Student Questions

In Rutherford’s gold foil experiment, why did a tiny fraction of alpha particles rebound back by 180 degrees? A) Because the atom is completely solid throughout. B) Because electrons exert a massive repulsive force. C) Because the positive charge and mass are concentrated in a tiny central nucleus. D) Because alpha particles are highly attracted to gold atoms.

Which of the following conditions will drastically speed up the rate of evaporation of a liquid?A) Decrease in surface area, increase in humidity.B) Increase in surface area, increase in wind speed.C) Decrease in temperature, increase in wind speed.D) Increase in humidity, increase in temperature.

Which of the following phenomena always results in a cooling effect?A) CondensationB) EvaporationC) SublimationD) Fusion

Which of the following statements correctly defines a pair of isotopes?A) Atoms with the same mass number but different atomic numbers.B) Atoms with the same atomic number but different mass numbers.C) Atoms with the same number of neutrons but different protons.D) Atoms with identical physical properties but different chemical reactions.

Which subatomic particle was discovered by J.J. Thomson using the cathode ray tube experiment?A) ProtonB) NeutronC) ElectronD) Alpha particle

Which range of frequencies represents the average audible range for a healthy human ear? A) 0 Hz to 20 Hz B) 20 Hz to 20,000 Hz C) 20,000 Hz to 50,000 Hz D) 200 Hz to 2,000 Hz

Through which of the following media can sound waves travel at the highest speed? A) Vacuum B) Water C) Air D) Steel

To make an embedded background video play automatically and continuously without stopping, which combination of boolean attributes must be added to the <video> tag? A) autoplay loop B) start repeat C) play continuous D) auto replay

Which attribute is used within a <source> tag to specify the media type (MIME type) of the linked file? A) src B) type C) media D) format

Which of the following is NOT a natively supported video file format in standard HTML5?A) Math B) WebM C) Ogg D) WMV

Which HTML5 tag is used to embed a standalone audio file directly into a webpage? A) <sound> B) <audio> C) <embed> D) <music>

Complete the sentence: "The management decided to reward the employees ______ project generated the highest revenue." a) who's b) whose c) which d) whom

Which of the following is a collective noun? A) MountainB) FlockC) HonestyD) Fire

Identify the abstract noun in the following sentence:"Her bravery in the face of danger inspired everyone." A) BraveryB) FaceC) DangerD) Everyone

who takes care of the home?

who is your uncles child?

who is your uncles child?

who is your mother's daughter

who is your father's son ?

who is your father's brother?