..
A diagram shows how gravity on Earth works on an object located in different spots in a seaside community. Where is gravity between Earth and an object the strongest?
A when the object is on the highest branch of a pine tree
B when an object is at sea level
C when the object is on top of a nearby mountain
D when the object is on top of a telephone pole
Answer:
B) when an object is at sea level
Explanation:
Answer:
When the object is at sea level
Explanation:
A wheelbarrow of mass 20 kg accelerates from rest and reaches speed of 10m/S2 in 5 seconds.its force?
Answer:
[tex]\boxed {\boxed {\sf 40 \ Newtons}}[/tex]
Explanation:
We are asked to find the force of a wheelbarrow. According to Newton's Second Law of Motion, force is the product of mass and acceleration.
[tex]F= \ m \times a[/tex]
1. Calculate AccelerationThe mass of the wheelbarrow is 20 kilograms. We are not given the acceleration, so we must calculate it using the following formula.
[tex]a= \frac{v_f-v_i}{t}[/tex]
The wheelbarrow starts at rest or 0 meters per second (initial velocity) and accelerates to reach 10 meters per second (final velocity) in 5 seconds (time).
[tex]v_f=[/tex]10 m/s [tex]v_i=[/tex]0 m/s t= 5 sSubstitute these values into the formula.
[tex]a= \frac{ 10 \ m/s-0 \ m/s}{5 \ s}[/tex]
Solve the numerator.
[tex]a= \frac{10 \ m/s}{5 \ s}[/tex]
Divide.
[tex]a= 2 \ m/s/s[/tex]
[tex]a= 2 \ m/s^2[/tex]
2. Calculate ForceNow we know the mass and acceleration of the wheelbarrow
m= 20 kg a= 2 m/s²Substitute the values into the force formula.
[tex]F= 20 \ kg \times 2 \ m/s^2[/tex]
[tex]F= 40 \ kg*m/s^2[/tex]
Convert the units. 1 kilogram meter per square second is equal to 1 Newton, so our answer of 40 kilogram meters per square second is equal to 40 Newtons.
[tex]F= 40 \ N[/tex]
Answer:
40 N
Explanation:
We know that
F = ma
and
a = (v - u)/t
So,
F = m(v - u)/t
F = 20(10 - 0)/5
F = 20(10/5)
F = 20(2)
F = 40 N
According to Newton’s first law of motion, the state of motion of an object does not change as long as the net force acting on the object is __________.
Answer:
Unalanced
Explanation:
The constant motion of a object will not be altered unless another force acts upon it, which will unbalance the object.
find the difference between infectious agents and diseases
Answer:
A disease is a disorder in the function of the human body where as infectious agents are organisms that cause diseases
us
Calculate the answer to the correct
number of significant digits.
15.3
+ 1.285
Answer:
15.3
+1.285
---------------
Answer = 16.585
What is time dilation? Is that a thing only in the movies? I need a good explanation that is simple enough for me
A basket contains 7 white cats and 15 black cats. What is the ratio of the number of white cats to the number of black cats?
1. °C= (°F-32) X 5/9. what will be the answer?
2. °F= 9/5 (°C)+32
3. °K= °C+273
4. D= m/V
Answer:
F=9/5(°C)+32
Explanation:
Lets take an example
Take 25°C[tex]\\ \sf\longmapsto \dfrac{9}{5}(25)+32[/tex]
[tex]\\ \sf\longmapsto 9(5)+32[/tex]
[tex]\\ \sf\longmapsto 45+32[/tex]
[tex]\\ \sf\longmapsto 77°F[/tex]
A window in a room is open. The next day, the temperature of the room has increased, but the pressure of the air has stayed the same.
State and explain what has happened to the mass of air in the room
Answer:
Explanation:
Hey Jinnin! It's Li Aing here. TELL ME WHEN YOU GOT THE ANSWER
Which is most likely the length of a student’s textbook?
30 millimeters
30 centimeters
30 decimeters
30 hectometers
Part C
Now observe the graph of the vertical velocity against time (vy vs. t). To do so, click the "Y"label on the vertical axis and select "vy: velocity y-
component" from the pop-up menu.
Answer:
The velocity is decreasing over the time linearly not parabolically. About the mathematical relationship between y-velocity and time here says that there appears to be no outliers, the graph looks to have a strong positive connection, and because the graph is attached, it appears to be more linear.
Explanation:
An alternating voltage of 25.0 V is connected across the primary coil of a transformer.
Input Voltage 25 V
ind Output Voltage
50 V Output Current
Input Current 5 A
What is the current across the secondary coil? A 2.5 A C 250 A B D 5.0 A 500 A
Answer:
A
Explanation:
Wattage = E * I
E = 25
I = 5
Wattage = 25 * 5
Wattage = 125
The secondary, in an ideal transformer has the same wattage.
125 = 50 * I Divide by 50
125/50 = I
I = 2.5
2. The convex mirror shown below has an object placed 15cm in front of it. An image is formed 35 cm
from the mirror. What is the nature of the image? Calculate the magnification of the image and the focal
length of the mirror.
Answer:
m = image distance/object distance
m=35/15=7/3
f=uv/(u+v)
35*15/(35+15)
f=10.5cm
<3
A person weighing 600 N gets on an elevator, The elevator lifts the person 6 min
10 seconds, How much power was used?
600 W
360 W
3600 W
60 w
Answer:
Itś 360 W
Explanation:
took the test
can someone help me convert these?
Assuming you are supposed to write each conversion in scientific notation:
(2) 1 m = 100 cm, so
(67 cm) × (1/100 m/cm) = 67/100 m = 0.67 m = 6.7 × 10 ⁻¹ m
(3) 1 km = 1,000 m, so
(1.2 km) × (1000 m/km) = 1200 m = 1.2 × 10³ m
(4) 1 m = 1,000 mm = 10³ mm, so
(6.2 × 10 ⁻³ m) × (10³ mm/m) = 6.2 mm
(5) 1 m = 1,000,000,000 nm = 10⁹ nm, so
(4.05 × 10³ nm) × (1/10⁹ m/nm) = 4.05 × 10 ⁻⁶ m
(6) 1 g = 1,000,000 µg = 10⁶ µg, so
(3200 µg) × (1/10⁶ g/µg) = 3200 × 10 ⁻⁶ g = 3.2 × 10 ⁻³ g
