when 0.5kg aluminium is heated using 1.5kw heater the mass of the aluminium changes completely into liquid in 126 seconds. during this time the temperature remains constant at 660 degrees Celsius. what is the specific latent heat of fusion of aluminium​

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?