12. A boy of mass 50 kg running 5m/s jumps on to a 20kg trolley

travelling in the same direction at 1.5m/s. Find their common

velocity. Assume that there is no external unbalanced force

working in the horizontal direction.

Which mineral test was used if a geologist refers to a mineral as metallic?

Which type of reaction is NaCl + AgNO3 → NaNO3 + AgCl? A. Synthesis B. decomposition C. oxidation D. replacement

You will get brainliest Which correctly identifies the verb and its mood in this sentence? It has been raining for seven hours.

What statement best describes what it means to maximize your efforts in sports? A. giving your best effort only when losing B. ignoring mistakes and continuing to play C. keeping a good sense sense of humor D. none of the above

what would happen wait well lets say a nuke was strong enough to with stan lava in the center of the earth, ok, and it exploded what would happen to the earth.

A wire of length 25.0 cm carrying a current of 4.21 mA is to be formed into a circular coil and placed in a uniform magnetic field B with arrow of magnitude 5.55 mT. Suppose the torque on the coil from the field is maximized.

Compare the weight of a mountain climber when she is at the bottom of a mountain with her weight when she is at the top of the mountain. In which case is her weight larger? a. Both are the same. b. She weighs four times as much at the top. c.

You recently won a bicycle race that was 100 km in distance. The race took you two hours to complete. What was your average speed?

A hydrogen atom has one proton, two neutrons, and no electrons. Is this atom neutrally charged? Explain your answer.

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is pulled A. gravity pulls very hard on the milk carton. B. the milk carton has very little weight. C. the milk carton has inertia. D.