18. The slowest animal ever discovered was a crab found in the Red Sea. It traveled with an average speed of 5.70 km/year. How long would it take this crab to travel 5.0 miles? (1 mi. = 1.61 km)

Amass has an acceleration of 10- 2t. what is its velocity and displacement if it started at x- 4m and the initial velocity was 8m/s? at what time does it have 0 velocity? graph all graphs.

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.

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving