When you use your senses to gather information you are
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An observation is information we gather about something by using the senses.
Related Questions
In her dissertation research, a graduate student finds a correlation of +0.95 between two of the variables being studied. How should she interpret this correlation coefficient
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Answer:
Explanation:
A correlation of +0.95 between two variables signifies a strong positive relationship between the two measured variables (the dependent and independent). The value is usylay called the correlation Coefficient (r) as it measures the level or degree of relationship or correlation between two measured linear variables. The value ranges between - 1 and +1 with + signifying a positive relationship (increase or decrease in one variable leads to corresponding increase or decrease in the other) while a negative correlation means (a decrease in A leads to increase in B and vice versa). A correlation Coefficient of 0 means no relationship and the strength of the relationship increases as the value approaches - 1 or +1.
explain about ohm's law.
Answers
Answer:
Statement:
The electric current passing through a conductor is directly proportional to the potential difference across its ends provided temperature and other physical conditions remain constant.
Explanation:
Current is directly proportional to voltage loss through a resistor. That is, if the current doubles, then so does the voltage. To make a current flow through a resistance there must be a voltage across that resistance. Ohm's Law shows the relationship between the voltage (V), current (I) and resistance (R).
V∝I or I∝V⇒V=IR.
Explanation:
Ohm's law states that the current through a conductor is proportional to the voltage across the conductor. This is true for many materials (including metals) provided the temperature (and other physical factors) remain constant. The constant of proportionality, R,R is the resistance and the unit is the ohm, with symbol \Omega,Ω. The relationship can be written as:
V, equals, I, R.
V=IR
where V,V is the voltage across the conductor and I,I is the current flowing through it. If a component is ohmic (it obeys Ohm's Law), then its resistance must be independent of current and voltage.
A particular engine takes in 10,000 J of heat, does 2,000 J of work, and as it runs discharges heat. Its own energy is the same when it
has finished as when it started. How much heat did it discharge if this is a closed system?
10,000 J
12,000 J
2,000 J
8,000 J
Answers
Answer:
8000 J
Explanation:
There is a Quizlet made by a teacher with this answer.
you are the person in charge of building a nuclear power plant in florida. your first choice is to select a
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Answer: you are the person in charge of building a nuclear power plant in Florida. your first choice is to select a site for building the power plant.
Explanation: To find the answer, we need to know more about the nuclear power plants and the criteria to select the site for power plant.
What you mean by nuclear power plants?Nuclear power can be defined from the nuclear fission reaction.These power plants will heat the water to produce steam and this steam is used to spin large turbines and thus generates electricity.How to select the site for nuclear power plant?We have to consider the following things,keep distance from populated area.distance from load center.Accessibility to site.Water availability and fuel availability.waste disposal.Thus, we can conclude that, before building a nuclear power plant, our first choice should be to select a site.
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Sorry to bother y’all again but can someone pls help me
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Answer:
definitely top answer
Explanation:
because it make sense
The chart below shows information about three stars.
Name of Star Beginning of life cycle End of life cycle
Star 1 nebulae white dwarf
Star 2 nebulae neutron star
Star 3 nebulae black hole
Which of these statements is most likely correct about the three stars?
They do not emit energy.
They do not have the same initial mass.
They are made of the same materials.
They have the same quantity of elements.
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The most likely correct about the three stars is: They do not have the same initial mass.
What is Chandrasekhar limit?The Chandrasekhar limit is established at a mass where the gravitational field's self-attraction cannot be balanced by the pressure from electron decay. The limit that has been established these days is 1.39 solar mass.
Hence, stars of average masses ends by forming white dwarf or neutron star but massive stars ends their life by forming black hole. Hence, They do not have the same initial mass.
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How long a main sequence star remains on the main sequence in the h-r diagram depends most strongly on.
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The length of time a main sequence star remains on the main sequence in the H-R diagram depends most strongly on its mass.
The more massive a star is, the hotter and brighter it is, and the faster it burns through its fuel, shortening its time on the main sequence. On the other hand, lower-mass stars burn their fuel more slowly and can remain on the main sequence for billions of years.
what is mass?
Mass is a measure of the amount of matter in an object. It is a scalar quantity and is usually measured in kilograms (kg). The mass of an object is constant and does not change with location or gravitational force acting on it. It is one of the fundamental properties of matter and is used to describe and compare the properties of objects, including their weight and inertia.
