Answer: The property that will best provide evidence that the samples are solid includes:
--> if the substance has a definite shape,
-->if the substance has a definite volume
--> if it's tightly packed.
Explanation:
According to the kinetic theory of matter, every substance consist of very large number of very small particles called molecules. These molecules, which are made up of atoms that are the smallest particles of a substance that can exist in a free state.
Matter can exist in the following states:
--> Solid state
--> liquid state or
--> Gaseous state.
The general property of a substance that is in gaseous state includes:
--> Definite shape: A substance can be grouped as a solid if it's shape is fixed that is, it doesn't depend on the shape of other materials.
--> Definite volume: A substance can be grouped as a solid if it occupies its own shape. This is due to the force of cohesion among its molecules.
--> Tightly packed: A substance can be grouped as solid if the molecular movements of the particles are negligible.
From the samples under observation by Juan and kym, if the sample that possesses the above described qualities, it is a solid rather than liquid or gas.
What is the kinetic energy of a ball that has a mass of 3kg and Is
moving at 5m/s?
Answer:
E kin = 1/2 • m • v^2
E kin: kinetic energy
m: mass
v: velocity
Explanation:
when operating a heater of 1500 watts for 3 hours per day the consumed energy and the total cost of 25 dirhams during a month (30 days) are ... and ...?
Answer:
I. Consumed energy = 4.5Kwh
II. Total cost = 3375 Dirhams
Explanation:
Given the following data;
Power = 1500W
Time = 3 hours
To find the energy consumption;
Energy = power * time
Substituting into the equation, we have;
Energy consumption = 1500 * 3
Energy consumption = 4500 watt-hour = 4.5Kwh (1 Kilowatts is equal to 1000 watts)
To find the total cost;
Daily cost = Energy consumption * cost
Daily cost = 4.5 * 25
Daily cost = 112.5 Dirham
Therefore, monthly cost = 112.5 * 30
Monthly cost = 3375 Dirham.
A 20-kilogram object strikes the ground with 1960 J of kinetic energy after falling freely from rest. How far above the ground was the object when it was released? *
Answer:
h = 10 m
Explanation:
Given that,
Mass of an object, m = 20 kg
It strikes the ground with 1960 J of kinetic energy after falling freely from rest.
We need to find how far above the ground was the object when it was released. Let it is h.
The kinetic energy is converted to potential energy. It can be given by the relation as follows :
[tex]E=mgh\\\\h=\dfrac{E}{mg}\\\\h=\dfrac{1960}{20\times 9.8}\\\\h=10\ m[/tex]
So, it was at a height of 10 m when it was released.
How do grocery stores arrange their items?
Answer:
How Are Grocery Store Aisles Organized? The aisles of a grocery store are organized into categories. ... Dairy aisles are along the back not connected to but close by the meat section. This will bring you back to the front of the other side of the store where the bread and bakery area is
WILL MARK BRAINLIEST
Which graph shows the relationship between temperature, X, and kinetic energy, Y?
An illustration of a triangle with the base labeled X with the height labeled Y.
A graph with the x axis labeled X and the y axis labeled Y. There is a diagonal line from the origin.
A graph with the x axis labeled X and the y axis labeled Y. There is a horizontal line.
A graph with the x axis labeled X and the y axis labeled Y. There is a vertical line.
Answer:
no 2 A graph with the x axis labelled X and Y axis labelled Y
A 1,200 kg car travels at 20 m/s. what is its momentum?
Answer:
The answer is 24 000kgm/s.
Explanation:
Given that the formula for momentum is p = m×v where m represent mass and v is speed :
let m = 1200, v = 20
p = m × v
p = 1200 × 20
p = 24 000 kgm/s
difference between dry cell and simple cell
Simple cells have liquid chemicals, making it harder for it to carry. While as dry cells have no liquid chemicals, making it easier to carry.
explain, in brief, the cause of an earthquake
Answer:
An earthquake is caused by a sudden slip on a fault. ... When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel. In California there are two plates - the Pacific Plate and the North American Plate
Explanation:
just write it in ur own words
a car is moving at 4m/s has 500N force driving it forward and air resistance of 500N. Describe the motion of the car
Answer:
See the explanation below.
Explanation:
We know from Newton's second law that the sum of forces on a body is equal to the product of mass by acceleration. In this way, we have the following equation.
∑F = m*a
where:
∑F = sum of the forces [N] (units of Newtons)
m = mass of the car [kg]
a = acceleration [m/s²]
Therefore we have two forces one that drives the car forward and another that opposes the movement.
[tex]500-500 = m*a\\m*a=0\\a=0[/tex]
This tells us that the acceleration is zero and therefore the movement is with constant speed. That is, the speed does not vary during the movement of the vehicle.
