Perhaps this refers to very overweight or very underweight riders ?
A bike has mass, just like any other object.
At less than critical mass, there are fewer "targets" for neutrons to strike, fission, and release more neutrons. As a result, the reaction dies out.
Critical Mass - Catholic rock - was created in 1996.
Critical Mass - Threshold album - was created on 2002-09-02.
Each isotope has a different critical mass. U235 is used because the mass needed to cause a reaction is smaller than almost all other isotopes. This critical mass is calculated as( 3.001 x 9.987 to the 11th power) Divided by the weight of one nuclei X 2.5675 (x 10 to the 24th power) divided by mass. This equals 7.702 X 10 to the 13th power divided by mass. You can tell by this calculation that critical mass for u235 is very low at about 1.3 kg. Best regards, Bruce
We know that critical mass can be achieved in a nuclear reactor. If it could not, we'd not be able to get a chain reaction and generate heat to generate power. Reactors don't have critical mass when the control rods are in, but pull the rods, start the reactor up and away you go!
In Marvel Comics, a critical mass refers to the minimum amount of a particular substance or energy required to achieve a certain effect or power. It is often used in reference to characters who can manipulate or generate vast amounts of energy, like the Hulk or Nova. When a character reaches their critical mass, they typically unleash a massive display of power.
The critical mass depends on the shape; I don't think there is an upper limit to that.For the case of a sphere, the critical mass for U-235 is 52 kg. The corresponding diameter of the sphere is 17 cm.
No. Heavy Water moderated reactors like the CANDU type can go critical and run on natural (0.72%) Uranium just fine.
kingpen
Critical Mass - 2001 is rated/received certificates of: Australia:M Germany:16 New Zealand:M USA:R
Critical Mass is a mutant in the video game Spider Man and the Web of Shadows. He grills Spider Man with questions about his past.