A scientist in Northern California is studying the tree rings of a very old redwood tree. He notices that the oldest tree rings are very narrow. As the rings move away from the center, he observes 15 rings that get wider and wider. What can you determine about the climate during the 15-year period during which the tree rings grew wider?

The climate was warmer and wetter.
The climate was warmer and drier.
The climate was colder and drier.
The climate was colder and wette

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.