Which statements explain why theories change over time? Check all that apply. Scientists change the definition of theory to have their ideas accepted. New information and technology may be developed that influence the theory. Theories change with each new generation of scientists. New experimental methods provide new information. Theories may or may not be supported by new information.
Answers
The theories change over time because new information and technology may be developed that influence the theory. Therefore, option B is correct.
Why theories change over time ?
As new information and perspectives become available, established theories may be changed or refuted. If a new or modified theory explains all the old theory did and then some, scientists are likely to accept it.
When fresh data emerges that refutes an existing theory, scientific theories can be revised or replaced. All scientific theories are founded on observable, testable data, and they can be changed when new information is found that contradicts the present idea.
When certain features of a hypothesis are refuted by fresh experimental data, a theory might be altered in science.
Thus, option B is correct.
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Final answer:
Theories change over time due to new information, technology, and the perspectives of new generations of scientists.
Explanation:
Theories change over time for several reasons. First, new information and technology may be developed that influence the theory. For example, advancements in experimental methods can provide new information and lead to the refinement or modification of theories. Additionally, theories may change with each new generation of scientists as they bring new perspectives and ideas. It is important to note that theories may or may not be supported by new information, and scientists do not change the definition of theory to have their ideas accepted.
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Related Questions
A race car travels on a circular track at an average rate of 125 mi/h. The radius of the track is 0.320 miles. What is the centripetal acceleration of the car? 391 mi/h2 40.0 mi/h2 5,000 mi/h2 48,800 mi/h2
A Hall-effect probe to measure magnetic field strengths needs to be calibrated in a known magnetic field. Although it is not easy to do, magnetic fields can be precisely measured by measuring the cyclotron frequency of protons. A testing laboratory adjusts a magnetic field until the proton's cyclotron frequency is 9.70 MHz . At this field strength, the Hall voltage on the probe is 0.549 mV when the current through the probe is 0.146 mA . Later, when an unknown magnetic field is measured, the Hall voltage at the same current is 1.735 mV .A) What is the strength of this magnetic field?
A twirlers baton is 0.76 m long and spins around its center. The end of the baton has a centripetal acceleration of 47.8 m/s2?A 0.31 sB 0.56 sC 4.3sD 70s
Diethyl ether has a H°vap of 29.1 kJ/mol and a vapor pressure of 0.703 atm at 25.0°C. What is its vapor pressure at 60.0°C?
producers
decomposers
heterotrophs
Answers
Answer:
Explanation:
Decomposers is the correct answer
Answer:
Decomposers is the right answer
Explanation:
Maggots are decomposers because they eat the dead bodys for energy
I don't know if the thing I wrote it truse so ya
Part 3) What if the felon then sped up to 30 m/s and all other conditions remained the same?
Answers
1) 621.8 Hz
2) 719.3 Hz
3) 700 Hz
Explanation:
1)
The Doppler effect occurs when there is a source of a wave in relative motion with respect to an observer.
When this happens, the frequency of the wave appears shifted to the observer, according to the equation:
where
f is the real frequency of the sound
f' is the apparent frequency of the sound
v is the speed of the sound wave
is the velocity of the observer, which is negative if the observer is moving away from the source, positive if the observer is moving towards the source
is the velocity of the source, which is negative if the source is moving towards the observer, positive if the source is moving away
In this problem we have:
f = 700 Hz is the frequency of the siren
v = 343 m/s is the speed of sound
is the velocity of the car with the siren
is the velocity of the felon (he's moving away from the siren)
So, the frequency heard by the felon is
2)
In this case, the cop does a U-turn and speeds towards the felon at 30 m/s.
This means that now the siren is moving towards the observer (so, becomes positive), while the sign of
still remains positive.
So we have:
f = 700 Hz is the frequency of the siren
v = 343 m/s is the speed of sound
is the velocity of the car with the siren
is the velocity of the felon
So, the frequency heard by the felon is
3)
In this case, the felon speeds up to 30 m/s.
This means that now the felon and the siren are moving with the same relative velocity: so, it's like they are not moving relative to each other, so the frequency will not change.
In fact we have:
f = 700 Hz is the frequency of the siren
v = 343 m/s is the speed of sound
is the velocity of the car with the siren
is the velocity of the felon
So, the frequency heard by the felon is
So, the frequency will not change.
