An atom gains an additional electron. What is the overall charge

of the ion that is formed?

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When four atomic orbitals are mixed to form hybrid orbitals, how many hybrid orbitals are formed?

A can of juice had a mass of 250g. What does it weigh on earth?

a cube of sides 10cm is partly filled with sand of density 3.8g/cm3. If the weight of the sand is 200g, find the height in mm up to which it is filled in the container?

A 34 kg boy is riding his bicycle on the road. He exerts an 85 N force parallel to the road. If the acceleration of the bicycle is 1.9 m/s2, then what is the mass of the bicycle? A. 11 kg B. 15 kg C. 34 kg D. 45 kg

Technician A says twisted/shielded wire carries low current, and repairs to the wire must not increase the resistance of the circuit.

What causes an air conditioned to turn on

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

The speedof a boat in still water is v. The boat is to make a round-trip ina river whose current travels at speed u.

Why are there so few working wave power stations?

Two abiotic factor that effect an ecosystem are;