Tools and Technology Answers

The Port of Houston is one of the busiest ports in the country. The U.S. Department of Energy gave this port $3.4 million to operate twenty heavy-duty hydrogen hybrid fuel cell powered trucks around the port.Which is the most likely reason the U.S. government made such an investment?

Rudri studies for her physical science test on the history of the atomic model. She creates a table to show how the atomic model has changed over time. Which represents the correct order of development for the atomic model?

Mia uses the formula πr2 to find the area of a circle. What is πr2 an example of?

Which observation tool allows Shauna’s doctor to monitor her blood circulation in real-time?

For which group of people might brain-powered cars allow the greatest increase in mobility?

Which best describes the current model of the atom?

When people look through a telescope, air currents in the Earth’s atmosphere can distort the images they see. In the 1950s, a scientist named H. W. Babcock thought of a way to reduce this distortion by using a special device within the telescope. However, this device was not used until the 1990s.Which best explains why Babcock’s idea took many years to become a reality?

The public is not yet able to purchase cars powered by hydrogen fuel cells because engineers have to determine how the cars perform based on which scenario?

Which model is most likely used to show something that happens too slowly to see?

The robotic rover Curiosity has instruments that detect radiation both inside the spacecraft and in the Mars environment. What is most likely the purpose of this radiation detection?