lift it onto some weighing scales
pick it up
Comparing the density of an object with that of a liquid will determine whether the object will float or sink in the liquid. If the object is less dense than the liquid, it will float; if it is more dense, it will sink.
Assuming the object's moving rapidly enough to affect the light from it observedly: If approaching the light will be biased to blue (higher-f, lower wavelength); If receding, the light will be redder (red-shift), or lower-f, longer wavelength) by Doppler effect. If the true spectrum can be determined then the shift either way can be used to calculate the object's speed relative to the observer (not necessarily its true speed!).
Light reflects off an object because of the interaction between the incoming light waves and the surface of the object. The smooth surface of an object allows light waves to bounce off in a predictable manner, following the law of reflection. This reflection is what allows us to see objects, as the light that reflects off them enters our eyes.
The speed of an object tells you how fast it is moving. It does not provide information about the direction of the object's motion or whether it is changing direction. To fully describe an object's motion, you would need to also consider its velocity, which includes both speed and direction.
The color black. That is the reason that if it is very hot outside people tell you to wear brite colors. Thereason that they say that is because bright colors reflect the sunshine and black atracts the heat of the sun.
A rainbow appears
how can you tell if an object is reflecting blue light from a star
density
Comparing the density of an object with that of a liquid will determine whether the object will float or sink in the liquid. If the object is less dense than the liquid, it will float; if it is more dense, it will sink.
The crack on the table was caused by a heavy object being dropped on it.
It is impossible to tell; whether an object floats or sinks depends on its density, not on its weight.
your finger can tell when an object is hot or clod because when a stimulus (the object) touches your skin, receptors transmit it to the brain and your brain sends a reflex reaction to let go
It really depends on the size, for normal sized keep it not too light but not too heavy you can tell by doing this : spin your bey if it hits an object and stops spinning in one hit it is too light if it wobbles too much it is too heavy if you get it right it will spin for 1 minute like mine
heavy breathing and light headedness
Touch is probably the most fitting.
No. If you take the light bulb out of the microwave oven, then you can't tell by looking at it whether or not it's running.
Pedestrian Signal