Which types of light are absorbed by genetic material?
ultraviolet (UV)
visible
infrared (IR)
microwave F radio
Explanation:
the answerer is visible
Genetic material is known to absorb UV light. Given what we know, we can confirm that genetic material is not known to absorb light originating from an infrared or microwave radio source.
What light does genetic material absorb?Genetic material is the hereditary substance in the cell. It carries all information specific to an organism. It is known as DNA (deoxyribonucleic acid) or RNA (ribonucleic acid)
UV light is electromagnetic radiation, and the primary source of UV light that we are exposed to is the sun.
Therefore, given that the only form of light listed that genetic material is known to absorb is that of Ultraviolet or UV light, we can confirm that the answer to the question proposed is infrared and microwave radio light.
To learn more about UV light visit:
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Convert 1 mm to meters using scientific notation. Include units in your answer.
Group of answer choices
100.0 x 10^-3 m
1.0 x 10^-3 m
10.0 x 10^-3 m
0.010 x 10^-3 m
Answer:
1.0 x 10^-3 m
Explanation:
1mm = (1/1000) m = 0.001m = 1.0 x 10^-3m (because to get 1.0, you have to movi the decimal point in the "0.001" three spots over to the right)
Which describes a condition of the neritic zone?
few organisms
ample sunlight
changing salinity
frigid temperatures
Answer:
ample sunlight
Explanation:
Neritic zone have ample of sunlight
What is Neritic zone ?The neritic zone is covered with generally well - oxygenated water , receives plenty of sunlight , have relatively stable temperature , has low water pressure and stable salinity levels .
Hence , correct option is option b) ample sunlight
Learn more about Neritic zone :
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#SPJ2
A child is playing with a toy car, and it accelerates
to the south from 1.2 m/s to 6.3 m/s. If the toy car's
acceleration is 2.75 m/s2, what is the amount of time
that the child takes to accelerate the car?
Answer:
1.86s
Explanation:
Given parameters:
Initial velocity = 1.2m/s
Final velocity = 6.3m/s
Acceleration = 2.75m/s²
Unknown:
Time it takes for the child to accelerate the car = ?
Solution:
Acceleration is the rate of change of velocity with time.
a = [tex]\frac{v - u}{t}[/tex]
a is the acceleration
v is the final velocity
u is the initial velocity
t is the time taken
2.75 = [tex]\frac{6.3 - 1.2}{t}[/tex]
5.1 = 2.75t
t = 1.86s
Two students are playing catch with a 0.20 kg baseball. The first student throws the ball at 25 m/s. How much work is done by the second student in stopping the ball?
Answer:
W = 62.5 J
Explanation:
Given that,
Mass of a baseball, m = 0.2 kg
Initial speed of first student, u = 25 m/s
Finally, the ball stops, v = 0
We need to find the work done by the second student in stopping the ball. We know that, work done is equal to the change in kinetic energy. It can be given by :
[tex]W=\dfrac{1}{2}m(v^2-u^2)\\\\W=-\dfrac{1}{2}mu^2\\\\W=-\dfrac{1}{2}\times 0.2\times(25)^2\\\\W=-62.5\ J[/tex]
So, the required work done is 62.5 J.
object height 10cm is placed in front of plane mirror.The height of the image will be_______?
A car magazine article claims that the new UltraCar 5000, only $10,000,000, can travel around a 50 m radius curve at 200 m/s.
What is the centripetal acceleration?
Does this seem to be possible?
Explanation:
it could be possible if the car has all the right aro dynamics
Which phrase is the best description of a space probe?
A. An exploratory spacecraft that does not carry people
ООО
B. A rocket that has a very large amount of thrust
C. A telescope that allows you to see the Sun's surface
D. A spacecraft that can carry people to the Moon
Answer:
A is the answer
Explanation:
I ust did it on a p e x
Answer:
a
Explanation:
Got it right on A P E X
An 800 N man climbs 5 m up a ladder. How much gravitational potential energy does he gain?
Answer:
4000J
Explanation:
Given parameters:
Weight of the man = 800N
Height of ladder = 5m
Unknown:
Gravitational potential energy gained = ?
Solution:
The gravitational potential energy is due to the position of a body.
Gravitational potential energy = weight x height
Now insert the parameters;
Gravitational potential energy = 800 x 5 = 4000J
The question in the photo.
Answer:
pretty sure it's vacuole. It stores water, nutrients, and disposes of waste.
Answer:
Your AnsweR is
Lysosome
Which kind of wind is most likely responsible for the movement of this
weather system from Dallas to St. Louis and then to Pittsburgh?
