The Great Lakes of the United States are often covered with a sheet of ice every winter. Which best explains why this ice does not sink to the bottom?

Which of the following devices is used in this experiment to separate the different wavelengths emitted by the light source? A. Prism B. A transmission grating C. A reflection grating D. All of the above

Which of these is NOT an example of work? A. Holding a heavy book B. Pushing a wheelbarrow C. Lifting weights

if 10 calories of energy are added to 2 grams of ice at - 30°C, calculate the final temperature of the ice.

A 60-kg skier starts at the top of a 10-meter high slope. At the bottom, she is traveling 10 m/s. What is her potential energy? A. 5,880 J B. 6,000 J C. 2,880 J D. 3,000 J

Which of these best describes how an appropriate star chart is selected to locate objects in the sky? match the temperature and humidity of the air match the day and time of the year and location match the latitude and number of stars in the sky

How is thermal energy transferred during convection?

What is the purpose of a free body diagram? A. to show the velocity of an object B. to show the acceleration of an object C. to show the forces acting on an object D. to show the direction of motion vectors of an object

An initially uncharged air-filled capacitor is connected to a 5.83 V charging source. As a result, 3.41*10-5 C of charge is transferred from one of the capacitor's plates to the other.

Which objects are inclined planes? Check all that apply. a nail a staircase a seesaw a wheelchair ramp a slide

In a reaction with water, a base will accept a proton from the water; therefore, the water must be acting as an acid. True or False