PHYSICS Scholars

How do you know whether to use dot product or cross product in a vector problem? a. 1. The most basic difference is whether you are looking for a scalar result or a Vector result. Dot product gives you a scalar result whereas Cross product gives you a Vector result. 2. Basically the purpose of application differs. Dot product gives you an expression for Work done whereas Cross product gives you an expression for Torque. 3. Dot product would have been maximum if both the vectors had acted in the same direction, but a Cross product = 0 if both the vectors are in the same direction. More detailed explanation is given below- A. Dot product is simply the effect of one vector on the other should it be acting in the same direction as the base vector. Assume two vectors acting on a mass in the exact opposite directions. They would nullify each other. But if they were acting on the body in the same direction, the effect of the forces would be maximum. Assume vector a = 2i and vector b = 4i (bot...

DRY ICE (CO₂) 🔹What happens to the dry ice at room pressure and temperature? Dry ice is the name for carbon dioxide in its solid state. At room temperature, it will go from a solid to a gas directly. While carbon dioxide gas is invisible, the very cold gas causes water vapor in the air to condense into water droplets, thus creating fog. 🔹Table of Contents: 1 What happens to dry ice under pressure? 2 What happens when we leave dry ice at normal temperature and pressure class 9? 3 Why dry ice is stored at high pressure? 4 Why CO₂ does not melt at room temperature and pressure? 5 What would happen to dry ice if it is left out at room temperature long enough? 6 Does dry ice create pressure? 7 Can you pressurize dry ice? 8 What phase changes is dry ice? 9 What happens when the pressure under which dry ice is stored is decreased to one atmosphere? 10 What happens when dry ice is left open in open atmosphere name the process? 11 What happens if you put hot water on dry ice? 1...

The Effect of Terminal Velocity on the Time of Descent for a Thrown Object 🔹▪️🔹 If you throw the ball at a speed that is less than its terminal velocity then the ball should take almost exactly the same time to rise as it does to fall. (Ascending and descending time are equal) On the other hand, if the ball is thrown faster than its terminal velocity speed, the ball will take a longer time to fall due to it reaching terminal velocity on the way.(ascending and descending time are unequal). In this case two forces are acting upon the thrown object. This is the concept we are intended to discuss 🍁🍁🍁 Free fall body 1. Falling with Air Resistance As an object falls through air, it usually encounters some degree of air resistance. Air resistance is the result of collisions of the object's leading surface with air molecules. The actual amount of air resistance encountered by the object is dependent upon a variety of factors. To keep the topic simple: it can be said that the two most ...

Q: Sensei ❓Is impulse a vector or scalar? Answer: Impulse is a vector, so a negative impulse means the net force is in the negative direction. 🔹Table of Contents: For better understanding, one should know the answer to the following questions. 1 What is impulse vs momentum? 2 What is impulse with example? 3 Is impulse a vector? 4 What is impulse write its formula? 5 What is called impulsive force? 6 Why is impulse equal to momentum? 7 What is the difference between impulse and force? 8 Why does impulse mean? 9 What is the formula and unit of impulse? 10 What is an example of impulse and momentum? 11 Is impulse a scalar force? 12 What is unit of velocity? 13 What is momentum unit? 14 How do you find impulse? 15 What are 3 examples of impulse? 16 Is impulse a physical quantity? 17 Does impulse increase with time? 18 Is velocity a vector? 19 Is momentum a force? 20 What is impulse of force give one example? 21 Which is an example of impulsive force? 22 Does a m...

Sheeba Nukrish Q: Under  learning by doing methodology can we teach the concept of vectors. Is there any hands-on demonstration that  can be done to make it simple.. 🍁 Solutions: Here's a hands-on demonstration that can make it simpler for learners: ▪️Co-ordinate system Materials needed: A ruler or meter stick A sheet of paper Pencil or pen Colored markers or highlighters Procedure: 1. Begin by explaining the basic idea of vectors. You can define a vector as a quantity that has both magnitude (size) and direction. 2. Draw a coordinate system on the sheet of paper with x and y axes labeled. You can use the ruler or meter stick to create straight lines for the axes. 3. Select a starting point (origin) on the coordinate system and mark it with a dot or an "O." 4. Choose a random point on the coordinate system and mark it with another dot. 5. Using the ruler or meter stick, draw an arrow from the origin to the random point, representing the vector. Explain...