Mechanical waves require matter to travel medium. If there is no substance or matter to travel through, mechanical waves cannot propagate.
Since space is mostly vacuum, there is no medium for waves to travel through: waves sent by the sun (electromagnetic waves) are not mechanical waves
The value of relative humidity becomes 100% leading to condensation of water vapor in the air into water droplets or water (dew)
Answer:
the answer is C: neutral objects
First, you’re gonna need to know the basic formulas for velocity and acceleration. You’re also gonna need to know the kinetic formulas it seems like.
v = change in position/change in time
a = change in velocity/change in time
Vf = Vi + at
Vf^2 = Vi^2 + 2a*change in position
Xf = Xi + Vit + 1/2at^2
Question number 1 is just the velocity formula:
98m/10s = 9.8 m/s
Question number 2 also utilizes the velocity formula:
(250m-100m)/10s = 150m/10s = 15 m/s
Question number 11 uses the acceleration formula:
(15m/s - 25m/s)/2s = (-10m/s)/2s = -5m/s^2 now take the absolute value of that to get magnitude
Question number 12 uses the same concept as number 11. Assign a positive or negative sign respectively to the proper direction.
Number 3-10 use the kinematic formulas I mentioned. I’ll do number 3 for you. The mass of the car plays no factor in the distance traveled. We are given the initial velocity of the car, the acceleration of the car, and the final velocity of the car. It says it came to a rest, so that means 0m/s. The only time independent equation is the Vf squared one. Simply plug in the values and solve for the change in position.
0^2 = 20^2 + 2(-5)*(change in position)
0 = 400 - 10*(change in position)
-400 = -10*(change in position)
Change in position = 40 meters
Answer:
Red supergiant.
Explanation:
When our sun is going to become a red giant, it's going to be 256 times larger than itself now.