The student that gave the most precise measurement is student 2.
What is a precise measurement?A precise measurement is one that is close together especially when we have a replicate measurement. The measurements that are close together are said to be presence. A measurement is accurate when the measurement is quite close to the true value. Precision ad accuracy are very important in a measurement.
In this case, let us consider the measurement of each student;
Student 1 reported 3.6 kgStudent 2 reported 3.5 kgStudent 3 reported 3.12 kgStudent 4 reported 3.476 kgWe can see that the student that gave the most precise measurement is student 2.
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Four people participate in a rope competition. Two of them pull the rope right exerting forces of magnitude 330 N and 380 N. The other two pull left exerting forces of magnitude 320 N and 410N.
A rope competition is played out between four participants. They both pull on the rope to the right while producing forces between 330 N and 380 N. The other two pull to the left with forces of 320 N and 410 N, respectively.
T2 = 250 and T1 = 250.57 [N] .57[N]
In order to create a free body diagram with all the forces acting on the body, we must first extract all the information they provide about the issue.
The free body diagram and associated forces are shown in the accompanying figure.
The T1 and T2 forces can be found by adding up the forces on the Y-axis; these forces are equal because they are a precondition for the problem. Therefore, this equation can be solved.
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Four point charges lie on the vertices of a square with side length L. Two adjacent vertices have charge Q, while the other two have charge -Q. What is the magnitude of the electric field at the center of the square?
Answer:
hope it help
Explanation:
E1=2Ecosθ=[x2+l2]3/22kq(l) alongAC;E2=2Ecosθ=[x2+l2]3/22kq(l) alongDB
So, E1⊥E2. Net field is
E0=E12+E22=[x2+l2]3/222kql=2πε0[x2+l2]3/2ql
The magnitude of the electric field at the center of the square is[tex]√(2 * k * |Q| / L^2).[/tex]
What is electric field?Electric field is a physical field that surrounds electrically charged particles and exerts force on other charged particles within the field. It is defined as the force per unit charge experienced by a test charge in the field.
The magnitude of the electric field at the center of the square is given by the formula:
[tex]E = kQ/2L^2[/tex]
where k is the Coulomb constant.
The distance from the center of the square to each vertex is [tex]L/√2.[/tex]
The electric field due to the charges at the vertices with charge Q is:
[tex]E1 = kQ/(L/√2)^2 = 2kQ/L^2[/tex]
The electric field due to the charges at the vertices with charge -Q is:
[tex]E2 = k(-Q)/(L/√2)^2 = -2kQ/L^2[/tex]
The net electric field at the center of the square is:
[tex]E = E1 + E2 = 2kQ/L^2 - 2kQ/L^2 = 0[/tex]
Therefore, the magnitude of the electric field at the center of the square is zero.
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The temperature of a 2.0kg block increases by 5C when 2000 J of thermal energy are added to the block. What is the specific heat of the block
Explanation:
Q=mc(T2-T1)
or
q = mcΔT ,
where m is the mass of the sample,
c is the specific heat,
and ΔT is the temperature change.
Q=2.0 × 2000 × 5
Q=20000J⋅kg −1 ⋅K −1
I hoped I helped pls rate as brainliest
How many forms of
energy associated
with a computer
you describe
Answer:
The computer uses 5 of these they are mechanical, sound, heat, light, and electric energy.
Explanation:
hope this helps
A TV takes in 600J of electrical energy and gives out 300J of light, 240J of sound and 60J of heat energy (be careful here!). Calculate the efficiency.
Answer:
90%
Explanation:
The energy efficiency formula runs like efficiency = useful energy output/energy input * 100%.
The energy output here is 600 (300+240) and the input is 600J. However since its heat energy of 60 you won't include that. So you will input the output and the energy input in the formula and you will get 540/600=0.9
So your answer is 90%.
Sorry if its confusing, have a good day! :D
An adventurous cliff jumper runs horizontally off a cliff at time t = 0. We can ignore air resistance.
Which graph best describes the cliff jumper’s vertical displacement over time?
THE ANSWER IS IN THE ATTACHMENT!
The graph C best describes the cliff jumper's vertical displacement as shown in the attachment.
The initial vertical velocity of the cliff jumper would be zero as the cliff jumper runs off the cliff horizontally. As he jumps off, he is subjected to gravitational pull. This increases his velocity with respect to time.
