When a person bends an arm a different muscle is used to bring it back to the original position. why can't the same muscle be used to both bend and unbend the arm?

Rozważ, dlaczego telewizyjne satelity stacjonarne krążą nad równikiem. Zastanów się, czy można byłoby umieścić satelitę geostacjonarnego tak, aby jego orbita znajdowała się cały czas nad równoleżnikiem, np. przebiegającym przez Warszawę.

How much energy is contained in the mass of a 60-kilogram person?

Find the weight of a 15kg rock acceleration due to gravity is 9.8 m/s2 A. 5.2 N B. 15 N C. 147 N D. 1.53 N

Hydrostatic pressure is deadly to sea creatures true or false

What is the definition of voltage and how is voltage different from current?

If a space ship is traveling with a constant acceleration of 75 m/s^2 and travels for three weeks, how far did it travel and what was it's velocity before it stopped?

How could you change your track to maximize the kinetic energy of the skater? Explain?

3. However, until 2002, these three countries used different A. currents B. undercurrent C. currencies D. currency E. crosscurrent F. current G. currently

In the hydrologic cycle, water evaporates into the atmosphere. It then condenses and falls to the ground as precipitation. How can the water return to the atmosphere?

List 6 Physical properties List 6 Chemical properties