Which of the following is a mixture?

A. steel

B. water

C. oxygen

D. gold

1. Why is water displacement an effective way of measuring the volume of an irregular solid?

Propose a hypothesis for how the position of the ball will affect the amount of its gravitational pull energy

Suppose the gravitational force between two masses is 10N. If the magnitude (numerical size) of each of the two masses double what is the new value of the new force between them. A. 5 N B. 20 N C. 40 N D. 10 N

To calculate the density of an object, which of the following values do you need to know? A. Volume B. Buoyancy C. Weight D. Mass

1. Describe the formation of the four types of fronts and the weather associated with each 2. How does the burning fossil fuels influence global temperature.

A small rock remains at rest in outer space while an astronaut pushes horizontally on it with a force of 20 N. Which of the following must be true? A. There is another horizontal force acting on the rock. B.

If an igneous rock has very large crystals of minerals that you can see when looking at it, which type of igneous rock is it

You have a 60-foot roll of fencing and a large field. You want to make two paddocks by continuing the fencing down the middle of a rectangular enclosure. What are the dimensions of the largest such enclosure you can make?

Crystallization is a separation technique used to produce rock candy from a sugar solution. true or false

A car traveling in a straight line has a velocity of 3.79 m/s at some instant. After 5.4 s, its velocity is 11.9 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2