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 […]

How does Mildred die?

How does Mildred die? Montag finds Mildred passed out, having overdosed on thirty plus sleeping pills. Her stomach is pumped and her blood re-circulated. The next morning she doesn’t remember any of it. Why can’t Montag run away? Physically, Montag is unable to run as fast as he would like because of his confrontation with […]

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? […]

Is entropy the same as chaos?

Is entropy the same as chaos? Entropy is the measure of disorder in a system. Chaos is another word for disorder. Entropy is a measure of how likely the system will be in a certain macrostate, because of how many microstates correspond to it. It is also a measure of how much the energy is […]

When we push a wall no work is done?

When we push a wall no work is done? In this case the wall does not displace from its position even though the force is applied and since displacement is zero work done is said to be zero. Is pushing against a wall work? Note that forces without motion do no work. For example, if […]

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