During some of the initial time, the displacement would be lesser as his velocity increases with increase in time. Also the graph is in the 4th quadrant because the vertical displacement is downwards ( Negative ) as the time increases ( Positive ).
Therefore, the graph with a curve that lies in 4th quadrant with a lesser initial displacement is the correct answer.
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A 50-cm-long spring is suspended from the ceiling. A 210 g mass is connected to the end and held at rest with the spring unstretched. The mass is released and falls, stretching the spring by 16 cm before coming to rest at its lowest point. It then continues to oscillate vertically.
The value of spring constant (k) is 25 N/m.
Conservation of energy, potential energy of a stretched spring, gravitational potential energy, frequency of oscillation in a spring coupled to a mass, and variation of acceleration due to gravity with altitude are the principles necessary to answer the given problem.
To begin, use energy conservation to equal change in gravitational potential energy on mass attached to spring and elastic potential energy of stretched spring. Then, in the equation, substitute the specified numbers and solve for the spring constant. Then, calculate the amplitude by taking half of the value of spring stretching from equilibrium, and the frequency of oscillation by using the calculation for frequency of oscillation in a stretched string in terms of mass and spring constant.
Formula apply
U=mgh
U=1/2kx^2
putting the value of K ,x ,mass and g then
k is 25N/m
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How do you find the x and y components of a vector ?
Answer:
If you were given the vector in vectorial form, for example, <5,7>, then the first number (5) will always be the x component and the second number (7) is the y component.
In other cases, you are given the magnitude of the vector and the angle created by said magnitude with respect to the y or x axis. In these cases, you must use the magnitude and angle of the vector as if it was the hypotenuse of a right triangle and find the values of x and y as the legs of said triangle using the sine and cosine created by the magnitude of the vector and the value of said magnitude.
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This sentence explains the production and movement of energy in the sun and the flow of energy from the sun to Earth. Drag each item to the correct location. Answers may be used more than once. (2 points) Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse. Energy is released in the sun’s core through Response area. It then is transferred by Response area through the sun’s radiative zone to the conductive zone, where it is transferred to the sun’s surface by Response area. From the surface, energy from the sun is transferred to Earth by Response area.
The correct answer is nuclear fusion, radiation, and conduction.
It is a nuclear process in which energy is produced by colliding light atoms. It is the opposite of fission, which results in the disintegration of heavy isotopes. The sun and other stars produce light and heat through fusion.
According to the energy of the emitted particles, radiation is frequently classified as either ionising or non-ionizing. More than 10 eV is often carried by ionising radiation, which is sufficient to ionise atoms and molecules and rupture chemical bonds.
Conduction is an observable occurrence in all states of matter and is the process of transmitting energy through the motion of particles in touch with one another (solids, liquids and gases). Conductors are substances that permit conduction. Conduction is divided into three categories: conduction of heat, conduction of electricity, and conduction of sound.
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Resistance between opposite faces of a unit cube. Expressed in ohm-centimeters or ohms per cubic centimeter.
Resistivity is the resistance between opposite faces of a unit cube.
The electrical resistance of a conductor with a unit cross-sectional area and unit length is called resistivity. Resistivity is a distinctive attribute of any material that may be used to compare different materials based on how well they conduct electric currents. Low conductivity is indicated by high resistance.
The Greek letter rho is frequently used to represent resistance, which is numerically equivalent to the resistance R of a wire-like specimen, multiplied by its cross-sectional area A, and divided by its length l; RA/l. The ohm is the measurement of resistance. Units of ohm-centimeter can be used to represent resistance when lengths are measured in centimeters. The temperature of the material also affects the value of resistivity.
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The makers of brand A hand sanitizer want to prove that their sanitizer kills more bacteria than the other 4 leading brands of sanitizer. They organize 60 test subjects into 6 groups of 10 test subjects. The test subjects participate everyday for one week, the data for the experiment is shown below where the final average number of bacteria still remaining is given.
Table 1. Effectiveness of Hand Sanitizer on Bacteria
[See Attached]
Please develop a CONCLUSION for this experiment.
Based on the results of the experiment, it can be concluded that the claim by Brand A that their sanitizer kills more bacteria than the other 4 leading brands of sanitizer is true.
What is an experiment?An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried.
The experiment is the foundation of the scientific method, which is a systematic means of exploring the world around us.
Experiments takes place in laboratories, but can also be performed anywhere at any time.