O A. Trade winds
B. Westerlies
C. Southern polar easterlies
O D. Northern polar easterlies
pls answer fast
Answer:
A. Trade winds
Explanation:
Dallas is located in southern US northern taxes, the city is bounded by highland park and hills. Dallas is a humid subtropical climate and is continental in nature is characterized by extreme weather events such as tornadoes and hailstorms.Answer:
b
Explanation:
Thx to random guy I know this
Is dependant variable what you measure?? yes or no
Answer:
YES
Explanation:
The dependent variable is the variable that is being measured or tested in an experiment. For example, in a study looking at how tutoring impacts test scores, the dependent variable would be the participants' test scores, since that is what is being measured
Answer:
You do measure a dependent variable
TRUE OR FALSE: Aquaponics decreases cost for equipment, energy usage, and land usage. *
Answer: b
Explanation:
b
Answer:
b
Explanation:
b
1 point
A box weighing 12 Newtons is dragged across a
rough floor with a constant velocity of 1.4 meters
per second. The horizontal applied force pulling
the box is 8.5 Newtons. What is the magnitude of
the friction force the floor exerts on the box?
Your answer
PLEASE ANSWER
Answer:
The magnitude of the friction force that the floor exerts on the box is 8.5 newtons.
Explanation:
From Newton's Laws of Motion and given that box is moving at constant velocity, the net acceleration of the box is zero, meaning that magnitude of friction force is equal to the magnitude of the horizontal applied force. Please notice that friction force is the reaction to the horizontal force. The equation of equilibrium for the box is:
[tex]\Sigma F = F - f = 0[/tex] (1)
Where:
[tex]F[/tex] - Horizontal applied force, measured in newtons.
[tex]f[/tex] - Friction force, measured in newtons.
If we know that [tex]F = 8.5\,N[/tex], then the magnitud of the friction force that the floor exerts on the box is:
[tex]f = F[/tex]
[tex]f = 8.5\,N[/tex]
The magnitude of the friction force that the floor exerts on the box is 8.5 newtons.
This is because we see evidence of plate movement in the fact that as we look at rocks farther and farther from the ridge, the rocks--
A)Have higher iron content
B)Are made up of smaller particles
C)Become thicker and thicker
D)Are consistently older
Answer:c
Explanation:
Answer:
C
Explanation:
Calculate the rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.
Answer: The rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.= 1.25 watt.
Explanation:
The rate of energy transfer from one point to another is known as power.Its SI. unit is Watt.Formula to compute power:
Power = [tex]I^2 R[/tex], I = cureent, R = resistance.
Given R = 5 ohm , Current = 0.5 A.
Then, power = [tex](0.5)^2\times 5=0.25\times5=1.25\ watt[/tex]
Hence, the rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.= 1.25 watt.
The crust, mantle, asthenosphere, and core are all parts of Earth’s
atmosphere.
biosphere.
hydrosphere.
geosphere
Costal residents must do many things to prepare for hurricanes
estion 20
Not yet answered Market out of 100 Flag question
Slim Jim lifts a 8 kg box to a height of 2 m. How much work did he do to the box?
What is the Elastic potential energy of a car spring that has been stretched 0.5 meters? The spring constant for the car spring is 90 N/m.
Answer:
PE = 11.25 J
Explanation:
Elastic Potential Energy
It's the energy stored in an elastic material like a spring of constant k, in which case the energy is proportional to the square of the change of length Δx and the constant k.
[tex]\displaystyle PE = \frac{1}{2}k(\Delta x)^2[/tex]
The car spring has a constant of k=90 N/m and it stretches Δx=0.5 m. The elastic potential energy is:
[tex]\displaystyle PE = \frac{1}{2}\ 90(0.5)^2[/tex]
Calculating:
PE = 11.25 J
Elastic potential energy is the potential energy held when an elastic item is stretched or compressed by an external force. The elastic potential energy of a car spring will be 11.25 J.
What is elastic potential energy?Elastic potential energy is the potential energy held when an elastic item is stretched or compressed by an external force. It is equal to the work done to extend the spring.
The given data in the problem is;
x is the distance by which spring got stretched = 0.5 m
k is the spring constant for the car = 90 N/m.
The formula for the elastic potential energy is;
[tex]\rm PE =\frac{1}{2} kx^{2} \\\\ \rm PE =\frac{1}{2} \times 90 (0.5)^{2} \\\\ \rm PE = 11.25\; J[/tex]
Hence the elastic potential energy of a car spring will be 11.25 J.
To learn more about the elastic potential energy refer to the link;
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How is MBC better than fuse wire
MCB is more sensitive to current than the fuse. It detects any abnormality in the current flow and automatically switches off the electrical circuit. In the case of MCB, the fault zone of the electrical circuit can be easily identified. ... But in case of the fuse, the entire fuse wire needs to be replaced.
