Answer:
electromagnetic waves can travel through a vacuum where as mechanical waves have to have a medium to travel
Explanation:
Answer:
D
Explanation:
30 m/s is the hypothenuse. The horizontal component will be x. Using trig, you can see that
The answer is D
The reason being because the singular replacement has the first letter of each side swap
For Example: A+BC —> B+AC
Answers:
a) 122.5 m
b) 50 m
Explanation:
Here we are dealing with projectile motion, where we can use the following two equations that model the parabolic motion of the stone after being thrown from the window:
(1)
(2)
Where:
is the height of the stone when it hits the ground
is the initial height of the stone
is the initial velocity of the stone
since we are told the stone was thrown horizontally
is the time the stone is in air
is the horizontal distance the stone travelled
Knowing this, we can answer the questions:
a)Initial height of the stone:
In this case we will isolate from (1):
(3)
(4)
(5) This is the initial height
b) Horizontal distance:
In this case we will use equation (2):
(6)
(7) This is the horizontal distance
Answer:
1.43602666666666666666666666666666666666666666666666666 × 10^9 Miles^3
Explanation:
It's the volume of a sphere of radius 1700 miles.
Vol=4pi*r^3/3
V=4/3*3.14*1700^6 = 1.43602666666666666666666666666666666666666666666666666 × 10^9 MI^3