A force of attraction would exist between

A.

a positively charged object and a negatively charged object.

OB. two negatively charged objects

C. a negatively charged object and a neutral object.

OD. two positively charged objects.

A carnot engine operates between two heat reservoirs at temperatures th and tc. an inventor proposes to increase the efficiency by running one engine between th and an intermediate temperature t and a second engine between t and tc using as input

Which of the following is has the least amount of strength? 1 weak nuclear 2 electromagnetic 3 gravitational. 4 strong nuclear

How long do comets last?

A car accelerates at 2 m/s/s. Assuming the car starts from rest, how far will it travel in 10 seconds? Options are: 40 m 2 m 200 m 10 m 100 m

Which of these steps would most likely be part of a lab procedure? a. Write a hypothesis to answer a question. b. Write a title at the top of a completed lab report. c. Record the time to complete a chemical reaction. d.

Which statement describes a scientific theory? A theory states how something behaves without explaining why. A theory is a proven fact that cannot be changed. A theory changes based on new observations and testing.

What are the differences between deterministic forces and thermal agitation?

What causes the acceleration to increase or decrease?

When You lift a load, the resistance force is? A. magnetism b. gravity

What changes a ball velocity