Two boys push horizontally a 30kg bicycle and it accelerates at 1.5 m/s2. if the sum of opposing force is 40n. what force must they be exerting on it.

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

What are the north and south poles of a solenoid change with?