Answer:
The intensity of a light from the source at a distance of 10 meters is 0.0026 foot-candle.
Explanation:
Given that,
Distance from the source = 2 meter
Intensity = 0.065 foot -candle
New distance = 10 m
We know that,
The intensity I of light varies inversely with the square of the distance from the source.
We need to calculate the value of constant
Using formula of intensity
Put the value into the formula
We need to calculate the intensity
Using formula of intensity again
Put the value into the formula
Hence, The intensity of a light from the source at a distance of 10 meters is 0.0026 foot-candle.
Oceanic crust is much denser than continental crust. This is why at convergent boundaries where oceanic and continental plates meet, the oceanic plate subducts into the upper mantle. This is also why continental plates tend to rise above oceanic plates. The reasons for this include different organic composition as well as pressure (due to gravity pulling upon the air and water).
Answer:
- Momentum is conserved
- Some kinetic energy is converted into thermal energy
Explanation:
Collision occurs when an object exert force on another. Collision can either be elastic or inelastic depending on whether the bodies stick together or separates after collision.
For elastic collision, the bodies separates after collision and due to this both their momentum and energy are conserved. Both separated object doesn't loose energy as such during collision and they possesses greater momentum.
In inelastic collision, the bodies stick together after collision. Their momentum is conserved but not their kinetic energy since they are not free to move independently.
Based on the question, the type of collision that occur is an inelastic collision since they stick together in air after collision. Some of the kinetic energy of the particles are turned into vibrational energy of the atoms leading to heating effect. Based on this, the following are true
- Their momentum before and after collision is conserved
- Some kinetic energy is converted into thermal energy(heat)
Answer:
The distance travelled is 151.22m and it took 0.97s
Explanation:
Well, this is an ARM problem, so we will need the following formulas
where is the initial position (we can assume is zero), is the initial speed of 104 m/s, is the initial time (we also assume is zero), a is the acceleration of 107 m/s2, v is speed, x is position and t is time.
Now that we have the formulas, we know that when the electron stops it has no speed. Then we calculate how much time it takes to stop.
Finally, we calculate the distance travelled in this time