Áp suất trên đồng hồ nạp gas của máy lạnh chỉ giá trị 65 PSI, nếu quy đổi sang đơn vị kG/cm2 thì có giá trị:

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

What is the speed of an object at a given moment?