.**Answer:**

491.4 nm

**Explanation:**

The distance between central and first maxima is,

And the distance between screen abnd grating is,

Now the angle can be find as,

Now the grating distance is,

Now with m=1 condition will become,

So,

**Therefore the wavelength of laser light is 491.4 nm.**

The equation

E=VIT

On the left hand side there is only one variable i.e. E. On the right hand side there are three variables that are all multiplying with each other i.e. VIT. Now to make V subject of the formula use the basic mathematics techniques.

E/IT=V

OR

V=E/IT

This is the final answer where we have made V to be the subject of the formula. Now if we have values for E,I and T we can get the value for V just by inserting the values in the above formula

Answer:

The frictional force the road applies to the rear tire is static friction and it acts opposite to the direction in which the car is traveling.

Explanation:

This question suggests that the car is accelerating forward. Thus, the easiest way for us to know what friction is doing is for us to know what happens when we turn friction off.

Now, if there is no friction and the car is stopped, if we push down on the accelerator, it will make the front wheels to spin in a clockwise manner. This spin occurs on the frictionless surface with the rear wheels doing nothing while the car doesn't move.

Now, if we apply friction to just the front wheels, the car will accelerate forward while the back wheels would be dragging along the road and not be spinning. Thus, friction opposes the motion and as such, it must act im a direction opposite to where the car is going. This must be static friction.

The frictional force the road applies to the rear tire is static friction and it acts opposite to the direction in which the car is traveling.

**Answer:**

conserved

**Explanation:**

During this process the energy is conserved

<span>v(t)=40-16t </span>

<span>so max height is when v(t)=0 or t=40/16 </span>

<span>and the max height is found by plugging that into the height equation</span>