Answer:
The railroad is 20,63 m height.
Explanation:
In this problem we have two objects that encounter on a given time that is the same for both objects.
Objects are:
The car moves in constant velocity of 19 m/s. The car makes a trajectory of 39 mts before encounter the bolt that hits the windshield.
Then, for the car we need to find the time that takes to make the trajectory, and we use the formula for uniform rectilinear motion (URM):
where v is velocity, s is space or trajectory, and t is time.
The time t=2.052 sec is the time that takes the bolt to fall and hit the windshield, so, we have to take this time and replace it in following formula that applies for <em>free fall objects:</em>
Answer:
The mile
Explanation:
this is calculated using the metric system in kilometers..
Density can be calculated using the following rule:
Density = mass/volume
We are given that:
mass = 41 grams
volume = 5 cm^3
Substitute with the givens in the above equation to get the density as follows:
Density = 41/5 = 8.2 g/cm^3
Based on the above calculations:
answer : 8.2
units : g/cm^3
Answer:
a) their amplitudes are the same their phase difference is constant their frequencies are the same
Explanation:
Coherent waves are the waves that have constant phase difference, equal frequency, amplitude and waveform.
Frequency denotes the number of cycles a wave completes in one second.
Amplitude is the maximum height that the wave reaches.
Waveform is the two dimensional representation of a wave in graphical form.