Explain how you know that gasoline burning in a car engine is a chemical change.?

4. How will you find the volume of an irregularly shaped object that would dissolve in water?

An Iron weight, suspended by a string, is motionless. The tension in the string is 4,75 newtons What is the mass of the iron weight? A 0.485 kilograms 4.75 kilograms C 9.65 kilograms OD 10.0 kilograms 15,5 kilograms

A mover has to move a heavy sofa of mass 112 kg to the second floor of the house. He uses a rope to pull the sofa up a ramp from the first to the second floor.

The magnetic field in a solenoid is. A circular wire of radius 8 cm is concentric with a solenoid of radius 2 cm and length d = 2 meter, containing 12000 turns. The current increases at a rate of 40 A/s. What is the emf in the wire?

What is the difference between negative displacement and negative velocity?

For glass fragments to be individualized, what must be true? A. They must fit together B. They must have the same density C. They must look the same D. They must be the same color

In what way would a digital thermometer be preferable to those from a liquid-based thermometer? Digital thermometer readings are easier to use when performing calculations.

Why does the core of the sun contain more helium and less hydrogen than the surface of the sun?

What happens to a light ray passing through the center of a lens?

A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.870 m/s at an angle of 35.0° above the table, and it lands on the magazine 0.0770s after leaving the table. Ignore air resistance.