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What is the SI unit used to measure energy?
AJoule
BNewton
CWatt
DPascal
According to Archimedes’ principle, the buoyant force on a submerged object equals what?
AThe density of the object
BThe volume of the object
CThe weight of the fluid displaced by the object
DThe weight of the object itself
Why does an object made of a material denser than water sink when placed in water?
ABecause it lacks air inside it
BBecause water always sinks lighter objects
CBecause it has too much surface area
DBecause its weight exceeds the buoyant force provided by the displaced water
Pascal’s principle, which explains how hydraulic systems like car brakes work, states that pressure applied to a confined fluid does what?
AConverts entirely into heat
BOnly affects the point where it is applied
CDecreases as it moves through the fluid
DIs transmitted equally throughout the fluid in all directions
Which type of microorganism causes tuberculosis, commonly known as TB?
AA fungus
BA virus
CA parasite
DA bacterium
Which organ is primarily responsible for pumping blood throughout the human body?
AHeart
BLungs
CLiver
DBrain
Antibiotics are effective at treating infections caused by which type of pathogen?
ABacteria
BBoth viruses and bacteria equally
CPrions only
DViruses
Who developed the first successful vaccine, protecting against smallpox?
AAlexander Fleming
BLouis Pasteur
CRobert Koch
DEdward Jenner
DNA, the molecule that carries genetic information, is primarily found in which part of a human cell?
ACell membrane
BNucleus
CMitochondria only
DCytoplasm