Why did Dave bite through the traces? They are attacked by starving dogs from the neighboring Indian village because the dogs could smell the food they were carrying. He bites through Sol-leks traces, the dogs pull away without the sled, and Dave stands in his proper place. So they hook Dave back into the trace. […]
Why was the plum pudding model wrong?
Why was the plum pudding model wrong? He argued that the plum pudding model was incorrect. The symmetrical distribution of charge would allow all the α particles to pass through with no deflection. Rutherford proposed that the atom is mostly empty space. The atom now consisted of a positive nucleus with negative electrons in circular […]
When a cannonball is fired from a cannon?
When a cannonball is fired from a cannon? This is called the principle of conservation of momentum . Momentum is conserved in collisions and explosions . Conservation of momentum explains why a gun or cannon recoils backwards when it is fired. When a cannon is fired, the cannon ball gains forward momentum and the cannon […]
Which is the rarest Group 1 element?
Which is the rarest Group 1 element? francium Do all group 1 elements react vigorously with water? All the alkali metals react vigorously with cold water. This shows that the reactivity of the alkali metals increases as you go down Group 1. What is the trend as we go down Group 1? Explaining the trend […]
Are Heavier arrows more accurate?
Are Heavier arrows more accurate? All factors remaining equal, heavy arrows always are more reliable, more durable, than lighter. More material, with additional layers of carbon material, equal more strength when subjected to abuse such as bone impacts or when shot into rocky ground or bounced off trees following misses. What happens if arrow spine […]
When we push a wall no work is done?
When were V1 and V2 rockets used?
When were V1 and V2 rockets used? These were successful in destroying 3,500 V1 missiles. V2 rockets were first launched against England in September 1944. Over the next few months, nearly 1,400 struck London. Who invented German rockets? Wernher von Braun Who created the first missile? Walter Dornberger Who was the first head of NASA? […]
What is a healthy relationship with family?
What is a healthy relationship with family? In healthy family relationships, people trust and rely on each other for support, love, affection and warmth. Families often share common goals and work together to reach those goals (for example, children and young people may help their families get the dinner dishes done so that everyone can […]
How many deaths have self-driving cars caused?
How many deaths have self-driving cars caused? How many deaths have self-driving cars caused? (Gasgoo) So far, there have been two pedestrian fatalities. One was caused by an Uber vehicle, and the other by a Tesla AV. Additionally, four AV drivers died in self-driving car accidents. Has a self-driving car killed anyone? Uber chose not […]
Why is the surface perfection of glass fibers so important?
Why is the surface perfection of glass fibers so important? The surface perfection of glass fibers is important because surface flaws or cracks will act as points of stress concentration, which will dramatically reduce the tensile strength of the material. Care must be taken not to rub or abrade the surface after the fibers are […]