This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
Here are the solutions to the questions: 1. Beta particles are Beta particles are high-energy electrons or positrons emitted during radioactive decay. The correct option is D. 2. A kilometre is larger than a millimetre by Step 1: Convert both units to meters. 1 kilometre = 1000 meters = 10^3 m 1 millimetre = 0.001 meters = 10^-3 m Step 2: Find the ratio of a kilometre to a millimetre. 1 km1 mm = 10^3 m10^-3 m = 10^3 - (-3) = 10^6 So, a kilometre is 10^6 (one million) times larger than a millimetre. The correct option is B. 3. Which of the following properties is not correct about photons? They Photons are particles of light. They have zero rest mass, always travel at the speed of light in a vacuum, and are always in motion. Therefore, the statement that they "have mass at rest" is incorrect. The correct option is D. 4. Gravitational field intensity is I. a scalar quantity: This is incorrect. Gravitational field intensity is a vector* quantity, as it has both magnitude and direction. II. greatest at the poles: This is correct. The Earth is an oblate spheroid, meaning the poles are closer to the center of the Earth than the equator, and the effect of centrifugal force is minimal at the poles. III. zero at the centre of the Earth: This is correct. At the center of the Earth, the gravitational forces from all directions cancel out, resulting in a net gravitational field of zero. The correct option is C. 5. The temperature difference of 1 K is equivalent to The Kelvin scale and the Celsius scale have the same size degree increments. This means that a change of 1 K is exactly equal to a change of 1 ^. The correct option is A. Send me the next one 📸