Animals have a food chain. (sorry for my bad English)
Answer:
D. Scientists use satellites to map a coastline.
Answer: False
explanation: because Total momentum is conserved only if the collision can be considered isolated from the influence of net external forces
Answer:
44.1 m
Explanation:
The vertical motion of the projectile is a free fall motion, so it is a uniform accelerated motion. This means that we can use the suvat equation:
where
, taking downward as positive direction:
s is the vertical displacement
u = 0 is the initial vertical velocity of the projectile (it is fired horizontally)
t is the time
is the acceleration of gravity
We know that the projectile hits the ground at
t = 3.0 s
Therefore, by substituting this value into the equation, we find the vertical displacement of the projectile at that time, that is equal to the height of the cliff:
Answer:
Explanation:
For this problem we need the concept about Force in a Magnetic field,
For definition we know that
Where v is the velocity, m the mass and r the radius or distance between the two points.
We know as well that
where q is the charge of a proton
v the velocity and B the magnetic field, then matching the two equation,
Re-arrange for q/m (charge to mass ratio)
Our values are,
Substituting,