There are some steps in the scientific methods which includes:
Make observations.Formulate a hypothesis.Design and conduct an experiment to test the hypothesis.Evaluate the results of the experiment.Accept or reject the hypothesis.If necessary, make and test a new hypothesis.Considering the data table from the experiment:
The results of this study concur with brand A goals as hand sanitizers producers as product effectiveness has improved over time. The performance of brands A has indicated improved effectiveness as their claims has been found true with respect to other manufacturers of the sanitizer. This study showed that brand A hand sanitizers were tested and found more effective against selected brands.
In conclusion, the results of the experiments showed that in the comparison between the brands of hand sanitizers, brand A were most effective.
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1. You are part of a new team of colleagues at work and you are trying to remember everyone's
name. What part of the brain would be responsible for making sure you know who everyone is?
a. Hippocampus
b. Hypothalamus
c. Amygdala
d. Thalamus
The part of the brain that would be responsible for making sure you know who everyone is Hippocampus; option A
What is the brain?The brain is the organ in the body which controls the function of other organs in the body.
The brain is made up of cells called neurons.
The brain is divide into three main parts namely:
the cerebrum,the brainstem, andthe cerebellumThe cerebrum consists of two cerebral hemispheres the outer layer called the cortex.
The brainstem consists of the medulla, pons, and midbrain.
The cerebellum consists of three lobes the anterior lobe, the posterior lobe and the flocculonodular lobe.
The hippocampus is part of the temporal lobe which controls recognition and dentification of people.
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Sasha is measuring the rate of heat energy given off by an incandescent light bulb. The theoretical value is 55.4 watts. Her measurement has a 2.17 error. Which of the following values may have been Sasha's measurement? (Choose all that apply)
A. 1.20 watts
B. 54.2watts
C.56.6watts
D.53.23watts
E. 57.57watts
The measurement of Sasha, given the data from the question is 57.57 watts (Option E)
How to determine Sasha's measurementThe following data were obtained from the question:
Theoretical value = 55.4 wattsAbsolute error = 2.17 wattsSasha' measurement =?To obtain Sasha's measurement, we shall determine the experimental measurement. This is illustrated below:
Absolute error = Experimental measure - theoretical measurement
2.17 = Experimental measure - 55.4
Collect like terms
Experimental measure = 2.17 + 55.4
Experimental measure = 57.57
Thus, we can conclude that Sasha' measurement is 57.57 watts (Option E)
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You drive your car 2 km to the gas station, 4 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20
min.
What is your VELOCITY in m/s?
0m/s
-9 m/s
-3 m/s
+4 m/s
Answer:
+4m/s
Explanation:
You drive your car 2 km to the gas station, 4 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20 min, then velocity is 4 m/s.
What is velocity?When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time.
Uniform motion an object is said to have uniform motion when object cover equal distance in equal interval of time within exact fixed direction. For a body in uniform motion, the magnitude of its velocity remains constant over time.
Given in the question you drive your car 2 km to the gas station, 4 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20 min.
The velocity in m/sec is given as 4 m/s.
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Two birds are flying south for the winter. Bird 1 reaches its destination in 6 hours, while bird 2 reaches its destination in 12 hours. If bird 2 covers twice as much distance as bird 1, what is the ratio of their average speeds (bird 1/bird 2)?
1.0
0.8
1.2
0.5
The correct answer is option ( A) the ratio of their average speeds (bird 1/bird 2) is 1.0
velocity = distance / Time
Let us assume distance covered by Bird 1 = d
case 1 (Bird 1) :-
time = 6 hours
velocity(Bird1) = d/6 = 0.167*d
case 2 (Bird 2) :-
time = 12 hours
distance is twice of Bird 1 = 2d
velocity(Bird2) = 2d/12 = 0.167*d
now, velocity of Bird1/Bird2 = (0.167*d)/(0.167*d) = 1.0
So,velocity of (Bird1/Bird2) is 1.0 .
Average velocity / Average speed = Total displacement / Total distance. Remember that the numerator is less than or equal to the denominator. As a result, the ratio is always equal to or less than one. Distance traveled divided by time taken is the most commonly used formula for calculating average speed. The other formula is to add the initial and final speeds together and divide by two.
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How is gamete division related to chromosomal abnormalities?
Extensive gamete division causes chromosomal abnormalities.
• Failed gamete division causes chromosomal abnormalities
• Uneven gamete division causes chromosomal abnormalities.
