A wire of length 5cm is heated from a temperature of 20c to 70°C if it undergoes a change
in lengte 2cm. Calculate
the linear expans of the wire

What happens to light waves from a star as the star moves away from earth?

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic