There are many different types of scientific investigations. Which of the following forms requires the identification and control of variables?

The length of a copper wire is 1.6 centimeters (cm). What is the length of this wire in meters (m) ?

The chart shows the densities of four substances. A 2-column table with 4 rows. The first column labeled Liquid has entries W, X, Y, Z. The second column labeled has entries 0.94, 0.84, 0.79, 0.93.

How do you comprehend the fourth dimension?

Which of the following is considered evidence for the theory of plate tectonics? A. The ring of fire B. Subduction zones C. Seafloor spreading D. All of the these

A 300 kg dragster accelerates from the rest to the final speed of 120 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is the average output in watts AND horsepower if this takes 7.30 seconds?

The voltage across the primary winding is 350,000 V, and the voltage across the secondary winding is 17,500 V. If the secondary winding has 600 coils, how many coils are in the primary winding? 30 583 12000 332500

A 200 watt t. v. is used for 20 hours in a week. If it is used for four weeks then what is cost of electricity if rate is 5rs/kwh

In an experiment, the control is never changed by the scientist not important to the scientist not recorded by the scientist changed by the scientist

When you catch a baseball, what kind of work do you do, negative or positive? by catching the ball, what do you change? what energy does it gain or lose?

All describe work except A) a team of dogs dragging a sled B) a jokey sitting on a horse C) a bowler lifting a bowling ball