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.
- 3 3 The braking distance of a car is directly proportional to its initial kinetic energy. The braking distance of a car is 18m when its initial speed is 10ms^-1 What is the braking distance of the car under the same conditions when its initial speed is 25ms^-1
- 1. A natural phenomenon that illustrates the dispersal of light is A. an echo. B. an eclipse. C. a rainbow. D. a rainfall. 2. Canned foods and drinks have expiry dates on them. The hazard involved in taking an expired drink is A. food poisoning B. impaired hearing. C. suffocation. D. poor circulation of blood. 3. Which of the following sets of devices operate on the principle of magnetism? A. Louds peakers, compass, alarms B. Loudspeakers, alarms, LCD TV C. Compass,loudspeakers, LCD TV D. Compass, alarms, LCD TV 4. A hunter experiences a backward force upon firing a gun. Which of the Newton's laws of motion is demonstrated in the situation? A. First law B. Second law C. Law of inertia D. Third law 5. A bowl of water on a gas stove was initially cold. It became warm after sometime. What was the mode of heat transfer in the water? A. Conduction B. Radiation C. Convection D. Emission
- 12 Which of the following natural cyclesdirectlyinvolves the sun? I. Carbon cycle Water cycle III. Nitrogen cycle C. Ionly I and II only 1. II and III II and III only 23. When a stick is dipped into a pool of water, it appears to A. bend towards the surface. bend away from the surface. C. be longer than its length. D. be seen straight in the water. 24. The building block of a material with the smallest unit of matter that retains the properties of an element is A. an ion. an atom. C. a proton. D. a molecule. is Digestion of rice in humans starts from the A. colon. B. gullet. C. stomach. D. mouth 26. A mother took her child to the hospital and upon investigation, it was noticed that the child's diet was lacking in zinC. What could this result in? L Decreased growth in the child IL Anaemia and constipation III. Inability of the body to fight infection A. I and II only I and III only C. 1. II and II D. II and III only 27. In making ornaments and jewellery, non-reactive metals are preferred because they A. are corrosive. are attractive. C. do not react with atmospheric oxygen. D. do not retain their lustre. 28. A metallic laddle was left in a boiling soup. After sometime, the handle became bot. This is because the particles in the laddle A. circulate as a result of the temperature differences. B. contain free electrons which are able to transfer heat energy. C. undergo rapid, random motion. D. are separated by large distances.
- 12 29. Which of the following elevents her four electron shells? C (}_{15)P D. (}_{5)B Use this information to answer questions 30 to replace a 20 W bulb with a 50 W bulb. 30. The unit inscribed on the bulb measures its A. workdone. electricity. C. power. D. energy. 31. The SOW bulb is likely to 1. increase the brightness in the room. II. increase the amount of electricity consumed. III. destroy the habitat of pestx A. I and II only I and III only B. 1. II and III D. II and III only 32. Two unknown solutions labelled A and B were brought to a JHS 3 class. It was observed that in solutio red litmus paper changed colour to blue, whiles in solution B, red litmus paper retained its colour, Mr could be the content of solution A? A. Car battery fluid B. Salt solution C. Orange juice D. Baking soda 33. Which of the following nursery beds is suitable for a flood prone area? A. Flat bed B. Sunken bed C. Plain bed D. Raised bed 34. The portion of air which acts as a solvent is A. an inert gas. B. carbon (IV) oxide. C. oxygen. D. nitrogen. 35. Which of the following pairs of energy sources is environmentally friendly? A. Biogas and thermal energy B. Wind and biogas C Coal and thermal energy D. Wind and coal
- Decreasing the AMPLITUDE of a loudspeaker makes the sound it produces... lower pitched quieter louder higher pitched