Observe the different flow velocities using the coring machine and the flags. Where is the glacier flowing the fastest and the slowest? Suggest a reason for this difference.
Solved
Show answers
More tips
- H Health and Medicine Is it true that working with a computer is harmful to your eyesight?...
- S Sport When is the Champions League final?...
- H Health and Medicine Is Folic Acid a Necessary Vitamin?...
- W Work and Career How to Start Your Own Business: Tips and Recommendations...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
Answers on questions: Physics
- P Physics What is kinematics ??explain !!! koii zinda hai -,- xD ?...
- P Physics Why is energy an essential part of human life??...
- P Physics 1.03 Transformation of energy flvs science question...
- P Physics 2. A crowbar used for turning a stone is shown in the diagram. In which direction (A or B) is the pivot to be shifted to increase the mechanical advantage? Write with...
- P Physics I m bore d, whos down to talk and also what s centripetal force?...
- P Physics How fast or slow an object is moving and in what direction...
- P Physics Asource of potential difference of 110v is used to operate a heater with a resistance of 220. how much energy is consumed in a 24hr day?...
- P Physics William took a 7 hour bicycle trip. In all, he traveled 112 miles. What was his average rate of speed in miles per hour?...
- C Chemistry 1. Look at the DNA molecule shown at right. What does it look like?...
- C Computers and Technology Which are common applications of deep learning in Artificial Intelligence (AI)?...
Ответ:
Method of decreasing friction:By polishing: Friction between two surfaces can be reduced by polishing them. The interlocking and projections are minimized by this method.
Ball-bearing: As the rolling friction less than the sliding friction consequently in rotating machinery, the shafts are fixed on the ball bearing so that the friction can be reduced considerably. For example-the free wheel of a cycle, the axle of a motorcar, the shafts of the motor dynmo etc. are provided with ball-bearing.
Lubricants: Friction between two surfaces can be decreased by using lubricants. A lubricant is a substance (a solid or a liquid) which forms a thin layer between the two surfaces in contact. It also fills the depressions present in the surfaces of contact and reduces friction considerably. In light machinery thin oils with low viscosity are used, in heavy and fast moving machinery thick oils and solutes (grease) are used.Streamline: The friction due to air is reduced by making the automobiles streamline.
Methods of increasing friction:By making the surface rough friction can be increased. Examples of increasing friction-the tires of a motor car and bicycles are made rough to increase the friction .when a ground or surface become slippery after rain or water splashing it is made rough by spreading sand to increase the friction.