1. Which of the following is NOT an example of a lever?

☐ a hammer pulling a nail

☐ a staircase

☐ a seesaw

☐ a crowbar

What is the power system?

A 1-m long, thin symmetric airfoil is placed at a free stream. Calculate the drag force for the wind speed of 150 m/s. Assume that the average friction coefficient is C subscript D equals 0.002.

When an electrical signal travels through a conductive wire, it produces an electromagnetic (EM) field. Likewise, when an EM field encounters a conductive wire, it produces a proportional electrical current. A. True B. False

Suppose a large amount of power is required. Which engine would you choose between Otto and Diesel? Why?

Consider a 1000-W iron whose base plate is made of 0.5-cm-thick aluminum alloy 2024-T6 (rho = 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.

What is the distance 1

Convert 30.12345 degrees into degrees, minutes and seconds.

Between a hypothesis and a prediction

A local reaction is when a chemical enters the bloodstream?

The rules for ordinary arithmetic involving addition, subtraction, and multiplication carry over into modular arithmetic. Tru