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.
- An object that is 5mm (1mm=0.001m) long looks 10cm long underneath a microscope. What is the magnification of this microscope? Remembertheequotionformagnincodellionthenumerticaoficotion=mognifiedsizeofobjectdiv realsizeofobjectMeg Remember to convert one of the lengths to the unit the other length is it? 10cm=mm
- A magnetic field is __ at one end of a bar magnet. What one word completes the sentence?
- (b) Anna says Because I stopped for drinks, my average running speed was faster than 6 kilometres per hour. Give one reason to support Anna's statement. __ [1] ........... 16 The volume of a piece of wood is 620cm^3 Its density is 0.85g/cm^3. Work out its mass.
- All work should be done on your own sheet of paper. Some of the answers are provided so that you can check your work. Kinematics & Free Fall Problems - lyeranti moore 1. Define each of the following physical quantities in your own words. Indicate what units are used to measure each quantity in the SI system. Displacement: Velocity: Acceleration: 2. A car travels 17 km due east then does a U-turn and travels 23 km due west. a) What total distance has the car traveled? b) What is the total displacement of the car? c) If the entire trip took 2.0 hours, determine the average speed of the car. Give your answer in both km/hour, and m/s (show conversion) d) If the entire trip took 2.0 hours, determine the average velocity of the car. Give your answer in both km/h and mph. (show conversion) 3. Write down each of the following formulas: a) Constant speed motion b) No'v' formula c) No'd' formula d) No't' formula e) No'a' formula For each of the following problems be sure to:List known & unknown quantities, write the formula, box answer with 2-3 significant digits and correct units. 4. A car decelerates uniformly from 24m/s to 18m/s in 3.0 seconds. How far does it travel during this time? d=63m 5. A car is initially traveling at 17m/s when the driver steps down hard on the gas pedal resulting in an acceleration of 3.0m/s^2 How fast will the car be moving 4.0 seconds later? v=29m/s 6. A car initially traveling at 24m/s slams on the brakes and moves forward 196 m before coming to a complete halt. What was the magnitude of the car's deceleration? a=1.47m/s^2 7. A bike that is coasting down a steep hill increases its speed from 8.0m/s to 14m/s The length of the hill is 55 meters. How much time passes during the descent? t=5s 8. How long does it take a hiker to walk 7.0 miles if her average speed is 2.0 miles per hour? t=3.5hr 9. Ifa car's brakes can decelerate the car at a rate of 8.0m/s^2 what is the minimum stopping distance of a car that is initially traveling 20.0m/s d=25 m
- 6 Some resistors are connected in series with a battery. When more resistors are added in series, the total resistance increases. Complete the sentences. Choose answers from the box. Each answer may be used once, more than once or not at all. [2 marks] decreases increases remains the same When the number of resistors increases, the potential difference across each . resistor __ When the number of resistors increases, the current in the A sdi circuit __ one (v) HOIT