Why do electrical devices have resistance

When a solid A of mass 12g is completed immensedin a measuring cylinder filled with water it diplaces the same volume of water as does solidB if mass 8 what can be deduced about the densities of solid AandB

You push a 50 kg wooden box across a wooden floor at a constant speed of 1.0 m/s. The coefficient of kinetic friction is 0.15. Now you double the force on the box. How long would it take for the velocity of the crate to double to 2.0 m/s?

When reporting the speed, we need to include the value, units and direction the object was traveling. True or False?

When a front wheel drops off the roadway you should?

23 grams of sodium reacted with 35.5 grams of chlorine. Calculate the mass of the sodium chloride compound formed

Which of the following processes transfers heat? A. radiation B. conduction C. convection D. all of these

What role do consumers play in a mixed economy?

When is the data considered valid

Which of the following are not part of the stages in cognitive development? A. Sensorimotor B. Concrete C. Formal D. Semi-formal E. Formal operational

If an ice cube melts at 0°C but water freezes at 0°C what is the difference between melting and freezing in terms of energy involved with phase changes and be particles of substances during the phase changes?