What is the minimum number of data points an experiment should gather? A. one B. two C. three D. four
Answers
Related Questions
Suppose that you are riding a bike away from your dog who sits and watches you leave. If you use the bicycle as a reference frame, how does your dog appear to move?
For which object is the force of gravity greatest: Earth, Moon, or Sun? Why?
A 1000-kg car is moving along a straight road down a 30∘ slope at a constant speed of 20.0m/s. What is the net force acting on the car?
The mass of ball A is 10 kilograms and the mass of ball B is 5 kilograms. If the initial velocity is set to 3 meters per second for each ball, what is the final velocity of ball B if the final velocity of ball A is 2 meters per second? Use the elastic collision equation to find the final velocity of ball B. Assume ball A initially moves from right to left and ball B moves in the opposite direction. Identify each mass, velocity, and unknown. Show your work, including units, and indicate the direction of ball B in your answer.
Answers
R = ρ * (L/A)
Where R is the resistance, ρ is the resistivity of the material, L is the length of the resistor, and A is the cross-sectional area of the resistor.
Since both resistors are made from the same material and are at the same temperature, the resistivity ρ is the same for both resistors.
Let's calculate the resistance for R1 and R2 separately.
For resistor R1 (length = L and diameter = d), the cross-sectional area A1 is given by:
A1 = π * (d/2)^2
For resistor R2 (length = 8L and diameter = d/1), the cross-sectional area A2 is given by:
A2 = π * ((d/1)/2)^2
Simplifying the equations:
A1 = π * (d/2)^2 = π * (d^2/4)
A2 = π * ((d/1)/2)^2 = π * (d^2/4)
As we can see, both resistors have the same cross-sectional area A.
Now, let's calculate the resistance for R1 and R2:
R1 = ρ * (L/A1) = ρ * (L / (π * (d^2/4)))
R2 = ρ * (8L/A2) = ρ * (8L / (π * (d^2/4)))
Simplifying the equations further:
R1 = (4ρL) / (πd^2)
R2 = (32ρL) / (πd^2)
Now, let's find the factor by which the resistance R2 is greater than R1:
Factor = R2 / R1 = ((32ρL) / (πd^2)) / ((4ρL) / (πd^2))
Canceling out common terms:
Factor = (32ρL * πd^2) / (4ρL * πd^2)
Factor = 32 / 4
Factor = 8
Therefore, the resistance R2 is 8 times greater than the resistance R1.
The resistance of second resistor R2, is 16 times greater than the resistance of the first resistor R1.
The resistance of a cylindrical resistor is given by R = ρL/A, where ρ is the resistivity, L is the length, and A is the cross-sectional area (which is πd²/4 for a cylinder). For R1, it has length L and diameter d. For R2, it has length 8L and diameter d/1. The resistance of R2 is therefore:
R2 = ρ(8L)/(π(d/1)²/4)
By comparing R2 to R1, we find that R2 is 16 times the resistance of R1.
The resistance of second resistor R2, is 16 times greater than the resistance of the first resistor R1.
To know more about resistor, visit:
#SPJ11
B. False colors are added to images to make some structures more noticeable.
C. Electron microscopes focus beams of light using magnetic fields.
D. Electron microscopes are tools used to study living organisms when they're alive
Answers
Answers
The displacement covered by the bee that flies 2 meters east, 3 meters east, and 5 meters north is 7.05 meters.
What is Displacement?
Displacement of an object can be defined as the actual change in the position of an object. It is a vector quantity because it has both the direction and the magnitude.
The bee travels 2 meter east and 3 meters east. Therefore, the total distance covered in the east direction is (2+3) meters = 5 meters.
The bee travels 5 meters in the north direction. This makes a square of 5 meters dimension and in this condition, the displacement covered by the bee will be the diagonal of the square. Therefore, the total displacement of the bee can be calculated as:
Diagonal of square = a
where, a = side of the square
Side of the square = 5 meters
Diagonal of the square = × 5
= 1.41
Therefore, diagonal = 1.41 × 5
Displacement of the bee = 7.05 meters
Learn more about Displacement here:
#SPJ2
Answers
Answers
A mechanical wave is a disturbance in matter that transfers energy through the matter.
Final answer:
Mechanical waves require a medium to travel through, such as a solid, liquid, or gas.
Explanation:
Mechanical waves require a medium through which they can travel. The medium can be a solid, liquid, or gas. Examples of mechanical waves include water waves, sound waves, and seismic waves.
Learn more about Mechanical waves here:
#SPJ6
Answers
For that answer, we should take a second to look at the formula for kinetic energy:
Kinetic Energy of an object = (mass) x (speed)² .
The important thing to notice is that the KE is proportional to the square of
the speed. So if you multiply the speed by some number, the KE changes
by the square of that number.
Multiplying the speed of the car by 5 gives it (5)² = 25 times as much KE.