Students who have no interest or
active role in their learning are
in the classroom.
A. busy
B. passive
C. active
Answer:
The answer is B. passive
Explanation:
Answer:
passive
Explanation:
i say this because it makes the most sense to me and most of the time in the questions they go for the answer that makes the most sense so my final answer is (B.)
The force that keeps an object moving in a circle is called.
what do you mean by mechanical advantage is 2.5 of a machine?
Answer:
If you are using a machine that has a mechanical advantage of 2.5,you will have increased your EFFORT DISTANCE by 2.5 times. This allows you to REDUCE the EFFORT FORCE needed by 2.5 times.
What is the electric potential energy of a charge that experiences a force of 3. 6 × 10–4 N when it is 9. 8 × 10–5 m from the source of the electric field?.
The electric potential energy of a charge that experiences a force of 3. 6 × 10⁻⁴ N when it is 9. 8 × 10⁺⁵m from the source of the electric field will be 3.528×10⁻⁸ V.
What is electric potential energy?Electric potential energy is the amount of work needed to move a unit charge from a point to a specific point against an electric field.
The given data in the problem is;
F is the electric force= 3. 6 × 10⁻⁴ N
V is the electric potential=?
d is the distance = 9. 8 × 10⁻⁵ m
The electric potential energy is given as the product of the electric force and distance.
V=Fd
V = 3.6×10⁻⁴ ×( 9.8×10⁻⁵)
V = 3.528×10⁻⁸ V.
Hence the electric potential energy of a charge will be 3.528×10⁻⁸ V.
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Which of the following are correct units for acceleration? Chooses all that are correct.
m/s/s
km/hr/hr
m/s
s
km/hr/s
m
m/hr
Which element is magnetic?
O calcium
O chromium
O carbon
O cobalt
Answer: D. Cobalt
Explanation: Cobalt has excellent magnetic properties so it is D. Cobalt.
The element which has magnetic properties from the given list of elements would be cobalt , therefore the correct answer is option C.
What are metalloids?The elements of the periodic tables that behave as metals, as well as the nonmetal in some chemical or physical aspects, are known as metalloids. Some examples of metalloids are Boron , silicon , germanium, arsenic , antimony , tellurium , etc.
As given in the problem we have to find out the element which possesses the magnetic properties from the given list ,
Calcium belongs to group 2 of the periodic table and nonmagnetic element . Similarly , carbon is a nonmagnetic material .
Thus , the element which has magnetic properties from the given list of elements would be cobalt, therefore the correct answer is option C .
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If the speed of a wave is
150m/s and its frequency is
2Hz, what is its wavelenght?
Answer:
wavelength =75m
using v=fΠ
where Π is wavelength
lf an object's velocity changes from 25 meters per second to 15 meters per second in 2.0 seconds, the magnitude of the object's acceleration is
Answer:
-5 m/s^2
Explanation:
[tex]acceleration = \frac{change \: in \: velocity}{time} \\ \\ = \frac{15 - 25}{2} \\ \\ = \frac{ - 10}{2} \\ \\ = - 5 \: m {s}^{ - 2} \\ \\ negative \: sign \: represents \: that \: \\ object \: is \: slowing \: down.[/tex]
Explanation:
Acceleration is the change in velocity over time.
a = Δv / Δt
a = (15 m/s − 25 m/s) / 2.0 s
a = -5.0 m/s²
The magnitude of the acceleration is 5.0 m/s².
Suppose the line on a distance-versus-time graph and the line on a speed-versus-time graph are both slanted straight lines going through the origin. Can the two graphs be displaying the motion of the same object? Explain.
The two given graphs can be displaying the motion of the different objects. As the distance-versus-time graph shows the speed is constant while the speed-versus-time graph shows the uniform acceleration motion.
What is uniform acceleration motion?A uniformly accelerated motion is one in which the acceleration of the object throughout the motion is uniform. When an object is moving in a straight line with an increase in velocity at equal intervals of time, then we can say that object has uniform acceleration.
Projectile motion is an example of motion in a plane with uniform acceleration. The only acceleration acting on the particle is the acceleration due to gravity (g) in the case of projectile motion. Since there is no acceleration in the horizontal direction, the velocity in the x-direction will be constant.
In the distance-versus-time graph, the straight line passing through the origin shows the increase in the distance at equal intervals of time. So, the speed of the object will be constant.
The speed-versus-time graph shows the increase in the speed at equal intervals of time. So, the acceleration of the object will be constant. So this is the graph of the motion of a different object.
