Joe used a 750 watt 1/2" cordless drill to put together a bookcase. Calculate the work involved in this thirty minute process.

A)

2.4 J

B)

60 J

C)

22,500 J

D)

1,350,000 J

A simple heat engine might make use of the warm air around New York city. Enegy could be takenn as heat from the atompsphere (assume 30 celcius) and rejected as heat to the Hudson River (10 celcius).

A car traveling at 35 m/s starts to decelerate steadily. It comes to a complete stop in 5 seconds. What is its acceleration.

What is 2.5 * 104 * 3 * 102? A. 5.0 * 108 B. 5.5 * 106 C. 7.5 * 106 D. 7.5 * 108

Violet light has a frequency of 7.26 * 1014 Hz and travels at a speed of 3.00 * 108 m/s. What is the wavelength of violet light, rounded to the nearest nanometer?

1. What is a reasonable distance between two cities? (1 poi 200 km 200 m 200 cm O 200 mm

Distracted driving laws have been put in place due to scientific studies that have shown the dangers associated with wireless technology. DDT. plastics. vaccines.

An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, the current through the resistor is (1) halved (3) quartered (2) doubled (4) quadrupled

If it takes 20n to move a box, how much power will be needed to move the box a diatance

What type of rock forms due to heating and cooling?

If a body of mass 10 kg is pushed with a force of 15N, then the acceleration of the body is