🔭 physics

1. **State the problem:** Find the current through the 8 ohm resistor in a circuit containing resistors of 7 ohms, 12 ohms, and 8 ohms, and two batteries of 20V and 15V, using Kirc

1. Let's clarify the problem first. "With laws please" is ambiguous; I will assume you want an explanation of a law in math or physics with steps. 2. For example, consider Newton's

1. State the problem: A humpback whale swims south at one-third of its maximum speed for 12 minutes. Its maximum speed is 645 meters per minute. We need to find the distance the wh

1. The problem states that a helicopter is flying at a velocity of 10.0 meters per second to the west and we need to find how far it will fly in 70.9 seconds. 2. The distance trave

1. **State the problem:** A Bell 222 helicopter with mass 3560 kg is hovering 17 m above the ground. When the engine fails, we want to find the impact velocity when it hits the gro

1. **State the problem:** We are given the kinetic energy (KE) of a baseball as 160 J and its speed as 169.1 km/h. We need to find the mass of the baseball in grams (g). 2. **Conve

1. **State the problem:** We have a bowling ball suspended by a 5-meter rope from the top of an 18-meter building. The gravitational potential energy (GPE) of the ball is 926 J. We

1. The problem asks us to find the gravitational potential energy (PE) of a tungsten rod in low-Earth orbit at an altitude of 2000 km.\n2. The formula for gravitational potential e

1. **State the problem:** We need to find the mass of a gold bar with given dimensions and density. The dimensions are 10 inches long, 3 inches wide, and 1.5 inches high. The densi

1. The problem involves understanding the impact of dropping a pot into a bathtub filled with water and predicting how much the water level will rise. 2. Student A claims the water

1. **State the problem**: Solve the system of equations using substitution: $$2I_1 - 3I_2 + I_3 = 4$$

1. Let's explain the concepts of reflection, refraction, and total internal reflection (TIR). 2. Reflection occurs when light bounces off a surface, e.g., light hitting air-alumini

1. Problem: Understand properties of Wi-Fi signals and related wave concepts. 2. (a)(i) Similarity of Wi-Fi signals at 2.4 GHz and 5.2 GHz:

1. **Problem Statement:** Explain the concepts of total internal reflection, refraction, and reflection with examples using air-aluminium and air-glass boundaries. Also, state two

1. **State the problem:** We are given a filament lamp with a voltage rating of $240$ V and a resistance of $960$ ohms. We need to find the current taken by the lamp and its power

1. Stating the problem: Calculate the resistance $R$ of a 200 m iron wire with resistivity $\rho = 1.6 \times 10^{-7}$ $\Omega$m and circumference $C = 0.02$ m. 2. Find the radius

1. Stating the problem: We need to find the resistance $R$ of a 2000 m long iron wire, given its resistivity $\rho = 1.0 \times 10^{-7} \ \Omega m$ and its circumference $C = 0.02

1. **Problem Statement:** Calculate the resistance $R$ of a 1000 m long aluminum cable with a circumference $C=0.015$ m and aluminum resistivity $\rho=2.82 \times 10^{-8}$ $\Omega

1. The problem is to solve Kirchoff's simultaneous equations using determinants: \[I_1 + 8 I_2 + 3 I_3 = -31\]

1. The problem involves a hexagon with vertices A, B, C, D, E, F and edges AB, BC, CD, DE, BF, AF. 2. Given lengths: AB = BC = a, EF = DE = a, AF = 3W.

1. Problem 3: An electric kettle has a resistance of 30 Ω. What current will flow when connected to a 240 V supply? Also, find the power rating of the kettle. 2. Using Ohm's Law, c