How much heat does it take to raise the temperature of 5.0 kg of plastic from

15°C to 75°C? The specific heat of plastic is 2.60 kJ / (kg•°C),

Use Q = mc Tp-T).

A. 300 kJ

B. 780 kJ

C. 196 kJ

D. 980 kJ

Define electronegativity: a. an atoms ability to attract electrons that are shared in a chemical bond b. an atoms ability to form a cation an atoms ability to form double and triple bonds c. an atoms ability to form an ionic bond with another atom d.

1) Halving the distance (i. s., decreasing by a factor of two) between two charged objects will cause the electrical force between them to be ___ the initial force

Several teenagers swim toward a rectangular, wooden raft that is 2.00 m wide and 2.50 m long. If the raft is 9.80 cm thick, how many 75.

Scientists on Earth are able to communicate with rovers on Mars through their receivers, which can receive and process signals. Which of these best describes the signals sent and received by rovers? A. gravitational energy B. electromagnetic waves C.

A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

Acceleration is a vector quantity. O O A. True B. False

What will happen to the brightness of a string of bulbs hooked up in series when you increase the number of bulbs in the string? A. Each light in the string will get brighter. B. Each light in the string will get dimmer. C.

What are the two factors that influence the composition of beach material

Which of the following indicates that a ChemicL change has taken place? (A) a change from liquid to a gas (B) an increase in the volume of a substance (C) a change in the color of a substance (D) a change from a solid to a liquid A precipitate is a

Which of these circuit schematics has an ammeter?