Total mechanical energy = kinetic energy + potential energy Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. It’s the energy in an object due to its motion or position. KE = 0.5mv^2 PE (energy stored in an object) = mass*g*height [g = acceleration due[…]
Molar mass is measured in grams per mole. You may need to calculate molar mass of a compound. This info is found in the periodic table. Example: NaCl has a molar mass of 58.35 (22.9+35.45) Na:22.9 Cl:35.45
– Density = mass/volume – Increasing pressure always raises density. Increasing temperature usually lowers density. When water freezes, it is less dense than liquid water. – Force of a spring = kx k is a constant and x is the amount of stretch or compression. – PE(spring) = 0.5kx^2 – Fahrenheit and Celsius F =[…]
– D=RT distance = rate * time – Position is in meters – Velocity is change in position, in meters per second – Acceleration is change in velocity, in meters per seconds^2 – Relative probability: P(X|Y) = P(X and Y) / P(Y) = probability of X given Y
Did you know that the ACT has a science section that tests your ability to interpret scientific data and make observations about the natural world? Photosynthesis: – Light + water + carbon dioxide –> oxygen and glucose – Occurs in chloroplasts – green pigment is called chlorophyll (only in plants!) – Uses solar energy and[…]
Cellular Respiration: – Occurs in mitochondria – Plants and animals – Converts chemical energy (glucose) to ATP – Solar energy –> photosynthesis—chemical energy –> cellular respiration—ATP – Cell membrane – used for active and passive transport
It is important to know basic biology, chemistry, and physics for the ACT Science section! – Facilitated diffusion = molecules go from an area of higher concentration to lower concentration with the help of a carrier molecule – across a selectively permeable membrane – can be with larger molecules – Ribosomes = protein builders of[…]
Monocot = flowering plant whose seeds have one embryonic leaf (cotyledon) Dicot = plant with seed with two embryonic leaves (cotyledons)
What is mitosis? Mitosis is the process of cell division. One cell becomes two cells with full chromosomal identity. Stages of mitosis: 1. Prophase 2. Metaphase 3. Anaphase 4. Telephase Cytokinesis begins in anaphase or telephase. Cytokinesis is the division of the cytoplasm into 2 new cells.
– DNA undergoes transcription to become RNA. RNA undergoes translation to become protein. – Ribosomes contain RNA – Proteins are large molecules with smaller amino acids in them. – The nucleus of a cell contains chromosomes. The chromosomes have DNA wrapped in proteins.