Relativity Questions

• Can gravity form waves?
• Can you go fast enough to get enough mass to become a black hole?
• Does time go faster at the top of a building compared to the bottom?
• How can we travel to the past?
• How does a black hole give off light?
• How is a magnetic field just an electric field with relativity applied?
• Is a black hole a 2D or a 3D object?
• Is the reason that nothing can go faster than light because we have not tried hard enough?
• Light has no mass so it also has no energy according to Einstein, but how can sunlight warm the earth without energy?
• What would happen if you drove your car close to the speed of light and turned on the headlights?
• Why is the speed of light a random finite number?
• Why is time frozen from light's perspective?