một vật có khối lượng là 30kg bắt đầu chuyển động nhanh dần đều và sau khi đi được 20cm thì có vận tcs 6km/h lực tác dụng vào là

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form