**Answer:**

The angle is 25.34°.

**Explanation:**

**Given that,**

Wave length = 650 nm

Angle = 68.0°

**We need to calculate the distance**

**For a diffraction grating**

**We need to calculate the angle**

**Using formula for angle**

**Hence, The angle is 25.34°.**

Because it’s a scientific method so it’s a scientific method

**Answer:**

a) Acceleration is zero
, c) Speed is cero

**Explanation:**

a) the equation that governs the simple harmonic motion is

x = A cos (wt +φφ)

Where A is the amplitude of the movement, w is the angular velocity and φ the initial phase determined by the initial condition

Body acceleration is

a = d²x / dt²

Let's look for the derivatives

dx / dt = - A w sin (wt + φ)

a = d²x / dt² = - A w² cos (wt + φ)

In the instant when it is not stretched x = 0

As the spring is released at maximum elongation, φ = 0

0 = A cos wt

Cos wt = 0 wt = π / 2

Acceleration is valid for this angle

a = -A w² cos π/2 = 0

Acceleration is zero

b)

c) When the spring is compressed x = A

Speed is

v = dx / dt

v = - A w sin wt

We look for time

A = A cos wt

cos wt = 1 wt = 0, π

For this time the speedy vouchers

v = -A w sin 0 = 0

Speed is cero

**Answer:**

a)

b)**.**

**Explanation:**

Given that

Boyle's law

P V = Constant ,at constant temperature

a)

Given that

We know that for PV=C

Now by putting the values

PV= 50 x 0.106

Where P is in KPa and V is in

b)

PV= C

Take ln both sides

So

lnP + lnV =lnC ( C is constant)

By differentiating

So

When P= 50 KPa

It indicates the slope of PV=C curve.

It unit is .

Or we can say that **.**