The angle between the rod and the string at B is 50°. The rod has length 1.2m and weight 8.5 N. An object O of mass M is hung from the rod at B. The tension T in the
string is 30N
(i) Use the resolution of forces to calculate the vertical component of T.

If you put a helium-filled balloon in the refrigerator, what will happen?

Aswimming pool whose volume is 10 comma 000 gal contains water that is 0.01% chlorine. starting at tequals0, city water containing 0.003% chlorine is pumped into the pool at a rate of 5 gal/min. the pool water flows out at the same rate. what is the percentage of chlorine in the pool after 1 hour? when will the pool water be 0.006% chlorine?

Which statements best describe medical uses for radioactive isotopes? check all that apply. radioactive isotopes are used to detect medical problems. high-energy gamma rays are injected into the body. radioactive isotopes are used to treat some diseases. radiation is used to kill cancer cells. radioactive isotopes are directed at tumors from outside the body.