Question

1) We use this formula: [Experimental value – Theoretical value]/ [Theoretical value] to calculate:

Group of answer choices

Atomic decay

Biased Error

Relative percent error

Efficiency

Redshift

2)You measure the diameter of a cylinder 5 times and get five different values (d1, d2, d3, d4, d5.) Then, the average value would be:

Group of answer choices

(d1 x d2 x d3 x d4 x d5) divided by 5

(d1 + d2 + d3 + d4 + d5) divided by 5

√(d1 + d2 + d3 + d4 + d5.

None of these is correct

3)Resistance is:

Group of answer choices

Resistance is the opposition to current flow (movement of electrical charge).

None of these statements is correct

the ability of conductors to transmit ions

the backward motion of electrons in atoms

4)The unit of Density is:

g/cm²
or kg/m²       

g/cm³
or kg/m³

g/cm or kg/m

g/s or kg/h

5)Mark the correct statement:

Group of answer choices

Ohm’s Law defines the relationship between Current, Power, and the Distance between Charges

Ohm’s Law defines the relationship between Current, Voltage, and Resistance

Ohm’s Law defines the relationship between Electric Force, and the Distance between Charges

Ohm’s Law defines the relationship between Induction, Voltage, and Power

6)What is the “Systematic Error”?

A systematic error is one which is intrinsic in the experimental setup and always effects the measurement in the same way.

Random Errors or typos which occur in data entering

Errors in solving our mathematical formulas

7)A laser beam hits the surface of a mirror at an angle of 55 to the normal. The reflected beam’s angle respect to the normal is:

45

35

55

25

8)Mark the correct statement:

A light beam passing through a small opening or an obstacle will produce a diffraction pattern consisting of light and dark areas on a screen.

All of these statements are correct.

None of these statements is correct

Diffraction pattern appears due to the constructive and destructive interference of light waves.

Measuring the diffraction pattern and having the frequency of light enables us to measure very small objects.

9)As light travels from a rarer to a denser medium it will have

Group of answer choices

decreased velocity

decreased wavelength

No change in light velocity

increased velocity

10)To float an egg on the water:

Group of answer choices

decrease the density of water

add oil to the water

warm the water

increase the density of water

11)It takes 1 second for a stone to fall to the bottom of a mine shaft. How deep is the shaft (d = ½ gt^2)?

about 2.5 m

about 10 m

about 1 m

about 5 m

12)You have a defective ruler which has an error of 2 mm in every 10 cm. If you do measurements with this ruler, your data will have:

Group of answer choices

No error

Random error

Systematic error

13)Mark the correct statement:

Group of answer choices

Hooke’s law states that the force needed to extend or compress a spring by some distance is proportional to that distance.

Hooke’s law states that the force needed to extend or compress a spring by some distance is proportional to its momentum.

Hooke’s law states that the force needed to extend or compress a spring by some distance is proportional to its temperature.

14)Mark the correct statement:

Density is defined as the pressure per unit volume

Density is defined as the pressure per unit mass

Density is defined as the mass per unit volume

15)What is Conservation of momentum?

Momentum of the system before the collision is smaller than the Momentum of the system after the collision

Momentum of the system before the collision x Momentum of the system after the collision = 0

Momentum of the system before the collision = Momentum of the system after the collision

16)Mark the correct statement:

It is possible that each time we take a data point we make a random error

All of these statements are correct

The measured values are collectively called data

Random errors tend to cancel themselves out over a large number of measurements

Answer 1

solution - Relative error = (Experimental valve --- Theoretiga valus Theoreticay vaque Relative percent error = experimentas valve - Theoreticas value e] x 100 Theoretical Valve Average vague of five diffirent values dit dat dat de tds o 3 Resistance is the opposition to current flow (movement of electrical charge). is The unit of bensity 9 cm Bg ทา 3

Ohm's Law defines. the relationship between current 'I', voltage'v', and Resistance ce VE IR 6 A systematic error is one which is intrinsi in experimental setup and always effects the measurement in the same way 67 The reflected beam's angle respect to the normas 55 By shell's law (Angle of incident a Angle of reflected.)

None of these statement is correct. A Light beam passing through a smage opening or an obstacle will produce a diffraction Diffraction pattern a not appears due to the Constructive and destructive interferes chce of light waves As light travess from a rarer to a denser medium It will have decreased velocity. By sneaels law Sin VI h2 ng Sin Oz where - di 82 Angle of incident Angle of refraction velocity of first medium velocity of second medium refractive index of first refractive intex of and medium hi medium, 12

To float an egg on the water. increase the density of water. ( fa 1 second ga gravity of earth = 10 m/s2 deer shaft - de 2 g +2 2 1 x 10x (1) 2 2 2 sm - about 5 m 12 systematic error 13 Hook's law states that the force needed to extend or compress a spring distance is proportionae to that distance by some 14 mass per Density is defined as the unit volume

Conservation of momentum. Momentum of the system before the Collision z Momentum of the system after the collision 16 It is possibege that each time we take a data error. correet. point we make a random All of these statement are