A pencil sharpener contains which simple machine

Block and tackle

Lever

Wheel and axle

Pulley

What do you understand by the term equilibrium

At the beginning of the experiment, the aspirin pill contains 325 mg of acetylsalicylic acid and weighs 400 mg. at the end of experiment, you obtain 110 mg of pure acetylsalicylic acid. what is the % recovery?

What is the very small, dense center of an atom?

Biomes are defined by specific characteristics. What characteristics would define the biome shown? a. cool and windy with coarse gravelly soil b. low-growing shrubs and large furry carnivores c. cool and windy with small nocturnal carnivores d.

What do the repetitive patterns in a mineral form

How to solve determine the final temperature when 450.2 grams of aluminum at 95.2°c is placed in an insulated calorimeter with 60.0 grams of water at 10.0°c?

Which of the following is true about a scientific hypothesis? A. The hypothesis must form a scientific theory. B. The hypothesis must be testable. C. The hypothesis must predict the outcome of the experiment. D.

Convert 1.76 um to inches

Why is lewis electron-dot diagrams more suitable than electron-shell diagrams illustrating chemical bonds

What mass of sodium benzoate should be added to 150.0 ml of a 0.15 m benzoic acid solution in order to obtain a buffer with a ph of 4.25? (assume no volume change.) ?