Which of the following is a sign that a chemical change has taken place when wood burns?

bubbles

rust

production of a liquid

production of heat

A child in about those 85.15 kg package out horizontally with a speed of 10 m/s the mass of the child is 27.2 kg in the mass of the ball is very 3.8 kg calculate the velocity of the ball immediately after assuming it was initially at rest

Part A What are the dimensions of density, which is mass per volume? The dimensions of mass and length are abbreviated as [M] and [L] respectively.

4. Next discuss how Dr. Knappe used technology to measure how fast the tectonic plates are moving apart. What devices did she use?

U are asked to measure the amount of liquid held in a sports drink bottle. which is an appropriate unit of measurement? is grams, mililiters, milligrams or centimeter

A race car completed a race in 150 minutes. Its average speed was found to be 150 km/hr. What is the total distance that the car has covered?

two wires each have a current running through them and are placed next to each other. will one wire be affected by a force from the other? and why?

When using a lever, what is the input force called

Who is most likely to benefit from use of lithium?

How do you determine if a charged comb is positively charged or negatively charged. Suppose it is positively charged, it will attract negative charge on the electroscope and the positive charges on the leaves will repel.

What is the biggest problem with invasive species in their new location? A They are always stronger than native species. B They evolve more quickly than native species. C They have higher reproductive rates than native species.