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According to Einstein's theory of relativity the speed of gravity is equal to the speed of light; i.e. about 671 million miles per hour.

Note that this is still true in models for quantum gravity; there gravity is mediated by a massless particle and all massless particles have to travel at the speed of light.

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Are speed and average speed different?

Yes, because average speed is all of the different speeds added together and then divided by how many speeds there are (ex: 70 mph + 60 mph = 130 mph. 130 mph divided by 2 = 65 mph (which is the average speed)) and speed is just how fast an object is moving (ex: 80 mph is the speed of something going 80 mph).


If a car travels 120 mph in 2.0 hours. What is the speed?

The speed of the car is 120 mph. Speed is a measure of how fast an object is moving over a specific distance, so regardless of the time taken to travel a certain distance, the speed of the car remains constant at 120 mph.


How fast does a skydiver fall?

Speed during free fall can change depending on a skydiver's size and body orientation. In the belly to earth orientation, the speed is about 120 mph. If the skydiver is wearing a wing suit, their vertical speed could be as low as 60 to 70 mph. In a head down orientation, the speed can often be greater than 200 mph.


How fast does the tvr cerbera speed 12 go?

The TVR Cerbera Speed 12 was claimed to have a top speed of over 240 mph (386 km/h) during its development. However, the car was never officially tested to achieve this speed.


How does an object's speed differ from its velocity?

Speed is a scalar magnitude (it only tells you how much). Velocity is composed of the object's speed and the direction in which it's moving. This corresponds to the definition of a vector.Using "miles" and "hours" as an example:"30 miles per hour (mph) " is a speed"30 miles per hour (mph) north" is a velocity"30 mph north" and "30 mph east" are different velocities with the same speed."30 mph north" and "35 mph north" are different velocities/speeds with the same direction.If you add "30 mph" plus "30 mph", you get 60 mph ... maybe.If you add "30 mph north" plus "30 mph south", you get standing still.If you add "30 mph north" plus "30 mph east", you get 42.426 mph northeast, using vector calculations.Therefore, when a vehicle travels on a winding road maintaining a speed of 30 mph, its speed remains the same but its velocity is changing with each turn.