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Questions in physics

[Homework Help] An old person moves on a semi-circular track of radius 40.0 m during a morning walk. If he starts at one end of the track and reaches the other end, find the distance covered and the displacement of the person.

[Homework Help] Select the best answer for the question. 19. Which one of the following accurately describes the universal gravitational law? A. Solid bodies attract other solid bodies, but liquid and gas don't participate in universal gravitation. B. Objects with small masses have more gravitational attraction to each other than objects with large masses. C. Every object that has mass attracts other objects within a million-mile radius. D. As the distance between any two bodies increases, the gravitational force between them decreases.

[Homework Help] Shoes with soles made of synthetic soft rubber... A. can provide a good grip on dry walking surfaces. B. can provide a good grip on wet walking surfaces. C. may slip in wet conditions. D. Both A and C are correct. E. All of the above are correct.

[Homework Help] 1. Convert 25°C to Fahrenheit. 2. Convert 98.6°F to Celsius. 3. Convert 300 K to Celsius. 4. Convert -40°C to Fahrenheit. 5. Convert 212°F to Kelvin. Hint: Key conversion formulas for temperature between Celsius (°C), Fahrenheit (°F), and Kelvin (K): Celsius to Fahrenheit: °F = °C × (9/5) + 32 Fahrenheit to Celsius: °C = (°F - 32) × 5/9 Celsius to Kelvin: K = °C + 273.15 Kelvin to Celsius: °C = K - 273.15

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] Kaya collects the data shown in the table. | Quantity | Value | |---|---| | Voltage | 6.0 V | | Current | 0.3 A | | Resistance | What is the resistance in the circuit? A. $0.05 \Omega$ B. $1.8 \Omega$ C. $5.7 \Omega$ D. $20 \Omega$

[Homework Help] [Clean the question above and then proceed with classification]

[Homework Help] A girl pours hot water into a bottle and a Thermos flask. She notices that the bottle gets hotter than the Thermos flask. (a) By what process does heat from the water in the bottle reach her hand?

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] A metal box and a wooden box having the same weight are moved on the same surface by equal forces. In your opinion, which of them will experience greater friction? Justify your answer.