Awooden chair is pushed across the wooden floor. the friction is 34.5n what is the weight of the chair? what is the mass of the chair? (u = 0.30)

What are similarities and differences between refraction, reflection, diffraction and absorption?

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?