• Even gamete division causes chromosomal abnormalities.
The uneven gamete division causes chromosomal abnormalities.
What is a Gamete?A gamete is a fully developed reproductive or sex cell with haploid chromosomes that has the capacity to mate with another haploid gamete to create a diploid zygote. The fusion (or combining) of two gametes, namely a male and a female gamete, results in the zygote. Fertilization is the process through which two gametes combine to form a zygote.
One of the gametes is typically bigger and non-motile, which is characteristic. It is sometimes referred to as an ovum or an egg cell. The second gamete cell is smaller and motile. It is also known as a sperm cell or a male gamete. In humans, each gamete has 23 chromosomes, and when they fuse, a diploid zygote with 46 chromosomes is created. These reproductive cells are created in the gonads, or reproductive organs, of the male and female animals. The male gametes in seed-bearing plants are the pollen, whereas the female gametes are housed in the plant's ovules. The gamete in plants, however, is not invariably a haploid cell.
Hence, Uneven gamete division causes the chromosomal abnormalities.
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The outline of a partial periodic table is shown below.
You are making observations of an unknown metal. In which section of the periodic table should the unknown metal be located? a. Section 1 b. Section 2 c. Section 3 d. Section 4
Answer:
section 2
Explanation:
section 2 contains Alkali, Alkaline, Transition, and Post-transition metals
The speed of a train increases from 100 km/hr to 250 km/hr in 5 minutes. What is its acceleration?
Answer:30 km/hr2 is the exal
Explanation:
A 200 kg car has a constant velocity of 40 m/s. Suddenly the driver steps on the
brakes, and the force of friction that slows down the car is 1,000 N. What is the
acceleration of the car?
Answer:
acceleration =Force/mass
a=1000/200=5m/s
does distance have direction? does displacement have direction?
Answer:
Below
Explanation:
Distance is considered a scalar measurement, meaning it does not have direction associated with it.
Displacement is a vector measurement. This means that direction is important and changes the value depending on which way it goes
A baseball is popped straight up with an initial speed of 25.9 meters per second. What is the ball's velocity after it has traveled a total distance of 50.0 meters? Include units in your answer.
The ball's velocity after it has travelled a total distance of 50.0 meters is 40.63 m/s
Data obtained from the questionThe following data were obtained from the question:
Initial velocity (u) = 25.9 m/sAcceleration due to gravity (g) = 9.8 m/s²Height (h) = 50 mFinal velocity (v) = ?How to determine the final velocityWe can obtain the final velocity as illustrated below:
v² = u² + 2gh
v² = 25.9² + (2 × 9.8 × 50)
v² = 670.81 + 980
v² = 1650.81
Take the square root of both sides
v = √1650.81
v = 40.63 m/s
Thus, the velocity after travelling 50 m is 40.63 m/s
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A tank of oxygen has 125 kPa of pressure. The pressure is increased to 200 kPa and the final volume is 0.5 L. What was the initial volume?
According to the given data initial volume =0.667 L
Why is it called Boyle's law?Boyle observed that the product of the pressure and volume are observed to be nearly constant. For a perfect gas, the result of volume and pressure is a precise constant. Boyle's Law is the name given to the relationship among pressure and volume in his honor.
Who discovered Boyle's law?Boyle was a modern chemical pioneer in the 17th century, best known for his law of gases. Robert Boyle (1627–1691) is credited with discovering the renowned Boyle's law, which states that a gas's volume decreases with rising pressure and vice versa
Briefing:Since the change occurs at constant temperature (i.e. an isothermal change), Boyle's law applies,
i.e. p[tex]_1[/tex]V[tex]_1[/tex] = p[tex]_2[/tex]V[tex]_2[/tex] where p[tex]_1[/tex] = 125 kPa, p[tex]_2[/tex] = 200 kPa and V[tex]_2[/tex]=0 .5L
Hence, (150)V[tex]_1[/tex] = (200)(0.5)
from which, volume V[tex]_1[/tex] = 200×0.5/150=0.6667L
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Is the following equation dimensionally correct?
P=√pgh.
where
P is pressure in units of Kg.m/s²/m².
p is density in units of Kg/m³.
g is gravitational acceleration in units of m/s².
h is height in units of m.
The correct answer is :
P = ρgh yields the hydrostatic pressure, which is accurate.