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A child of mass 40kg jumps off a wall and hits the ground at 4m\s.he bends his knees and stops in 1s.calculate the force required to slow him down.how would this force be different if he didn't bend his knees and stopped in 0.1s?
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Answer:
F
=
m
Δ
v
t
force = mass * change in velocity / time
at
1
s:
mass:
40
kg
change in velocity (taking downwards as a positive direction):
4
m/s to rest
=
4
−
0
=
4
m/s
time:
1
s
m
Δ
v
t
=
160
1
=
160
force applied
=
160
N
at
0.1
s:
m
Δ
v
t
=
160
0.1
=
1600
force applied =
1600
N
Force acts on a pebble with position vector , relative to the origin. What is the resulting torque acting on the pebble about (a) the origin and (b) a point with coordinates (8.62 m, 0, -2.93 m)
Answers
Answer:
Incomplete question, but let analyse generally a torque acting on a rotating body
Explanation
Toque is given as
τ = r × F
Where
τ is the torque (Nm)
r is the position vector (m)
F is the force (N).
Let assume we have the following data
F= x•i + y•j + z•k
Also let assume the position vector is
r'= a•i + b•j + c•k
a. The first question, torque at the origin
The origin will have a position vector of r1(0,0,0)
Then, the displacement is
r=AB=AO+OB=-OA+OB
r = r'-r1 = (a, b, c)-(0,0,0)
r=(a, b, c)
Then, the torque is given as
τ = r×F
τ = (a, b, c) × (x, y, z)
Note that
i×i=j×j=k×k=0
i×j=k, j×i=-k
j×k=i, k×j=-i
k×i=j, i×k=-j
τ = (a•i + b•j + c•k) × (x•i + y•j + z•k)
τ = a•i×(x•i + y•j + z•k) + b•j×(x•i + y•j + z•k) + c•k×(x•i + y•j + z•k)
τ = (a•i × x•i)+ (a•i × y•j) + (a•i × z•k) + (b•j × x•i) + (b•j × y•j) + (b•j × z•k) + (c•k × x•i) + (c•k × y•j) + (c•k × z•k)
Now, using the above law.
τ = 0 + ay•k - az•j - bx•k + 0 + bz•i + cx•j - cy•i + 0
τ= ay•k - az•j - bx•k + bz•i + cx•j -cy•i
Then, rearranging
τ = (bz - cy)•i + (cx - az)•j + (ay - bx)•k
This is general formula for the torque at the origin, so you can apply it to the given values in your question because the question given is not complete.
b. Now let, analyse at the position vector (2.61 m, 0, -8.03 m)
Using the same analysis
position vector of r1(2.61, 0, -8.03)m
Then, the displacement is
r=AB=AO+OB=-OA+OB
r = r'-r1 = (a, b, c)-(2.61,0,-8.03)
r=(a-2.61, b, c+8.03)
Then, the torque is given as
τ = r×F
τ = (a-2.61, b, c+8.03) × (x, y, z)
Note that
i×i=j×j=k×k=0
i×j=k, j×i=-k
j×k=i, k×j=-i
k×i=j, i×k=-j
τ =([a-2.61]•i, b•j, [c+8.03]•k) × (x•i + y•j + z•k)
τ = (a-2.61)•i×(x•i + y•j + z•k) + b•j×(x•i + y•j + z•k) + (c+8.03)•k×(x•i + y•j + z•k)
τ = ((a-2.61)•i × x•i)+ ((a-2.61)•i × y•j) + ((a-2.61)•i × z•k) + (b•j × x•i) + (b•j × y•j) + (b•j × z•k) + ((c+8.03)•k × x•i) + ((c+8.03)•k × y•j) + ((c+8.03)•k × z•k)
Now, using the above law.
τ = 0 + (a-2.61)y•k - (a-2.61)z•j - bx•k + 0 + bz•i + (c+8.03)x•j - (c+8.03)y•i + 0
τ= (a-2.61)y•k - (a-2.61)z•j - bx•k + bz•i + (c+8.03)x•j -(c+8.03)y•i
Then, rearranging
τ = (bz - cy - 8.03y)•i + (cx + 8.03x - az - 2.61z)•j + (ay - 2.61y - bx)•k
This is general formula for the torque at the point (2.61 m, 0, -8.03 m), so you can apply it to the given values in your question because the question given is not complete.
