Answer:
2.8
Explanation:
it has stright angle line
How much force is exerted by one elastic band?
Answer:1651 J/kg for stretching and 6605 J/kg for twisting
Explanation:The rubber band has a mass of 1.09 grams. This puts the specific energy at 1651 J/kg for stretching and 6605 J/kg for twisting.
Answer:
2+2÷2×4÷5+4÷5+4_5_4
Which statement describes a question that can be answered by a scientific
investigation?
A. It is a question that can be answered by gathering other scientists'
opinions.
B. It is a question that can be answered by gathering data during an
experiment.
C. It is a question about a phenomenon of which no measurements
can be taken.
D. It is a question about the sequence of experimental steps.
Answer:
Its b
Explanation:
I just did this question
The question that can be answered by scientific investigation is that can be answered by gathering data during an experiment. Thus option B is correct.
What is scientific investigation?Investigation on a natural phenomenon or process to solve a scientific question or to solve a social or environmental issue by well designed experiments based on reasonable observations is called scientific investigation.
A scientific investigation includes, variables, hypothesis , observations, research methodology. Scientific experiments have to well designed to address all the outcomes of the observations and must be feasible to prove whether the hypothesis is true or not.
Scientific investigations cannot be conducted based on only opinions from scientists or scientific record. The data have to be collected through experiments conducted by well designed research methodology.
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In the early part of the 1900s, psychologists who broke down thought processes into their basic elements and analyzed them were called structuralists. What term might we use to describe
psychologists with similar interests today?
Behavioral
Cognitive
Gestalt
Humanistic
Social
Answer: Cognitive
Explanation:
Cognition can be defined as the process of obtaining the knowledge and learning through the experience, senses and thought. Many psychologists can have similar experiences of learning the psychological framework of the society or at the individual level. Thus this can be said that the cognitive psychologist may have similar interests.
Which of the following graphs shows a positive linear relationship with a
correlation coefficient, r, close to 1?
OA. Graph A
OB. Graph B
OC. Graph C
OD. Graph D
Graph C shows a positive linear relationship with a correlation coefficient, r, close to 1. Therefore, option C is correct.
A positive linear relationship refers to a direct relationship between two variables. in this type of relationship, an increase in one variable is associated with a proportional increase in the other variable.
In a positive linear relationship, when plotting the values of the two variables on a graph, the data points will tend to form a straight line that slopes upward from left to right. This indicates that there is a positive correlation between the variables, suggesting that they move in the same direction.
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Your question is incomplete, most probably the full question is this:
Which of the following graphs shows a positive linear relationship with a
the correlation coefficient, r, close to 1?
OA. Graph A
OB. Graph B
OC. Graph C
OD. Graph D
The image is attached below.
research suggests that humans can distinguish between _____ different hues.
Research suggests that humans can distinguish between approximately 7-10 million different hues.
This ability to perceive a wide range of colors is due to the presence of specialized cells in the eye called cones, which are responsible for color vision.
There are three types of cones, each of which is sensitive to a different range of wavelengths of light. These cones are referred to as short-wavelength (S) cones, medium-wavelength (M) cones, and long-wavelength (L) cones. By comparing the signals from these different types of cones, the brain is able to distinguish between different colors.
While humans are capable of distinguishing between a large number of different hues, there is considerable individual variation in color perception. Some individuals may have color vision deficiencies, which can make it more difficult to distinguish between certain colors.
In addition, cultural and linguistic factors can also influence color perception. For example, some languages have fewer color terms than others, which may affect the way that speakers of those languages perceive and categorize colors.
Overall, the ability to distinguish between different hues is a complex and multifaceted aspect of human perception that is influenced by a wide range of factors.
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Which point on the standing wave will not move?
Answer:
B
Explanation:
A P E X
a box having a mass of 5.00 kg is lifted 75.0 cm from the ground level to the top of a desk what is the gravitional energy of the box on the desktop
The box on the desk has a gravitational potential energy of 36.9 J.
How can you figure out the gravitational field strength using height and mass?Weight divided by mass equals the strength of the gravitational field. Different planets have various strengths of gravitational fields. The Moon's gravitational field is 1.6 N/kg strong.
The following formula must be used to get the box's gravitational potential energy: PE = mgh, where mgh is the height the box is raised to, m is the mass of the box, g is the acceleration caused by gravity, and PE is the gravitational potential energy.
