Answer:
A. less
Explanation:
The momentum of an object is directly proportional to it mass and velocity. It is the product of mass and velocity of the object. Given as
So the momentum of car,
Momentum of truck,
We know that, mass of car is less than that of truck and velocity of the two are same. It is implied that, momentum of car will be less than that of truck.
Answer:
In a nutshell, units of A and B are ![\frac{1}{[l]^{2}}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B%5Bl%5D%5E%7B2%7D%7D)
and ![\frac{[l]}{[t]}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Bl%5D%7D%7B%5Bt%5D%7D)
, respectively.
Explanation:
From Dimensional Analysis we understand that 
and 
have length units (![[l]](https://tex.z-dn.net/?f=%5Bl%5D)
) and 
have time units (![[t]](https://tex.z-dn.net/?f=%5Bt%5D)
). Then, we get that:
![[l] = A\cdot [l]^{3}](https://tex.z-dn.net/?f=%5Bl%5D%20%3D%20A%5Ccdot%20%5Bl%5D%5E%7B3%7D)
(Eq. 1)
![[l] = B\cdot [t]](https://tex.z-dn.net/?f=%5Bl%5D%20%3D%20B%5Ccdot%20%5Bt%5D)
(Eq. 2)
Now we finally clear each constant:
![A = \frac{[l]}{[l]^{3}}](https://tex.z-dn.net/?f=A%20%3D%20%5Cfrac%7B%5Bl%5D%7D%7B%5Bl%5D%5E%7B3%7D%7D)
![A = \frac{1}{[l]^{2}}](https://tex.z-dn.net/?f=A%20%3D%20%5Cfrac%7B1%7D%7B%5Bl%5D%5E%7B2%7D%7D)
![B = \frac{[l]}{[t]}](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7B%5Bl%5D%7D%7B%5Bt%5D%7D)
In a nutshell, units of A and B are and , respectively.
The correct answer would be a) head of state.
Chief executives carry out executive orders.
The commander in chief carries out military orders and commands military forces. Leaders of foreign policy deal enforce international policies.
Given:
The speed of sound is 340 m/s
Time for the echo is 5.2 s.
Let h = the depth of the canyon.
Because the sound of your voice travels to the bottom of the canyon and back to your ear, the total distance traveled is 2h.
By definition,
distance = velocity * time.
Therefore
2h = (340 m/s)*(5.2 s) = 1768 m
h = 884 m
Answer: The depth is 884 m.
