🔭 physics

1. **State the problem:** Calculate the electrostatic force between a +5.0 C charge and a +9.0 C charge separated by 4 m using Coulomb's Law. 2. **Formula:** Coulomb's Law is given

1. **Stating the problem:** We have a thermometer showing a temperature between -10°C and -20°C, closer to -10°C, approximately at -13°C. 2. **Understanding the thermometer scale:*

1. The problem asks: What temperature does the thermometer show? 2. Since the problem does not provide any numerical data or image, we cannot determine the temperature value.

1. **State the problem:** We have two radioactive samples with given amounts over time. Sample 1 starts at 800 mg and decreases to 400 mg after 1 month. Sample 2 starts at 1000 mg

1. **Problem statement:** We want to find the work function $\phi$ and its uncertainty $\Delta \phi$ from the equation $$E = h \nu - \phi$$ given the measured values with uncertain

1. **Problem Statement:** Understand the kinetic theory of gases and interpret changes in an ideal gas on a pressure-volume (P-V) diagram. 2. **Concepts and Formulas:** The kinetic

1. **State the problem:** Amy's toy rocket is launched straight up, and its height over time is modeled by a downward-opening parabola. We need to find when the rocket is on the gr

1. **Problem Statement:** Two planes, a Cessna and a Boeing 747, are flying toward the same intersection point at the same altitude. The Cessna is 100 miles north of the intersecti

1. The question "what is the power?" is ambiguous without context. 2. In physics, power is defined as the rate at which work is done or energy is transferred.

1. **مسئله را می‌نویسیم.** یک تکه یخ با جرم $400-42=358\,g$ را داخل آبِ $0^\circ C$ می‌اندازیم. پس از برقراری تعادل، جرم یخ باقی‌مانده $410\,g$ می‌شود. دمای اولیه یخ را می‌خواهیم.

1. **صورت مسئله:** یک گرمکن می‌تواند دمای جرم $m$ از آب را در $30$ ثانیه، بدون تغییر حالت، به اندازه $60^\circ C$ بالا ببرد.

1. The problem asks to state another term for "quantity of motion." The answer is momentum. 2. The two factors used to determine the momentum of an object are mass and velocity.

1. **State the problem:** We need to solve the equation given by Kirchhoff's voltage law for the current $I$ in a series circuit: $$7.8I + 8.2I - 12.8 = 0$$

1. **Problem statement:** We have a series circuit with total resistance $R_{total} = 25\ \Omega$ and voltage drop across the battery $V = 6.0\ \text{V}$. We need to find: (a) The

1. **State the problem:** We are given the position function of a ball rolling down an inclined plane as $$s(t) = 2t^3 + 3t^2 + 4$$ where $s(t)$ is the distance in cm and $t$ is th

1. **Problem stated:** Draw a car and give a physics example using it, like torque. 2. **Torque formula:** The basic formula for torque is $$\tau = rF\sin(\theta)$$.

1. **Problem:** Describe how a buoy anchored to the ocean floor moves as a wave passes by. 2. **Understanding wave motion:** Ocean waves are typically surface waves that cause wate

1. **Problem 1: Calculate the speed in Km/h of a runner who runs 100 m in 9.58 s.** 2. The formula for speed is $$V = \frac{e}{t}$$ where $e$ is distance and $t$ is time.

1. **Problem:** An engineer is testing a new free-fall ride with mass $m=500$ kg dropping from height $h=40$ m. 2. **Energy types halfway down and at the bottom:**

1. **State the problem:** We want to understand what happens to Earth's orbit if it is moved farther from the Sun in a simulation. 2. **Relevant concept:** According to Kepler's Th

1. **Problem statement:** Why does the Moon stay in orbit instead of falling to Earth? 2. **Explanation:** The Moon stays in orbit because it is moving forward with a tangential ve