Ascientist discovered an elementary particle paired with another particle. it has a positive charge equal to two–thirds of the charge of an electron. how should the scientist categorize the particle?

a.) boson

b.) lepton

c.) photon

d.) quark

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car

The mantle is made up of which structural zones?

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.