The pressure a liquid applies to nearby bodies when it is at rest is known as hydrostatic pressure.
Water at rest exerts a force known as hydrostatic pressure. It is caused by the water's continual pressure on the basement walls.
The force that blood applies to blood channel walls is a typical illustration of hydrostatic pressure.
Depending on the liquid's density ('ρ'), the height of the water column ('h'), and the acceleration caused by gravity ('g'), the hydrostatic pressure is indicated by the letter "P" of a liquid column.
Because of this, the parameters and the supplied equation P = gh are both accurate.
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Please refer to the picture.
The graph is displayed in the following attachment.
The graph shows that the answers to the problem are x = -1.2 and x = 1.7.
From the image, we may deduce that
The graph is displayed in the following attachment.
The graph shows that the answers to the problem are x = -1.2 and x = 1.7.
We must create the graph of the function for the given range of values based on the image (that is for values of x from -3 to 3)
We will first establish the function's table of values.
Values for the function x y -3 in a table 1.33 -2 2 -1 4 0 Definable
1 -4 2 -2\s3 -1.33
(The docx attachment provides a better view.)
Additionally, the function's graph (purple lines) is
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A reconnaissance plane flies 512 km away
from its base at 742 m/s, then flies back to its
base at 1113 m/s.
What is its average speed?
Answer in units of m/s.
Answer in units of m/s
The average speed of round trip is 1192.8 m/s
Average speed of the round trip is
2*994*1491/(994+1491)
= 1192.8 m/s
The overall distance the object covers in a given amount of time is its average speed. A scalar value represents the average speed. It has no direction and is indicated by the magnitude.The mean value of a body's speed over a period of time is its average speed. Since a moving body's speed is not constant over time and fluctuates, the average speed formula is required. The numbers of total time and total distance travelled can be used even with fluctuating speed.Learn more about average speed at:
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: list five Derived quantities
Answer:
pascal
energy,
power,
electric charge,
Explanation:
A force of 20 N gives an object an acceleration of 5 m/s^2.
A)What force would be needed to give the same object an acceleration of 1 m/s^2
B) what force would be needed to give it an acceleration of 10 m/s^2
The question can be solved using the principle of Newton's second law of Motion. Newton's second law of motion is often stated as F=ma, which means the force acting on an object is equal to the mass (m) of an object times its acceleration.
F=ma
According to the given data,
Force of 20N is applied to the object
acceleration of 5 m/s^2 is obtained on the object
From Newton's second law of motion,
F=ma
20N =m x 5
m=4kg
To obtain an acceleration of 1 m/s^2, the force required will be
F= ma
F= 4 X 1 = 4 N
To obtain an acceleration of 10 m/s^2, the force required will be
F=ma
F= 4 x 10
= 40 N
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One swimmer in a relay race has a 0.50 s lead and is swimming at a constant speed of 5.00 m/s. The swimmer has 44.0 m to swim before reaching the end of the pool. A second swimmer moves in the same direction as the leader. What constant speed must the second swimmer have in order to catch up to the leader at the end of the pool?
Answer:
See below
Explanation:
The lead swimmer will finish in 44 m / 5 m/s = 8.8 seconds
the second swimmer has to cover the 44 m PLUS the length he is behind
the first swimmer in the same amount of time
(44 m + 1/2 s * 5 m/s) / 8.8 s = 5.284 m/s
Carrie has experienced brain damage to her left hemisphere. She will most likely experience difficulty with which ability?
A) putting a puzzle together
B) recognizing faces
C)judging time and rhythm
D)understanding sarcasm and irony
How can urban or rural infrastructure play a role in a community recreation?
Urban or rural infrastructure can play an important role in a community recreation because these infrastructure is used by people of the community for the recreational purpose.
How can urban or rural infrastructure play a role in a community recreation?Urban Community:
The density of population and networks of activities, the cities contain publics buildings as well as government buildings which have organized religion, commerce, social interactions. So these peoples and the buildings provide the focus for communities.
The Urban infrastructure consists of gas distribution, urban transport, primary health services and many other things.
Rural Community:
Agriculture is the main fundamental need for the rural areas people which forms the basis of rural economy. A farmer has to perform various agriculture activities for which he needs the cooperation of his family and usually need a very large area for the farming.
So we can conclude that Urban or rural infrastructure can play an important role in a community recreation because these infrastructure is used by people of the community for the recreational purpose.
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