What are significant figures

Explain why surface temperature increases when two bodies are rubbed against each other. What is the significance of temperature rise due to friction?

A small lake with volume of 160,000 m^3 receives agricultural drainage waters that contain 150 mg / L total dissolved solids (TDS).

A house has well-insulated walls. It contains a volume of 135 m3 of air at 275 K. (a) Consider heating it at constant pressure. Calculate the energy required to increase the temperature of this diatomic ideal gas by 1.8°C.

A torsion member has an elliptical cross section with major and minor dimensions of 50.0 mm and 30.0 mm, respectively. The yield stress of the material in the torsion member is Y=400 MPa.

Suppose values is a sorted array of integers. Give pseudocode that describes how a new value can be inserted so that the resulting array stays sorted.

You built an android that has a subcircuit containing a power supply, a tactile sensor, and a fuse where safe operation should keep current below 250 mA. You measured that your sensor is dissipating 12 W, the power supply is pro - viding 12.

The electronics aboard a certain sailboat consume 50 W whenoperated from 12.6-V source. If a certain fully charged deep-cyclelead acid storage battery is rated for 12.

The water behind Hoover Dam in Nevada is 221 m higher than the Colorado River below it. At what rate must water pass through the hydraulic turbines of this dam to produce 50 MW of power if the turbines are 100 percent efficient?

Why is it important to cut all the way through an electrical wire on the first try?

The practice of honoring those who have been lost in battle dates back to which two ancient civilizations?