The height must first be converted to metres:
h = 75.0 cm = 0.75 m
The values may now be plugged in, and PE can be solved:
PE = (5.00 kg)(9.81 m/s^2)(0.75 m) = 36.9 J
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determine how you would need to change the height of the piston to increase the pressure inside the cylinder while keeping the temperature constant?
If pressure has to be decreased the height of the piston needs to be increased which will increase volume of gas eventually decreasing the pressure.
What is pressure ?The thrust (perpendicular force on a surface) acting per unit area of a body is referred to as pressure. It can be stated mathematically as follows: Pascal is the SI unit of pressure (Pa). One Pascal is the amount of pressure one Newton of force applies to a square inch of space. Additionally, 1 P a = 1 N / m 2. In the International System of Units, pressure or stress is measured in pascals (Pa) (SI). It bears Blaise Pascal's name, a mathematician and physicist. Applied force of one newton (N) per square metre is equal to one pascal (P) (m2).
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the cassini-huygens spacecraft select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a landed on the planet mars. b flew past the planet jupiter and photographed its moons. c went into orbit around the planet saturn and dropped a probe into titan's atmosphere. d went into orbit around the planet jupiter.
The cassini-huygens spacecraft c went into orbit around the planet Saturn and dropped a probe into titan's atmosphere.
What is the spacecraft about?One of the most challenging space missions ever launched was Cassini-Huygens. The spacecraft was equipped with a wide range of potent instruments and cameras, allowing it to take precise measurements and in-depth pictures under a variety of atmospheric conditions and light spectra.
Cassini navigators used the stars to determine the position of their ship, just like early mariners did. The "optical navigation" images of Saturn's moons were captured by the spacecraft's cameras against a background of stars whose positions are well-known thanks to astronomical measurements.
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A mass of 2 kg accelerates at 4 m.s2. What unbalanced force acts on the mass?
Answer:
frictional force and applied force
Which of the statements below is a scientific claim and why?
1. Human Beings will never set foot on the moon.
2. Some of the laws that govern nature cannot be detected by scientists.
3. It is quite possible that in some other galaxy the laws of physics are fundamentally
different than the laws we are acquainted with in this galaxy.
Answer:
The correct option is;
2. Some of the laws that govern nature cannot be detected by scientists
Explanation:
The statement "some of the laws that govern nature cannot be detected by scientists" is a scientific claim because of the concept of the laws or the theories truth or realism
The art word 'scientific realism' refers to the world that cannot be observed with our natural given senses without an aid.
Ontic realism refers to the statement that the world that cannot be observed are independent from the entities that are in possession of minds, ideas, language conception
Therefore, according to the ontic realist consider the world to be made of unobservable structures and units that exist independent of the man.
A 0.98 kg ball is placed on a vertical 55.71 N/m spring that is compressed 43.14 cm. When the spring is released, how high above its starting point will the ball go?
Answer:
F = - K X
X = .4314 m compression of spring
F = 55.71 N/m * .4314 m = 24.03 N force to compress spring
E = 1/2 K X^2 energy of compressed spring
E = 1/2 55.71 N / m * (.4314 m)^2 = 5.184 Joules energy of spring
1/2 M V^2 = E energy imparted to ball
V = (2 E / M)^1/2 = 3.25 m/s max speed of ball
M g H = 1/2 M V^2 calculate height of ball after release
H = E / (M g) height above spring
H = 5.184 / (.98 * 9.80) = .540 m height to which ball rises
.540 + .4314 = .972 m height above compression point
An object is subject to a 84 Nm torque about a point when a
21 N of force is applied to a second point along the object's
length. How far apart are the two points
Answer:
d = 4[m]
Explanation:
Torque in physics is defined as the product of force by distance. This way you can use the following equation to calculate the torque.
\(T=F*d\)
where:
T = torque [N*m]
F = force [N]
d = distance [m]
Now replacing in the equation above.
\(84=21*d\\\\d= 4[m]\)
Một đoàn tàu đang chuyển động với vận tốc v0 =72km/h thì hãm phanh chuyển động chạm dần đều sau 10 giây đạt vận tốc v1= 54km/h hỏi
Sau bao lâu kể từ lúc hãm phanh thì tàu đạt v = 36km/h và sau bao lâu thì dừng hẳn
Answer:
I don't understand ,I'm sorry
brandon is on one side of a river that is 80 m wide and wants to reach a point 200 m downstream on the opposite side as quickly as possible by swimming diagonally across the river and then running the rest of the way. find the minimum amount of time if brandon can swim at 2 m/s and run at 4 m/s.