Answers
The magnitude of impulse will be "9.6 Ns".
According to the question,
Mass,
- m = 2.4 kg
Final velocity,
- v = 2.5 m/s
Initial velocity,
- u = -1.5 m/s
By using Newton's 2nd law of motion, we get
→ Impulse,
By substituting the values, we get
Thus the above answer is right.
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Answer:
9.6 Ns
Explanation:
Note: From newton's second law of motion,
Impulse = change in momentum
I = m(v-u).................. Equation 1
Where I = impulse, m = mass of the ball, v = final velocity, u = initial velocity.
Given: m = 2.4 kg, v = 2.5 m/s, u = -1.5 m/s (rebounds)
Substitute into equation 1
I = 2.4[2.5-(-1.5)]
I = 2.4(2.5+1.5)
I = 2.4(4)
I = 9.6 Ns
Answers
Image is missing, so i have attached it
Answer:
19.04 × 10⁻⁴ T in the +x direction
Explanation:
We are told that the point P which is equidistant from the wires. (R = 5.00 cm). Thus distance from each wire to O is R.
Hence, the magnetic field at P from each wire would be; B = μ₀I/(2πR)
We are given;
I = 2.4 A
R = 5 cm = 0.05 m
μ₀ is a constant = 4π × 10⁻⁷ H/m
B = (4π × 10⁻⁷ × 2.4)/(2π × 0.05)
B = 9.6 × 10⁻⁴ T
To get the direction of the field from each wire, we will use Flemings right hand rule.
From the diagram attached:
We can say the field at P from the top wire will point up/right
Also, the field at P from the bottom wire will point down/right
Thus, by symmetry, the y components will cancel out leaving the two equal x components to act to the right.
If the mid-point between the wires is M, the the angle this mid point line to P makes with either A or B should be same since P is equidistant from both wires.
Let the angle be θ
Thus;
sin(θ) = (1.3/2)/5
θ = sin⁻¹(0.13) = 7.47⁰
The x component of each field would be:
9.6 × 10⁻⁴cos(7.47) = 9.52 × 10⁻⁴ T
Thus, total field = 2 × 9.52 × 10⁻⁴ = 19.04 × 10⁻⁴ T in the +x direction
Final answer:
The magnetic field at point P, which is equidistant from two long parallel wires with equal anti-parallel currents, is calculated using Ampere's law. The net magnetic field is zero because the fields due to each wire cancel each other at that point.
Explanation:
The question concerns the calculation of the magnetic field at a point equidistant from two long parallel wires that carry equal anti-parallel currents. According to the right-hand rule and Ampere's law, each wire generates a magnetic field that circles the wire. For two wires carrying currents in opposite directions, the magnetic fields at the midpoint between the wires will point in opposite directions, thus they will subtract from each other when calculating the total magnetic field at point P.
To find the magnetic field at point P, we use the formula for the magnetic field due to a long straight current-carrying wire: B = (μ₀I)/(2πd), where B is the magnetic field, μ₀ is the permeability of free space (4π x 10-7 T·m/A), I is the current, and d is the distance to the point of interest from the wire. In this case, the distance d will be the radius R = 5.00 cm since point P is equidistant from both wires.
Substituting the values into the formula, the magnetic field due to each wire at point P can be calculated. However, since the currents are anti-parallel, the net magnetic field at P would be the difference between the two fields, which is zero.
come to a conclusion that leads to reasonable action consistent with moral values.
B.
clarify your own stage of moral reasoning.
C.
identify more prescriptive than descriptive premises.
D.
make certain you are being guided by good intentions and a clear conscience.
Answers
In constructing a moral argument, the point is to
A.
come to a conclusion that leads to reasonable action consistent with moral values.
Hope this helps!
Answers
Answer
given,
Tension of string is F
velocity is increased and the radius is not changed.
the string makes two complete revolutions every second
consider the centrifugal force acting on the stone
=
now centrifugal force is balanced by tension
T =
From the above expression we can clearly see that tension is directly proportional to velocity and inversely proportional to radius.
When radius is not changing velocity is increasing means tension will also increase in the string.