(a) Torque acting on the pebble about the origin is (-1.5i - 4j - 1k) Nm.
(b) Torque acting on the pebble about the given coordinate is 20j Nm.
What is meant by torque ?Torque is defined as the rotational analogue of force. It is the cross product of force and the perpendicular distance.
Here,
The position coordinates of the pebble, r = (0.5 m)j - (2 m)k
Force acting on the pebble, F = (2 N)i - (3 N)k
(a) About the origin
Torque acting on the pebble, τ = r x F
τ = (0.5j - 2k) x (2i - 3k)
τ = (0.5j x 2i) + (0.5j x -3k) + (-2k x 2i) + (-2k x -3k)
τ = -1k - 1.5i - 4j + 0
τ = (-1.5i - 4j - 1k) Nm
(b) At a point with coordinates (8.62m, 0, -2.93m)
Torque acting on the pebble,
τ = r x F
τ = (8.62i - 2.93k) x (2i - 3k)
τ = (8.62i x 2i) + (8.62i x -3k) + (-2.93k x 2i) + (-2.93k x -3k)
τ = 25.86j - 5.86j
τ = 20j Nm
Hence,
(a) Torque acting on the pebble about the origin is (-1.5i - 4j - 1k) Nm.
(b) Torque acting on the pebble about the given coordinate is 20j Nm.
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Your question was incomplete, but most probably your question was:
Force (2 N)i - (3 N)k acts on a pebble with position vector (0.5 m)j - (2 m)k, relative to the origin. What is the resulting torque acting on the pebble about (a) the origin and (b) a point with coordinates (8.62 m, 0, -2.93 m)
Convert the following as instructed:
i.340 cm into m
ii.67 kg into g
iii.2 days into second
iv.86400 second into day
Answers
6700g
172800s
1 day
Malachi uses some glue to fix a broken plate. He puts the glue under a desk lamp but the glue doesn't dry. Then he puts the glue out in the sun and it dries. Why does light from the sun dry the glue when light from the desk lamp does not?
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Answer:
The sun gives off a type of light that carries energy, and the light from the desk lamp does not
Explanation:
I got it off a Quizlet hope this helps!!
Because of its interactions with molecules that excite them and lead them to move more quickly, infrared energy is perceived as heat, raising the internal temperature of the item receiving it.
What light the sun dry the glue, light from the desk lamp?Because the light from the desk lamp does not carry energy, whereas the light from the sun does. Due to the fact that sunlight transfers heat to molecules, while a desk lamp does not.
Because compared to light from a desk lamp, UV light contains energy. Because the mirror can only absorb the energy from the infrared lamp, which emits a sort of light that the desk lamp does not.
Sunlight's ultraviolet rays can cause paper and cloth to lose their colour. When ultraviolet light waves are present, the compounds in coloured dyes can degrade. Sunburns can also be brought on by ultraviolet rays.
Therefore, The light from the desk lamp does not carry energy, whereas the light from the sun does.
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An 65 kg Olympic runner leaps over a hurdle . The acceleration of gravity is 9.81m/s^2 if the runner initial vertical speed is 2.8 m/s, how much will the runners center of mass be raised during the jump
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The runner's center of mass will be 0.40 meter raised during the jump.
What is speed?Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.
Initial vertical speed of the Olympic runner = 2.8 m/s
Acceleration due to gravity = 9.8 m/s²
Mass of the Olympic runner = 65 kg
Hence, the runner's center of mass will be raised during the jump
= (Initial vertical speed )² ÷ (2 × Acceleration due to gravity)
= 2.8²/(2 ×9.8) meter
= 0.40 meter.
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At a distance of 2.00 m from a point source of sound, the intensity level is 80.0 dB. What will be the intensity level at a distance of 4.00 m from this source? The lowest detectable intensity is 1.0 10-12 W/m2. A) 74.0 dB B) 77.0 dB C) 40.0 dB D) 20.0 dB E) 60.0 dB
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The answer to the question is:
77.0 dB
When the distance from a point source of sound is doubled, the intensity level decreases by 6 dB. This decrease in intensity level with increasing distance is due to the spreading of sound waves over a larger area. According to the inverse square law, the intensity of sound is inversely proportional to the square of the distance from the source.