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Which is the best example of a scientific discovery resulting from new technology?
the discovery that elements can be grouped in a table on the basis of their properties
the discovery of atomic structure which led to the development of an electron microscope
the discovery of the structure of DNA, which occurred as the result of an X-ray image of a DNA molecule
the discovery that plant pigments can be separated and identified by using paper and a solvent
third
Explanation:
i think so because finding structure of dna can help a lot for well being of human being
A 55.0 kg runner who weighs 539.0 N is accelerating at 3.2 m/s2. After 2
seconds, she reaches a speed of 6.4 m/s. What is her momentum at this
point?
A. 176.0 kg-m/s
B. 8.6 kg-m/s
C. 352.0 kg-m/s
D. 84.0 kg-m/s
Answer:
C. 352.0 kg-m/s
Explanation: Took the test on APEX
Answer:
The answer is C. 352.0 kg-m/s
The lava lamp has a light bulb as a heat source at its base. The lamp contains a colored, waxy fluid that can be observed moving in clumps through a clear liquid. A lava lamp filled with orange blobs lit from below. As the clump of colored fluid at the bottom of the lava lamp reaches the top, which has increased? its density its temperature the kinetic energy of its molecules the space between its molecules.
As the clump of colored fluid at the bottom of the lava lamp reaches the top, Its temperature increases. Temperature directs to the hotness or coldness of a body.
What is temperature?Temperature directs to the hotness or coldness of a body. In clear terms, it is the method of finding the kinetic energy of particles within an entity. Faster the motion of particles more the temperature.
Temperature is essential in all areas of Science right from Physics to Geology and also it is important in most parts of our everyday life.
The clump of colorful fluid at the bottom of the lava lamp rises to the top because the clump, as the heavier liquid, absorbs heat and expands, becoming less dense and rising.
Due to this the temperature is increasing.Hence As the clump of colored fluid at the bottom of the lava lamp reaches the top, Its temperature increases
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Answer:
A density
Explanation:
all the others were wrong smh had to redo quiz after all
A penny falls from a windowsill which is 2.5 m above the sidewalk
Answer:
The answer is 22.14 meters per second
Explanation:
I gotchu brother
Base your answers to questions 4 and 5 on the informa- tion below
A lightweight sphere hangs by an insulating thread. A student wishes to determine if the sphere is neutral or electrostatically charged. She has a negatively charged hard rubber rod and a positively charged glass rod. She does not touch the sphere with the rods, but runs tests by bringing them near the sphere one at a time.
4. Describe the test result that would prove that the sphere is neutral
5. Describe the test result that would prove that the sphere is positively charged.
If the sphere is positively charged, the positive rod is repelled by the sphere while the negative rod is attracted by the sphere.
What is an electrical charge?An electrical charge can be positive or negative. From the laws of electrostatics, unlike charges attract while like charges repel. As such the effect observed when the rods are individually brought near the sphere will decide the charge on the sphere.
If the sphere is neutral, there is no effect observed when each rod is brought near the sphere. If the sphere is positively charged, the positive rod is repelled by the sphere while the negative rod is attracted by the sphere.
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How does the balls potential energy relate to the amount of work needed to place the ball on the 2 m shelf
Potential Energy of the ball = Amount of work needed to place the ball on the 2 m shelf = [tex]19.62 \times m = f(mass \; of\; balls )[/tex]
By the definition of work
[tex]Work = F.ds......(1)[/tex]
Let us consider a ball having mass = [tex]m[/tex]
Weight of the ball = [tex]mg[/tex]
Equation (1) defines Work.
If the work is to be done against acceleration due to gravity of earth
then the work needed to keep the ball at height [tex]h[/tex] is given by equation (2)
[tex]Work = mg\times h[/tex]......... (2)
Also the Potential Energy of mass m kept at height h is given by equation (3)
[tex]Potential \; Energy = mgh[/tex]......(3)
given
The height of the shelf = 2 m
So From Equation (1) and (2) we get
[tex]Work = Potetial Energy = 19.62\times m \; Joule[/tex]
So both Work and Potential Energy are equal in this case and function of masses of the balls.
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You look down an old well, cannot see the bottom, and mutter to yourself "Oh well!". In order to estimate the depth of the well, you then drop five stones and record the time for each to impact: 2.19s, 2.30s, 2.26s, 2.29s, and 2.27s. What is the best estimate of the depth of the well? Explain your reasoning.
Answer:
The best estimate of the depth of the well is 2.3 sec.
