A boat sails along the shore. To an observer, the boat appears to move at a speed of 11 m/s, and a man on the boat walking forward appears to have a speed of 12.4 m/s. How long does it take the man to move 6 m relative to the boat?

The main characteristic of all vertebrates is the presence of a. cartilage b. a large brain c. a backbone d. an exoskeleton I got it. The answer was B

Who performed classic experiments that supported the semiconservative model of dna replication?

A state patrol officer saw a car start from rest at a highway on-ramp. She radioed ahead to another officer 28mi along the highway. When the car reached the location of the second officer 27min later, it was clocked going 60 mi/hr.

A horse pulls forward on a carriage with a given force. By Newton's Third Law, the carriage must be pulling on the horse backward with an equal and opposite force. Given this, what explains why the horse and carriage can move forward?

A ford truck enters a highway and travels at a uniform speed of 50 mph. half an hour later a jaguar enters the highway at the same junction and heads in the same direction at 55 mph.

The equation e = mc2 relates mass and a. energy b. force c. work d. gravity

What should a scientist do to use scientific methods for determining the relative age of Earth's rocks? A be biased in opinion B disregard views of others C use creative ideas D prove that methods are non-testable

If a sample of gas is heated at a constant pressure what will happen to the volume of the gas

1. What is the speed of sound in air that has a temperature of 90.0 °C?

What effect does a doubling of the mass have upon the acceleration of the object? Be quantitative.