Answer:
You can cause a physical change by bending, ripping, melting (and refreezing), folding, breaking, and there are some others. The main deal with physical changes is that the substance isn't formed into something new, that would be a chemical change.
Answer 2
Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance tochange into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
A student walks for 2.0 hours and travels 5.0km. What is the average speed of the student?
Answers
2.5KM/H BECAUSE 5 DIVIDED BY 2 IS 2.5
Hydrangea plant's petals change to which colour on the addition of acids?
Answers
If it's a pH below six it's blue, if it's a pH between 6 and 7 then it would be purple, if it's above 7 it would be pink or red
What hapeens to water once it reches the earth's surface
Answers
It either sinks into the ground or will eventually ending up in aquifers. It would also probably run of into creeks and rivers. Once its in the ground, its called "ground water". Hope this helps!:)
It either soaks into the ground, or it's eventually going to end up in the acquifers. Also it runs off into the creeks and rivers eventually reaching the ocean. Once it goes into the ground the water becomes ground water.
What is the ratio of straight haired offspring to curly hair offspring?
Answers
Answer:
. If both parents have wavy hair, what is
the phenotype (and genotype) ratio for
their offspring?
A.3:1 (curly to straight)
B.All wavy haired offspring
C. 1:2:1 (curly: wavy: straight)
D.9:3:3:1
Explanation:
When a 1 kg ball is dropped from the roof of a building its speed increases from 0 m/s to 10 m/s just before it hits the ground. What is the ball's change in Kinetic Energy at its maximum (fastest) speed?
Answers
30 kinetic energy is the answer.
30m/s It is at its maximum speed
A container holds 800 mL of a gas at 25.0 C and 745 tore. What will be the volume of the gas of the pressure is increased to 790 torr and the temperature remains constant at 25.0C