Answer:
v1 = 2 mph = .893 m/s
v2 = 4 mph = 1.786 m/s v2 = 2 v1
T = L / v1 + (200 - x) / v2
Where T = total time and L is the distance swum followed by distance x
T = 2 L / 2 v1 + (200 - x) / 2 v1
2 v1 T = 2 L - 200 - x rearranging
2 v1 dT / dt = 2 dL / dt - dx / dt = 0 setting dT / dt = 0
2 dL / dt = dx / dt
dL / dx = 1/2
Now sin θ = x / L = 1/2
So sin 30 = 1/2 and θ = 30 deg
x = 80 tan θ = 80 * .577 = 46.2 m
200 - x = 153 .8 m
t1 = 46.2 / .893 = 51.7 sec
t2 = 153.8 / 1.786 = 86.1 sec
T = 51.7 + 86.1 = 138 sec
The mass of Venus is 81.5% that of the earth, and its radius is 94.9% that of the earth. Compute the acceleration due to gravity on the surface of Venus from these data.
To compute the acceleration due to gravity on the surface of Venus, we can use the formula for gravitational acceleration:
acceleration due to gravity = (G * mass of planet) / (radius of planet^2)
Given that the mass of Venus is 81.5% that of the Earth, we can calculate the mass of Venus as follows:
mass of Venus = (81.5/100) * mass of Earth. Similarly, the radius of Venus is 94.9% that of the Earth, so we can calculate the radius of Venus as follows:
radius of Venus = (94.9/100) * radius of Earth
Now, substitute these values into the formula for gravitational acceleration:
acceleration due to gravity on Venus = (G * mass of Venus) / (radius of Venus^2)
Finally, calculate the acceleration due to gravity on Venus using the given values and the formula.
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Symptoms of excessive stress include all of the following EXCEPT:
Answer:
Symptoms of excessive stress include all of the following EXCEPT: increased energy level.
Which layer of earth is a solid rock?
Answer:
Crust
Explanation:
Two people try to lift a heavy box. Jack pulls upward with a 100-newton
force. Jill pulls upward with a 50-newton force, but neither person moves the
box.
Compare the amount of work done on the box by Jack and Jill.
OA) Jack did twice as much work as Jill.
OB) Jack did fifty times more work than Jill.
OC) Jack and Jill did the same amount of work.
Answer:
A ( Jack did twice as much work as Jill
Explanation:
3.) using calories, calculate the how much heat 32.0 g of water absorbs when it is heated from 25.0oc to 80.0oc. how many joules is this?
The specific heat capacity of water is 1 calorie per gram per degree Celsius. This means that 1 gram of water will absorb 1 calorie of heat for every 1 degree Celsius increase in temperature.
In this case, we have 32.0 grams of water that is heated from 25.0 degrees Celsius to 80.0 degrees Celsius. The change in temperature is therefore 80.0 - 25.0 = 55.0 degrees Celsius.
The amount of heat absorbed by the water is therefore 32.0 x 55.0 = 1760 calories.
To convert calories to joules, we can use the following conversion factor:
1 calorie = 4.184 joules
Therefore, the amount of heat absorbed by the water in joules is 1760 x 4.184 = 7374 joules.
Therefore, the answer to your question is that 32.0 grams of water absorbs 7374 joules of heat when it is heated from 25.0 degrees Celsius to 80.0 degrees Celsius.
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what is the strength of an electric field that will balance the weight of a proton? express your answer in newtons per coulomb to two significant figures.
The strength of an electric field that will balance the weight of a proton is 1.6 x 10^-18 N/C.
The strength of an electric field that will balance the weight of a proton is given by the Coulomb force formula which is F=Eq. Therefore, the electric field strength that balances the weight of a proton is given by:
E=qg
where E is the electric field strength, q is the charge of the proton, and g is the acceleration due to gravity.
Electric field strength (E) = qg
From the Coulomb's law, we know that, q = e = 1.60 x 10^-19 C
Also, the weight of the proton (F) is given by:
F = mg
where m is the mass of the proton and g is the acceleration due to gravity.
