3. NASA is designing a rover to investigate a newly discovered planet, named Terminus, outside of the solar system. The force of gravity of the rover on the Earth is 90 N. The
rover is then sent to Terminus, which has 0.4 time the mass of the Earth and 3/4 times
the radius of the Earth.
What is the force of gravity on the rover at the surface of Terminus? Round your
answer to the nearest whole number.

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.

Match each scenario to the form of energy it represents

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%