Physics Homework Aid
Physics holds significant importance among the natural sciences, elucidating life's wonders and ranking among the most challenging subjects to master.
QuestionAI is a rich and user-friendly physics problem solver for novice physicists, enabling exploration of atomic properties and interactions, alongside molecular trajectories under various forces. Furthermore, you can delve into the mysteries concealed amidst galaxies with fellow physics enthusiasts. Boldly pose your conjectures and queries to the AI, and authoritative answers will readily emerge.
- (c) 80% of this change in gravitational potential energy has been transferred to the student's kinetic energy store. How much has the student's kinetic energy store increased after falling 20.0 m? Kinetic energy gained= (d) Calculate the speed of the student after falling 20.0 m. Give your answer to two significant figures. __ (e) At the lowest point in the jump , the energy stored by the stretched bungee cord 24.5 kJ. The bungee cord behaves like a spring. Calculate the spring constant of the bungee cord. Use the correct equation from the Physics Equation Sheet. __ ...................................................................... Spring constant=
- The student repeated the investigation but wrapped insulation around the iron block. What effect will adding insulation have had on the investigation? [2 marks] Tick (surd ) two boxes. The calculated specific heat capacity will be more accurate. square The iron block will transfer thermal energy to the surroundings at a lower rate. square The power output of the heater will be lower than expected. square The temperature of the iron block will increase more slowly than expected. square The uncertainty in the temperature measurement will be greater. square
- Here are two cubes, A and B. Cube A has a mass of 81 g. Cube B has a mass of 128 g. __ Work out the density of cube A : the density of cubc B Give your answer in the form a:b where a and b are integers.
- The diagram below shows a bowl used for making ice cream. The walls of the bowl contain a liquid coolant. The bowl is cooled to -20^circ C before the mixture is put in the bowl. The bowl causes the mixture to cool down and freeze. (c) Explain why the different thermal conductivities of metal and plastic are important in the design of the bowl. __ disappointed Motal (d) The liquid coolant has a freezing point below -20^circ C Explain one other property that the liquid coolant should have.
- Question 18 of 20 Fill in the blank Particles in a metal are held together by __ attractions. Enter your answer