Answer:
Some stars in space can come to life causing humans to be amazed but at thesame time in great/critical danger.
Answer:
The marble at its highest point are hmax= 1.39 meters above the floor.
Explanation:
hi= 1m
V= 3m/s
Vx= 1.1 m/s
Vy= ?
α=cos⁻¹(1.1/3)
α= 68.48º
Vy= V * sin(α)
Vy= 2.79 m/s
Vertical Velocity in highest point are Vy(hmax) = 0
Vy(hmax)= Vy - g*t
t= Vy/g
t= 0.28 sec
t : time to get the highest point
hmax= hi + Vy*t - g*t²/2
hmax= 1.39 m
Answer:
A sonar device sends pulses of sound waves down through the water. When these pulses hit objects like fish, vegetation or the bottom, they are reflected back to the surface. The sonar device measures how long it takes for the sound wave to travel down, hit an object and then bounce back up.
Answer:
should be A
Explanation:
there isn't a 3, so it must be his deceleration, which would be 5-3=2
Answer:
the total acceleration decreases when a body falls until it reaches the value of zero.
Explanation:
In general, resistive forces always oppose the movement of bodies, when a body falls into the air it is subject to two forces, the gravitational attraction and the resistive force of the air that opposes this movement, this force is proportional to the speed and the size of the body increases its value until it equals the acceleration of gravity and from this moment the body moves with constant speed.
In summary, the total acceleration decreases when a body falls until it reaches the value of zero.