General and Special Relativity

Mass changes how time passes near it, versus how it passes far from it. Test objects are still seen to speed up as they fall towards massive objects. Light suffers "Shapiro time delay" when its path includes travelling through space that is near a massive body. So I guess the full answer requires you to tell us who is deciding what is slowing down, and how / where you are measuring relative to.

Concept

If you increase the force on an object, its acceleration also increases, assuming mass remains constant. This relationship is described by Newton's second law of motion, which states that the acceleration of an object is directly proportional to the force applied to it and inversely proportional to its mass.

Here's one way of looking at it: you have to consider the problem from two different frames of reference. Let's set one as a spaceship accelerating at some speed above 0.5c. The other will be a rest frame, the inertial frame from which the ship departed. Each frame contains an identical clock. Each clock, tested before separation, ticks off identical seconds. If I send the ship out and back at high acceleration, then compare the elapsed time on both clocks, I will find that the times vary. Seconds on the moving clock were stretched when compared with those of the rest clock, though time appeared to pass normally on the ship. Consider all of this in terms of fuel consumption. From my frame of reference within the ship, all clocks run normally, so I register a constant fuel consumption for what I expect to be constant acceleration. But from the external (rest) frame, I can calculate that the moving clock has stretched each second in proportion to each increase in speed by the Lorenz time dilation factor, so I record the ship's fuel consumption as being stretched over longer and longer intervals as the ship accelerates. In fact, what is perceived in the ship as constant fuel usage appears to be decreasing usage from the rest frame. It will take longer and longer intervals (or an increasing rate of fuel consumption) to accomplish each increasing increment of velocity as the same amount of energy is expended over increasing intervals. From the ship, I see progressively smaller increases in velocity from the same rate of fuel expenditure. By any method of measurement, this equates to an increase in mass. It appears to take progressively more energy to accelerate the ship by any given increment.

I think you would know what's going on and initiate an attempt to rotate yourself to the position you desired. But unless you were an experienced diver, I'm not so sure you could implement the physical motions required to accomplish the rotation you wanted in just a few seconds ... I think that would take some experimentation.

Currently, there really isn't anything that can move faster than the speed of light, man-made nor natural, possibly not even alien. In theory, warp drives would work, but would require enormous amounts of fuel, which we currently do not have. Also, in order to move faster than the speed of light, you would have to accelerate some constantly to move at the speed of light. The faster something travels, the harder it is to move it faster. Consider this: If you are pushing a stroller with, lets say, a Rubik's Cube inside it, then continue to push it faster and it will be increasingly harder and harder to accelerate the item. Soon you'll be pushing a car, then a skyscraper, soon the mass of the moon and then the mass of the sun and whatnot. Which means the faster an object moves, the more mass it has and the more force it will require to accelerate it. Now, at the speed of light, the object would be at infinite mass, therefore infinite force, to continue to push it, which does not exist in a finite universe.

To drive onto a moving object (as, for example, up a ramp onto a moving trailer), you must be going faster than the object to move forward up the ramp, but when you come to a stop relative to the object, you will be moving with the object, so must be moving at the same speed. You must, in fact, decelerate to a stop on the object, or your faster approach speed would carry you through and beyond it.

The c2, which is the speed of light squared, is the conversion factor when making the conversion between mass and energy or vice versa. We see that E = mc2 and we can move the c2 to the other side. It will then be E/c2 = m. Whatever you're going to do, that is, whatever conversion you make, the c2 is the conversion factor in the operation.

Two observers could measure a different speed for the same moving object if they are moving at different velocities relative to the object. This is because the speed of an object would appear different depending on the speed and direction of the observer. This effect is known as relative motion.

The wave theory of light best explains interference phenomena, where light is considered to propagate as a wave. This theory posits that when two waves overlap, they can either reinforce (constructive interference) or cancel out (destructive interference) each other depending on their relative phases. This accounts for the patterns observed in interference experiments.

in a wave there are some points which vibrate with maximum amplitude these points are called antinodes.pressure at\on these points is minimum hence they are also called pressure nodes.

If the spring is cut in half, it will have half the original stiffness. So, when 12 N is suspended from the cut spring, it will stretch twice as much as before - 20 cm.

The classic example is that people generally are willing to commute 20 minutes from home to work. In the Medieval city this meant working within a 20 minute walk of your home, or less than a mile. In today's city, figuring 60 mph, it can mean 20 miles.

Another classic example is in the transport of goods. When it took 5 months to import something from China to the USA, the item was a rare commodity. Silk may have been a luxury item, but it wasn't part of the culture. Today it takes days to get a product from China to the USA, so China's products are a part of our everyday culture.

The minimum initial speed for a projectile to escape Earth's gravitational pull (escape velocity) is about 11.2 km/s. This speed is independent of the mass of the projectile and is based on the balance between the projectile's kinetic energy and gravitational potential energy. Any speed greater than the escape velocity will allow the projectile to escape Earth's gravitational pull.

Albert Einstein is best known for developing the theory of relativity, which fundamentally changed the way scientists think about space, time, and gravity. His equations laid the foundation for modern physics and led to incredible advancements in our understanding of the universe.

The principle of relativity means that physical measurements are independent of an observer's velocity.

Or perhaps you are referring to the Theory of Relativity; since this is a complicated topic, better read the corresponding Wikipedia article.

There is no absolute hard and fast definition. But I would say coal, oil, and natural gas, and hydro are conventional. Wind, solar, tidal, and biomass non-conventional. I'm not sure about nuclear.

Time is key in esterification reactions as it allows for the formation of ester bonds by the reaction of a carboxylic acid and an alcohol. The reaction typically requires time to reach completion and achieve high yields of ester products. Longer reaction times can also lead to side reactions or hydrolysis of ester bonds in certain conditions.

Einstein developed the theory of relativity through a series of thought experiments and mathematical explorations. He published his special theory of relativity in 1905, followed by the general theory of relativity in 1915, which revolutionized our understanding of space, time, and gravity. Einstein's theories were built on the principle that the laws of physics are the same for all non-accelerating observers, and that the speed of light in a vacuum is constant for all observers.

Sound is measured in units called decibels (dB). Decibels quantify the intensity or loudness of sound and are used to compare different levels of sound from quiet to loud.

The word "theory" in science doesn't mean a guess. It means an idea that has been very well confirmed and has stood the test of time. The same applies to biological evolution, which has stood the test of time even longer than relativity.