a baseball is travelling (+30 m/s) and is hit by a bat. it leaves the ball travelling (-40 m/s) what is the change in velocity

What best explains the speed of sound in different states of matter? Sound travels fastest in ice because energy is easier to tr

vagabundo [1.1K]

The speed of sound depends on any form of matter or medium in which sound travels through it and depends on the amount of molecular collisions. Sound travels slowest in gas in the form of steam because the sound has to move around the gas molecules that are far apart making it harder for the energy of vibrations hit the particles and make sound.

Moreover, sound travelling through solids like ice is much faster because the particles are closer together so the sound waves do not have to travel that far making the number of collisions greater and sound spread more easily.

6 0

3 years ago

Read 2 more answers

Why was the idea of plate tectonics difficult for many scientists to accept for many years after it was first introduced?

gayaneshka [121]

It's kind of funny really. The guy who invented the idea in the first place had actually been made fun of because the thought of that happening was improbable in their mind. Also, Wegener ( the guy who invented the idea) was not even a geologist but a meteorologist. But later it had been backed up due to earthquakes being record consecutively in one area, and the graphs turning out differently.

5 0

3 years ago

How long must a simple pendulum be if it is to make exactly six swings per second? (that is, one complete vibration takes exactl

MA_775_DIABLO [31]

The period of a simple pendulum is given by:
$T=2 \pi \sqrt{ \frac{L}{g} }$
where L is the length of the pendulum and g is the gravitational acceleration.

The pendulum in our problem makes one complete vibration in 0.333 s, so its period is T=0.333 s. Using this information, we can re-arrange the previous formula to find the length of the pendulum, L:
$L= g \frac{T^2}{(2 \pi)^2}=(9.81 m/s^2) \frac{(0.333 s)^2}{(2 \pi)^2}=0.028 m$

6 0

3 years ago

__________ forces are not equal, and they always cause the motion of an object to change the speed and/or direction of an object

mrs_skeptik [129]

Answer:

Unbalanced Forces.

Explanation:

6 0

3 years ago

Read 2 more answers

How dose storing waste underground can be effected by ground water in aquifers<br><br>

DiKsa [7]

Answer:

it can contaminate the water

Explanation:

I hope this helps ;)

7 0

3 years ago