The magnitude is 53N and the direction is 3 degrees. I hope this helps!
Answer:
The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.
Answer:
a. 4662.7W/m^2
b. the damage threshold is 100W/m^2 , therefore the laser is not safe to view if the intensity is 4662.7W/m^2
c. Bmax=6.24*10^-6T
d average intensity=0.01W/cm^2
Explanation:
A He-Ne laser produces light of 633 nm wavelength, 1.5 mW power, with a cylindrical beam of 0.64 mm in diameter.
(a) What is the intensity of this laser beam?
(b) The damage threshold of the retina is 100 W/m2 . Is this laser safe to view head-on?
(c) What are the maximum values of the electric and magnetic fields?
(d) What is the average energy density in the laser beam?
firstly, we get the relation between power and intensity to be
P=IA
1.5*10^-3=I*
I=4662.74W/m^2
b. the damage threshold is 100W/m^2 , therefore the laser is not safe to view if the intensity is 4662.7W/m^2
c.e=
e=(3512391.71)^0.5
e=1874.13W/m^2
maximum values of electric and magnetic fields
Bmax=e/c
c=speed of light 3*10^8 m/s^2
Bmax=1874/3*10^8
Bmax=6.24*10^-6T
d.intensity=average intensity(1/10^2)^2
intensity=0.01W/cm^2
1. Answer;
Velocity decreases as it rises
Explanation;
When you project an object upward and release it at its initial velocity, it is moving in the opposite direction of the force of gravity. Thus the initial velocity is negative. The velocity of the object is also negative on the way up but positive on the way down.
2. Answer;
Velocity is 0 m/s at its highest point
Explanation;
The maximum height of the projectile is when the projectile reaches zero vertical velocity. From this point the vertical component of the velocity vector will point downwards.
The object slows down as it moves upward until it reaches a maximum height, at which time the velocity is zero. Then the velocity increases as the object falls toward the ground.
3. Answer;
-Acceleration is constant -9.8m/s^2
Explanation;
-An object that is thrown vertically upwards decelerates under the earth's gravity. Its speed decreases until it attains a maximum height, where the velocity is zero. Then it is accelerated uniformly downwards under gravity.
4. Answer;
-Acceleration is constant -9.8m/s^2
Explanation;
When a ball is thrown upwards the acceleration due to gravity remains constant throughout. It comes to rest for a moment at the highest point of motion just before returning back to earth.
-The acceleration due to gravity is constant on the object though out its flight. So the acceleration of the projectile is equal to the acceleration due to gravity, 9.81 meters/second/second, from just after its thrown, through its highest point, and until just before it hits the ground.
