Which of the following is a definite indicator of a chemical change?

A.

The shape of a substance is changed.

B.

A new substance is formed.

C.

A substance is converted from a liquid to a gas.

D.

The change in a substance is reversible.

Your new motorcycle weighs 2450 n what is its mass in kilograms?

Activity 2 - Metals and Their Ores Analysis 1. Which country is most frequently seen as the top consuming country according to the information on the "metals" cards? What reasons might there be for this 2.

A force of 25.0 n is required to start a 3.0 kg box moving across a horizontal concrete floor. (a) what is the coefficient of static friction between the box and the floor? (b) if the 25.0 n force continues, the box accelerates at 0.50 m/s2.

Consider this row in the periodic table of elements. Which element (s) are most likely to conduct electricity? A) lithium and beryllium B) fluorine and neon C) boron and carbon D) lithium

the wires inside a cable each have there own plastic insulation. why does the insulasion have diffrent colours

What is something that has a lot of thermal energy?

Why do we use a shunt on the galvanometer

Two of the element sodium combine with one of the element chlorine to form the sodium chloride.

What is the wavelength of an earthquake wave if it has a speed of 4 km/s and a frequency of 7 Hz?

Which of the following do not involve a direction? Check all that apply. A. Time B. Velocity C. Distance D. Acceleration