John is conducting an experiment that involves melting ice cubes. Which of the following is most important for John to collect reliable data? A. The outcome needs to be controlled.

B. An unbiased observer must witness the experiment.

C. Technology needs to be used to determine the results.

D. Only one variable should be tested during the experiment.

Avalue that describes how heavy an object is and is related to the force of gravity is

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0