Therefore, the value of g is 9.81 m/s^2
Therefore,
F = m * g = (1.67 x 10^-27 kg) * (9.81 m/s^2) = 1.64 x 10^-26 N
Therefore, the electric field strength that balances the weight of a proton is:
E=qg = (1.60 x 10^-19 C) * (9.81 m/s^2) = 1.57 x 10^-18 N/C
Approximately, the electric field strength is 1.6 x 10^-18 N/C
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A spring with constant 559 N/m is 0.14 meters long when not stretched or compressed. You compress the spring until it is 0.07 meters long. How many joules of elastic potential energy are stored in the compressed spring
Answer:
1.46755 Joules
Explanation:
Applying,
E = 1/2ke²......................... Equation 1
Where E = Elastic potential energy of the spring, k = spring constant, e = extension
From the question,
Gieven: k = 559 N/m, e = (0.14-0.07) meters = 0.07 meters
Substitute these values into equation 1
E = 1/2(599×0.07²)
E = 2.9351/2
E = 1.46755 Joules
3. The average human walks at a speed of 5 km per hour. If your PE teacher asks you to
walk for
40 minutes in
gym class, how far would you walk (km)?
The average human walks at a speed of 5 km per hour. If your PE teacher asks you to walk for 40 minutes in gym class, you would walk for 3 Km.
What is Average speed?
The average speed is the displacement of a particle divided into a time in which the displacement occurs. Instead, instantaneous speed is the limit of the average speed as the time interval approaches zero.
Usually,
Speed = Distance/ Time
Assuming you also walk with the average human walking speed of 5 km/h. We know the above formula of speed and now making distance the subject, distance is a product of speed and time.
Here, time is 40 minutes and if expressed in hours can be converted as,
40/60 = 0.6 hours.
Distance = 5 × 0.6
= 3 km
Thus,the average human walks at a speed of 5 km per hour. If your PE teacher asks you to walk for 40 minutes in gym class, you would walk for 3 Km.
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what is the si base unit used for measuring luminous intensity
Hi! The SI base unit used for measuring luminous intensity is the candela (cd).
The terms "SI," "unit," and "intensity" refer to the International System of Units (SI) as the standard for measurement, the specific unit being discussed, and the property being measured, which in this case is luminous intensity.
The intensity I, of light received at a source, varies inversely as the
square of the distance d, from the source
→ That means I × d² = k, where k is the constant of variation
∴ I × d² = k
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How does work affect energy between objects so it can cause a change in the form of energy?
O Work transfers energy
O Work changes energy
O Work increases energy
O Work decreases energy
Answer:
transfers
Explanation:
What allows negative feedback to control a system
Answer:
The system has parts that sense the amount of output, allows negative feedback to control a system
Explanation:
Car A has a mass of 2000 kg and is going 28 m/s east.
Car B has a mass of 4000 kg and is going 13 m/s west.
What will be the momentum of both cars together after the collision?
How much work is done in launching the object?
A) 9.80 kg m/s^2
B) 19.6 J
C) 9.8 J
D) 19.6 N
9.8 J of work done is required to launch the item (Option C).
To determine the work done in launching the object, we can use the formula:
Work = Force x Distance x Cos(theta)
where theta is the angle between the force vector and the direction of motion. In this case,
since the force is applied in the same direction as the motion of the object, theta is 0 degrees, and cos(theta) is 1.
Substituting the given values, we get:
Work = 19.6 N x 0.50 m x 1 = 9.8 J
Therefore, the work done in launching the object is 9.8 J (Option C).
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Complete question:
Question asked: how much work is done in launching the object?
Information in the passage included: 1.00 kg object initially at rest. The student applies a force of 19.6 N through a distance of .50 m to propel the object straight upward.
How does the magnitude of the force depend on the magnitude (absolute value) of charge 1 and charge 2.
Answer:
Product
Explanation:
The force between two charges is given by :
\(F=\dfrac{kq_1q_2}{r^2}\) ...(1)
Where
k is electrostatic constant
q₁ and q₂ are charges
r is the distance between charges
From equation (1), it is clear that the magnitude of the force is directly proportional to the product of charges.
plzzzz help it for civics
Answer:
A : the colonists dumped tea in Boston Harbor