Physics

Question 1

What is the mass of an electron?

Answer 1

9.11 x 10^-31 kg

Question 2

What is the charge of a proton?

Answer 2

1.6 x 10^-19 C

Question 3

What is the time duration for the PHY 102 exam?

Answer 3

1.5 hours

Question 4

Which statement is true about insulators and conductors?

Answer 4

The resistance in a circuit is directly proportional to the potential difference.

Question 5

What is the formula for electric potential energy?

Answer 5

U = qV

Question 6

What is the force experienced by a charge in an electric field?

Answer 6

F = qE

Question 7

What is the electric field strength between two plates connected to a 120 V battery separated by 2.0 cm?

Answer 7

6.0 kV/m

Question 8

What is the force experienced by a charge in an electric field of 6.0 kV/m?

Answer 8

-9.6 x 10^-16 N

Question 9

What is the magnetic field strength required for electrons to move in electromagnetic waves with a frequency of 2450 MHz?

Answer 9

0.08777 T

Question 10

What is the rate of change of the magnetic field around a 120 cm wire?

Answer 10

0.020 T/s

Question 11

What is the total circuit resistance if the induced emf is 2.4 x 10^-3 V?

Answer 11

5 Ω

Question 12

What is the equation that correctly states how magnetic flux is calculated?

Answer 12

Φ = ∫ B.dA

Question 13

What factors affect the capacitance of a capacitor?

Answer 13

Area of the plates, separation between the plates, permittivity of free space.

Question 14

What is the potential difference required to give a helium nucleus (q = 3.2 x 10^-19 C) 7.68 x 10^-15 J of kinetic energy?

Answer 14

2400 V

Question 15

What is the electrostatic force when an electron and proton are separated by 8.2 x 10^-10 m?

Answer 15

F = k * |q1 * q2| / r^2

Question 16

What is the work done by an external agent in carrying a charge of 5 x 10^-5 C across a potential difference of 42 volts?

Answer 16

2.1 x 10^3 J

Question 17

At what distance from a long straight conductor carrying a 1.0 A current does the magnetic field have a magnitude of 0.5 x 10^-6 T?

Answer 17

39 x 10^-2 m

Question 18

What is lodestone?

Answer 18

An oxide that has magnetic properties.

Question 19

What is the total force exerted by two charges, 2 nC and -3 nC, located at different distances from the origin?

Answer 19

F = k * |q1 * q2| / r^2

Question 20

What phylum were hemichordates formerly members of?

Answer 20

Hemichordates were formerly members of the phylum chordata.

Question 21

Why were hemichordates separated from chordates?

Answer 21

They were separated because they lacked a notochord.

Question 22

What structure in hemichordates resembles a notochord?

Answer 22

Their buccal diverticulum, which extends to the proboscis, resembles a notochord.

Question 23

What is the habitat and lifestyle of hemichordates?

Answer 23

Hemichordates are marine and solitary.

Question 24

What are the three body divisions of hemichordates?

Answer 24

The body is divided into proboscis, collar, and trunk.

Question 25

What type of symmetry do hemichordates exhibit?

Answer 25

Hemichordates are bilaterally symmetrical.

Question 26

What is the primitive notochord in hemichordates called?

Answer 26

The primitive notochord is restricted to the proboscis and is called stomochord.

Question 27

What type of tissue layers do hemichordates have?

Answer 27

Hemichordates are triploblastic.

Question 28

What type of body cavity do hemichordates possess?

Answer 28

Hemichordates have a true coelom.

Question 29

What is the shape of the gut in hemichordates?

Answer 29

They have a straight or U-shaped gut with an anus.

Question 30

What is the nature of the nervous system in hemichordates?

Answer 30

The nervous system is normally diffuse and variable.

Question 31

What type of circulatory system do hemichordates have?

Answer 31

Hemichordates have an open circulatory system.

Question 32

What is unique about the blood of hemichordates?

Answer 32

The blood has no color and corpuscles.

Question 33

What is the excretory organ in hemichordates?

Answer 33

The excretory organ is the glomerulus.

Question 34

What type of feeding do hemichordates practice?

Answer 34

Hemichordates are filter feeders.

Question 35

How many classes are there in Hemichordata?

Answer 35

There are four classes: Enteropneusta, Pterobranchia, Plantosphaeroidea, and Graptolita.

Question 36

Can you name examples of hemichordates?

Answer 36

Examples include Cephalodiscus and Rhabdopeura.