In this case, the distance is doubled from 2.00 m to 4.00 m. Since the distance is doubled, the intensity level will decrease by 6 dB. Therefore, we subtract 6 dB from the initial intensity level of 80.0 dB.
80.0 dB - 6 dB = 74.0 dB
So, the intensity level at a distance of 4.00 m from the source will be 74.0 dB.
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Which one of these is NOT equal to linear velocity?a.v2/r b.displacement/time c.2πfrd.ωr
Answers
The linear velocity in terms of the angular velocity is,
\(v=\omega r\)where,
\(\omega\text{ is the angular velocity, r is the radius of the circular motion}\)The angular velocity in terms of the linear frequency is,
\(\omega=2\pi f\)Thus, the linear velocity in terms of linear frequency is,
\(v=2\pi fr\)The linear velocity in terms of the displacement and time is,
\(v=\frac{\text{displacement}}{\text{time}}\)The relation given in the first option is the expression for centripetal acceleration.
\(a_c=\frac{v^2}{r}\)Thus, option a is the correct answer.
When Maria rubbed her solid graphite pencil against paper, it easily left a clear streak on the paper. Which model could represent graphite?
Answers
Answer:
B
Explanation:
:p
Option B is the correct answer.
Graphite has a layered structure, every layered structure has rings which consists of six carbon atom.
What is Graphite and what are its characteristics?Graphite can be also known as black lead. As it can be structured with hexagonal shape it was also made as octahedral and tetrahedral which is known to be as diamond. Graphite is formed by carbonaceous compound, which can be solidified as magmatic carbon. Graphite can be taken from several ancient rocks, marbles, quartzite, under the soil, etc.. The graphite can be found easily by seeing the honeycomb shape, hexagonal structure, a molecule with six carbon atoms. These were also used in pencil leads, batteries, nuclear reactors, polishes, etc..
So, when Maria rubbed her solid graphite pencil against paper, it easily left a clear streak on the paper because of the atom presence and it hexagonal honeycomb structure.
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Hello, can anyone help me with this question?
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You can use the curved part of a spoon as a mirror because it
light.
Which best completes the statement?
O reflects
O refracts
O absorbs
O enhances
Answers
Answer:
the correct answer is actually refelcts
Explanation:
PLEASE HELP ASAP!!!!
Answers
T1 = 2×W / squrt (3) +1
T2 = squrt(6) ×W/ squrt (3) +1
Here, T1 is along A.
T2 is along B
W = 250N.
Yo can directly use above formula to find solution.
The origin of our solar system is attributed to the collapse of a single, rotating interstellar cloud of gas and dust known as a(n)
Answers
Answer:
nebula also called solar nebula
Explanation:
an electric charge (Q=-230nc) located at origin generate an electric field at point P located at (2 , 6)m(meter) find the electric filed at P *
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We are given the electric field equation so we input all the values we are given, eventually getting E = 51.75 N/C
the force of attraction between the earth and objects on it is called..
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Answer: gravitational pull? gravity
Explanation:
someone help me in science plz
Answers
Answer:
I would say Climate - A
Explanation:
Just looks like the logical thing.
Explanations based on supernatural forces, values or ethics can never be disproved and thus do not fall under the realm of science.
options:
True
False
Answers
Answer:
true, since science does not believe and agree to the supernatural.
what is the wavelength of a beam of light having a frequency of 6 × 1017 hz?
Answers
The wavelength of the light beam having a frequency of 6 × 1017 hz is 0.05 nm.
To calculate the wavelength of a light beam, we can use the formula:
λ = c/f
Where λ is the wavelength, c is the speed of light and f is the frequency of the light.
The speed of light is approximately 3 x 10^8 m/s, we can use this value to find the wavelength.
λ = c/f
λ = (3 x 10^8 m/s) / (6 x 10^17 Hz)
λ = 0.05 nm
So the wavelength of the light beam is 0.05 nm.
It's important to mention that the wavelength is inversely proportional to the frequency, meaning if the frequency is high the wavelength is short and if the frequency is low the wavelength is long.
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I just need to know how to get the answer
Answers
F=150N.
A high wind velocity is defined as quickness of motion or operation; swiftness; or speed.
The speed at which a body's position changes over time in a given direction is known as mechanics. the velocity of activity or reaction; the rate at which something occurs.
Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is traveling along a path. The displacement that an object or particle experiences with respect to time are expressed vectorially as velocity
(1400-1250)
150 N
F=150N
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If a skateboarder is moving at 4 meters per second then changes its velocity to 10
meters per second over the course of 10 seconds what is the skateboards acceleration?
Answers
Answer:
i was doing this is it actually 0.6
Explanation:
;D
The acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².
What is Motion?Motion is simply the change in position of an object over time.
From the First Equation of Motion;
v = u + at
Where v is final velocity, u is initial velocity, a is acceleration and t is time elapsed.
Given the data in the question;
Initial velocity u = 4m/sFinal velocity v = 10m/sTime elapsed t = 10sAcceleration of the skateboard a = ?To determine the acceleration of the skateboard, we substitute our given values into the expression above.
v = u + at
10m/s = 4m/s + ( a × 10s)
( a × 10s) = 10m/s - 4m/s
a × 10s = 6m/s
a = 6m/s ÷ 10s
a = 0.6m/s²
Therefore, the acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².
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a nuclear power plant generates 1 gwe at 37fficiency. water is piped into the facility at 10°c and is output from the facility at 32°c. determine the flow rate of the water in kg/s.
Answers
where T is the temperature change from 10°C to 32°C, q is the rate of heat transfer, m is the mass flow rate of water, c is the heat capacity of water, and m is the mass flow rate of water. The water flow rate in kg/s
The amount of fluid that passes through a pipe or container in one unit of time is referred to as the flow rate. It is often expressed in terms of volume per unit time, such as gallons per minute or cubic metres per second. The viscosity of the fluid, the pipe's diameter, the fluid's pressure, and the length of the pipe are some of the variables that might affect flow rate. In many applications, including water treatment, industrial operations, and energy generation, it is crucial to comprehend and manage flow rate. An improper flow rate can result in waste, inefficiencies, and even equipment
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A block is on a surface with µs=0.276. It takes 1.11 N to break it free from static friction. What is the mass of the block?
Answers
Answer:
0.407 kg
Explanation:
Given :
Coefficient of static friction, µs = 0.276
Force, F = 1.1 N
Using the relation :
μ = F/N
N = normal reaction ; N = mg
μ = F / mg
g = acceleration due to gravity = 9.8 m/s²
0.276 = 1.1 / m * 9.8
0.276 = 1.1 / 9.8m
0.276 * 9.8m = 1.1
2.7048m = 1.1
m = 1.1 / 2.7048
m = 0.4066844
Mass = 0.407 kg
Another piece of copper has a volume of 7 cm3 what is its mass?
Answers
The mass of a piece of copper that has volume of 7\(cm^{3}\) is 62.58g.
A piece of copper has a volume of 7 \(cm^{3}\), find what is its mass?The element copper (Cu) is a reddish, very ductile metal belonging to Periodic Group 11 that has an exceptional ability to conduct heat and electricity. In nature, copper can be found in its free metallic state.
Given,
Volume = 7 cm^3
we know that,
The density of copper is 8.960g/cm^3 in room temperature.
Density = mass / volume
Mass = Density x Volume
Mass = 8.960 x 7
Mass = 62.72 g
Mass of copper has a volume of 7 cm^3 is 62.72g.
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You are driving on a freeway posted for 65 mph. Traffic is heavy and moving at 35 mph. The best speed for you vehicle is most likelyA. 25 mphB. 30 mphC. 35 mph
Answers
Based on the information provided, the best speed for the vehicle would be around 30 mph. So, correct option is B.
Given the scenario, it is clear that traffic is heavy, and the speed of the vehicles is considerably less than the posted speed limit. It is important to maintain a safe and efficient speed to avoid accidents and to ensure smooth traffic flow.
This speed is a balance between moving too slowly and causing traffic disruptions and moving too fast, which can lead to unsafe conditions.
Driving at 25 mph may cause disruptions in traffic flow, and driving too slowly can be dangerous, especially on a busy freeway. On the other hand, driving at 35 mph may be too fast for the surrounding vehicles, leading to unsafe conditions and an increased risk of accidents.
Overall, the best course of action is to maintain a speed of around 30 mph, which allows for efficient traffic flow and minimizes the risk of accidents.
So, correct option is B.
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