Explanation:
Convergent boundaries (where plates collide) and divergent boundaries (where plates split apart).
Answer:
Electron
Explanation:
See attached figure (it was missing in the question).
An atom consists of three types of particle:
- Proton: it is positively charged (charge 
) and it is located in the nucleus. Its mass is approximately 
- Neutron: it has no electric charge, and it is also located in the nucleus. Its mass is just slighly larger than that of the proton (but it is also approximated to )
- Electron: it is negatively charged (charge 
) and it orbits around the nucleus. Its mass is much smaller than that of the proton (
)
From the figure, we see that the only particle orbiting around the nucleus is particle A: therefore, A must be an electron.
Answer:
The frog takes 8 jumps to reach top of well
Explanation:
Given data
Frog at bottom=17 foot
Each time frog leaps 3 feet
Frog has not reached the top of the well, then the frog slides back 1 foot
To Find
Total number of leaps the frog needed to escape from well
Solution
in 1 jump distance jumped=3+(-1)
=2 feet
=2×1 feet
The "-1" is because the frog goes back
Now After 2 jumps the distance jumped as:
Distance Jumped=2+2
Distance Jumped=2*2
=4 feet
Similarly after 7 jumps
Distance Jumped=2+2+......+2
Distance Jumped=2*7
=14 feet
Now after 8th jump the frog climbs but doesnot slide back as it is reached to the top of well.
So
Distance Jumped=(Distance Jumped after 7 jumps)+3
=14+3
=17 feet
The frog takes 8 jumps to reach top of well
Answer:
a) impulse = 2.5 × 10³Ns
b) average force on the passenger during the collision = 8.3 × 10⁵ N
Explanation:
Given that
Elevator cab free fall = 39.0m
The passenger = 92kg
Collision time = 3.00ms
The impulse is given by
J = Δp
where m is the mass ,
v(f) is final velocity
v(i) is initial velocity which is equal to 0
from the conservation energy system, the kinectic enegy of the passenger equal the potential energy of the pasenger
J = 2.5 × 10³Ns
b) Average force is given by
F(avg) = J / Δt
average force on the passenger during the collision = 8.3 × 10⁵ N
Answer:
Doppler effect.
Explanation:
The velocity of the moving car affects the wavelengths of the reflecting radio waves according to the principle of Doppler effect. Therefore, for a car moving away from the radar gun, the wavelength of the radio waves is increased, and for a car moving towards the gun, the wavelength is decreased. The degree of increase or decreases depends on the speed of the car, so if you know how much a wavelength has changed, you know the velocity of the car.
