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Which of the following statements about Rutherford’s model of atom are correct? (i) Considered the nucleus as positively charged. (ii) Established that the a-particles are four times as heavy as a hydrogen atom. (iii) Can be compared to solar system. (iv) Was in agreement with Thomson’s model.
(d) Rutherford model only established that the nucleus is positively charged. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
(d) Rutherford model only established that the nucleus is positively charged.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
See lessWhat are the steps to fix common bicycle problems like squeaky brakes or loose parts?
To fix squeaky brakes, clean the pads and rims, and ensure proper alignment of brake pads with the rim. Apply brake lubricant for smooth operation. For loose parts, tighten bolts and screws using wrenches or spanners. Check the chain regularly for rust or slack, cleaning and oiling it as needed. AddRead more
To fix squeaky brakes, clean the pads and rims, and ensure proper alignment of brake pads with the rim. Apply brake lubricant for smooth operation. For loose parts, tighten bolts and screws using wrenches or spanners. Check the chain regularly for rust or slack, cleaning and oiling it as needed. Additionally, inspect tyres for air pressure and punctures. Following these steps ensures a safe and well-maintained bicycle.
See lessHow can the alignment of a bicycle’s wheels be checked and fixed?
To check wheel alignment, spin the wheel and observe for wobbling or irregular motion. Misalignment can be fixed by adjusting the tension in spokes using a spoke wrench. Tighten or loosen the spokes evenly to straighten the wheel. If the issue persists, seek assistance from a bicycle mechanic. RegulRead more
To check wheel alignment, spin the wheel and observe for wobbling or irregular motion. Misalignment can be fixed by adjusting the tension in spokes using a spoke wrench. Tighten or loosen the spokes evenly to straighten the wheel. If the issue persists, seek assistance from a bicycle mechanic. Regularly checking and maintaining wheel alignment ensures stability, reduces wear on tyres, and improves overall riding performance.
See lessHow do wheels and axles help balance and move heavy loads? Provide real-life examples.
Wheels and axles simplify moving heavy loads by reducing friction and distributing weight evenly. This system allows smooth and balanced movement. Real-life examples include carts used for transporting goods, bicycles for commuting, and wheelbarrows for carrying construction materials. In each case,Read more
Wheels and axles simplify moving heavy loads by reducing friction and distributing weight evenly. This system allows smooth and balanced movement. Real-life examples include carts used for transporting goods, bicycles for commuting, and wheelbarrows for carrying construction materials. In each case, the axle serves as a pivot point, while the wheels ensure effortless rolling, demonstrating the efficiency and practicality of this simple machine in everyday tasks.
See lessWhat is the role of a propeller in a toy boat? Explain its mechanism.
A propeller in a toy boat functions by spinning and pushing water backward, generating thrust that propels the boat forward. The rotational motion, powered by an elastic band or small motor, creates a continuous flow of water, enabling movement. This mechanism demonstrates Newton’s third law of motiRead more
A propeller in a toy boat functions by spinning and pushing water backward, generating thrust that propels the boat forward. The rotational motion, powered by an elastic band or small motor, creates a continuous flow of water, enabling movement. This mechanism demonstrates Newton’s third law of motion, where the backward push of water results in the forward motion of the boat. Propellers showcase simple machine principles effectively in toy-making.
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