Explanation:
Given that,
Record time,
[tex]t_{1}=2.19\ sec[/tex]
[tex]t_{2}=2.30\ sec[/tex]
[tex]t_{3}=2.26\ sec[/tex]
[tex]t_{4}=2.29\ sec[/tex]
[tex]t_{5}=2.27\ sec[/tex]
We need to find the best estimate of the depth of the well
According to record time,
We can write of the record time
[tex]t_{1}=2.19\approx 2.2\ sec[/tex]
[tex]t_{2}=2.30\approx 2.3\ sec[/tex]
[tex]t_{3}=2.26\approx 2.3\ sec[/tex]
[tex]t_{4}=2.29\approx 2.3\ sec[/tex]
[tex]t_{5}=2.27\approx 2.3\ sec[/tex]
Here, all time is nearest 2.3 sec.
So, we can say that the best estimate of the depth of the well is 2.3 sec.
Hence, The best estimate of the depth of the well is 2.3 sec.
A 120V Microwave uses 8A of current. It runs for 15 hours over the course of a month. If electrical energy costs $0. 11/KWh, what does it cost to run the microwave for the month
Answer:
1 kw-hr = 1000 w * 3600 sec = 3.6E6 Joules
E = P t = 120 J/C * 8 C/sec * 3600 sec /hr * 15 hr = 5.18E7Joules
where E is energy used by microwave
5.18E7 / 3.6E6 * .11 = $1.58 cost to run for 15 hrs
a. What is the S.l unit of acceleration?
m
m/s o
m/s2
N
Explanation:
The SI unit of acceleration is the metre per second squared (m s−2); or "metre per second per second", as the velocity in metres per second changes by the acceleration value, every second.
PLEASE HURRY! :) TEN POINTS + BRAINLIEST TO 1ST CORRECT ANSWER!
What occurs when someone places an ice pack on an injured ankle? Conduction causes the ice pack to lose thermal energy. Conduction causes the ankle to gain thermal energy. Cold from the ice pack is transferred to the ankle. Heat from the ankle is transferred to the ice pack.
Answer:
I think it is C. cold from the ice pack is transferred to the ankle
Explanation:
Hope I helped if I did plz give me brainiest thanks <3
Answer:
Hello
well u have already mentioned the answer in the question itself.....
Conduction causes the ice pack to lose thermal energy. Conduction causes the ankle to gain thermal energy. ... Heat from the ankle is transferred to the ice pack.
When gas in a container expands to three times its volume at constant temperature, the gas pressure?
A) is one third.
B) is one ninth.
C) triples.
D) remains the same
Answer:
A) is one third
because according to Boyle's law pressure is inversely proportional to the volume
All of the following are types of schizophrenic disorders except __________ schizophrenia. A. Catatonic B. Paranoid C. Differentiated D. Disorganized.
All of the following are types of schizophrenic disorders except Disorganized.
What is schizophrenia?Schizophrenia is a chronic brain disease that affects fewer than 1% of the population in the United States. Symptoms of schizophrenia include delusions,
Hallucinations, disordered speech, difficulty thinking, and a lack of desire. Most symptoms of schizophrenia can be considerably improved with therapy, and the risk of recurrence can be reduced.
Despite the fact that there is no cure for schizophrenia, research is leading to new and safer therapies.
Experts are also examining genetics, performing behavioral studies, and utilizing modern imaging to examine the structure and function of the brain to figure out what causes the condition.
These methods carry the prospect of developing new and more effective treatments.
All of the following are types of schizophrenic disorders except Disorganized.
Hence all of the following are types of schizophrenic disorders except for Disorganized.
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Answer:
C.
Explanation:
I got it right
jana is drying her hair using 120 v source of power with a current of 12.5A. How many watts of power is her hair dryer using
Hi there!
Recall the following equation:
[tex]\large\boxed{P = IV}[/tex]
P = Power (W)
I = Current (A)
V = Voltage (V)
Plug in the given values to solve for power:
[tex]P = 120 * 12.5 = \boxed{1500 W}[/tex]
(c) A moving train has a kinetic energy of 8.1 x 10(power of 6)J.
The train makes an emergency stop.
It decelerates to rest in a distance of 270 m.
(i) Calculate the average friction force provided by the brakes.
answer
the friction force provided by the brakes is 30000 N.
What is friction force?Friction force is the force that opposes the motion between two bodies in contact.
To calculate the average friction force provided by the brakes, we apply the formula below.
