Answer:
0.68 m
Explanation:
We know that the speed of sound in air is a product of frequency and wavelength. Taking speed of sound in air as 340 m/s
V=frequency*wavelength
Then wavelength is given by 350/500=0.68 m
Therefore, to repeat constructive interference at the listener's ear, a distance of 0.68 m is needed
Answer:
The final velocity of the vehicles will be -75km per hour (leftwards).
Explanation:
Let us call , mass and velocity of the truck , mass and velocity of the car, and the final velocity of the vehicles.
The law of conservation of momentum states that
solving for we get:
putting in numerical values
(<em>the negative sign indicates that the vehicles are moving in the leftward direction)</em>
or -75.8 km per hour.<em> </em>
Answer:
Meteorite
Explanation:
A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originated in outer space and survived its passage through the atmosphere to reach the surface of earth.
Id say this is more of a biology question or even a psychology question , well its not a question at all but the endocrine system is a collection of glands that secrete hormones direct to the blood system (circulatory system) to be sent to the desired / target organ , an example of a gland could be the pituitary gland (located towards rear of brain)