Which of the following would not make a good insulator

* rubber

*plastic

*wood

*metal

If 40 kJ of heat energy are added to 4 kg of water at 30°C, what will be the final temperature of the water? The specific heat of water is 4186 J / (kg·°C)

A car goes forward along a level road at constant velocity. The additional force needed to bring equilibrium is ...

Does the ke of a car change more when it accelerates from 11 km/h to 21 km/h or when it accelerates from 21 km/h to 31 km/h?

A string is wrapped around a pulley with a radius of 2.0 cm and no appreciable friction in its axle. The pulley is initially not turning.

Calculate the weight in newtons of a 2.4-kg melon. express your answer to two significant figures and include the appropriate units.

Does increased velocity on an object result in a positive acceleration

Equal masses are suspended from two separate wires made of the same material. The wires have identical lengths. The first wire has a larger cross-sectional area than the second wire. Which wire will stretch the LEAST? a.

Name at least three physical properties of the bowling ball.

What is one way to find the number of valence electrons in an element

A 4.5 kg dog stands on an 18 kg flatboat at distance D=6.1 m from the shore. it walks 2.4 m along the boat toward shore and then stops. assuming no friction between the boat and the water, find how far the dog is then from the shore.