Formula:
K.E = F'd............. Equation 1Where:
K.E = Kinetic energy of the trainF' = Friction force provided by the brakesd = distanceMake F' the subject of the equation
F' = K.E/d............ Equation 2From the question,
Given:
K.E = 8.1×10⁶d = 270 mSubstitute these values into equation 2
F' = (8.1 ×10⁶)/270F' = 30000 NHence, the friction force provided by the brakes is 30000 N
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An object with a mass of 2kg accelerates 3.5m/s2, what is the amount of force being applied to it?
Answer:
Force = 7N
Explanation:
Force = Mass x Acceleration = 2 x 3.5 = 7N
PLEAS HELPM ME FASTTT MARKING PERIOD IS ABOUT TO END.
Most areas have two high and two low tides each day, this is called ___________.
Question 2 options:
gravity
semi-diurnal
low tide
Answer:
the answer is semidiurnal
Answer:
I think it is semi-diurnal :)
Hope this helps!!
Have a great day!!
Please rate and mark brainliest!!
Which features would the scientists most likely see for samples from multicellular organisms
Answe
common checks
Explanation:
What best describes the pitch that juan hears? the pitch remains constant as the ambulance moves toward and then away from juan. the pitch increases and decreases in a repeated pattern as the ambulance passes juan. the pitch drops to a lower pitch once the ambulance passes by juan. the pitch increases to a higher pitch once the ambulance passes by juan.
The correct answer is "the pitch drops to a lower pitch once the ambulance passes by Juan".
What is the Doppler effect?When there is relative motion between the source and the listener, the Doppler effect causes the frequency to rise or decrease. The frequency determines the pitch. When the frequency rises, the pitch rises with it.
When the source and the listener get closer to each other, the frequency rises. There is a reduction in frequency as the source and listener move away from each other.
Juan is standing on the street in the provided situation. When an ambulance approaches Juan and then passes by, the pitch dips to a lower level.
Hence "The pitch decreases to a lower pitch once the ambulance passes by Juan," is the right answer.
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Answer:
Explanation:
c.the pitch drops to a lower pitch once the ambulance passes by Juan
A car moves at 72 km/h and car B moves at 90 km/h, approach each other. A car honked with a frequency of 650 Hz. If the speed of the sound waves in the air is 350 m/s, then what is the frequency of sound heard by the driver of car B from car A?
Givens:
Equation:
Solution:
Unit:
Substitution:
The frequency of the sound heard by the driver of car B from car A is mathematically given as
F=738.6hz
What is the frequency of the sound heard by the driver of car B from car A?Question Parameters:
A car moves at 72 km/h and car B moves at 90 km/h, approaching each other. A car honked with a frequency of 650 Hz
the speed of the sound waves in the air is 350 m/s,
Generally, the equation for the Frequency is mathematically given as
[tex]F=f'(\frac{v+vob}{v-vsource})[/tex]
Therefore
[tex]F=650(\frac{350+25}{350-20})[/tex]
F=738.6hz
In conclusion, the frequency of the sound is
F=738.6hz
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A 600 W electric heater is connected to a 120 V source. Calculate its current.
Question :-
A 600 Watt electric heater is connected to a 120 Volt source . Calculate its Current .Answer :-
Current is 5 Ampere .Explanation :-
As per the provided information in the given question, we have been given that the Power is 600 Watt , Voltage is given as 120 Volt . And, we have been asked to calculate the Current .
Now, for calculating the Current , we will use the Formula :-
[tex] \bigstar \: \: \boxed{ \sf{ \: Current \: \: = \: \: \dfrac{ \: Power \: }{Voltage} \: }} \\ [/tex]
Therefore, by Substituting the given values in the above Formula :-
[tex] \dag \: \: \: \sf {Current \: \: = \: \: \dfrac{\: Power \:}{Voltage}} \\ [/tex]
[tex] \longmapsto \: \: \sf {Current \: \: = \: \: \dfrac {\: 600 \:}{120}}[/tex]
[tex] \longmapsto \: \: \bf {Current \: \: = \: \: 5 \: Ampere} [/tex]
Hence :-
Current = 5 Ampere .[tex] \underline {\rule {89pt}{4pt}} \: \: \underline {\rule {89pt}{4pt}} [/tex]
3. A boy does 15 Joules of work to push a cart covering 2.5 meters. How much force did he use?
Given:
Solve For:
Solution:
Answer: 6 N
Explanation: W (WORK) = 15 JOULES
S (DISTANCE) = 2.5 m
F (FORCE) = ?
BY USING FORmULA OF WORK DONE
W = F.S
F =W/S
F = 15/2.5
F = 6 N