Penguins are extremely well adapted to swimming in water at fast speeds. penguins can swim as fast as 40 km/h underwater. scientists have many times found that by looking at nature, they can develop better technology. what type of technology could the study of penguins improve?
a cruise boat technology
b submarine technology
c buoy technology
d scuba diving technology

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

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.