1.A beaker of mass 1.5 kg containing 2.4 kg of water rests on a scale. A 2.4 kg block of a
metallic alloy of density 4800 kg/m3
is suspended from a spring scale and is submerged
in the water of density 1000 kg/m3. What does the hanging scale read? The
acceleration of gravity is 9.8 m/s^2.
Answer in units of N.

2.What does the lower scale read?
Answer in units of N.

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your

Avoltaic cell converts chemical energy to