Aweather balloon holds 2,850 cubic meters of helium. the density of helium is 0.1685 kilograms per cubic meter. how many kilograms of helium does the balloon contain? round your answer to the nearest whole number. only enter a numerical value in the answer blank.

Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

If a sphere and a cure have the same mass and are propelled up a ramp with the same force, which would travel father up the ramp? explain.