A 500 nm (red) light beam strikes normally on a 1 cm thick piece of glass having refractive index 1.60. How many wavelengths occur inside the glass before the beam emerges?

There is a counterclockwise induced current in the conducting loop shown in the figure. Select the statement(s) below which may be true about the external magnetic field inside the loop causing this induced current.

An object is attached to a vertical ideal massless spring and bobs up and down between the two extreme points A and B. When the kinetic energy of the object is a minimum, the object is located

Simplify. Assume that all variables represent positive real numbers.4 + 4

Multiply, then simplify the product. Assume that all variables represent positive real numbers.(4 + )(4 – )

Find the product.(7a – 12)2

Factor by grouping.x3 + 8×2 – 5x – 40

Find the product.3x(4x – 1)(4x + 6)

1.1.4 Daar moet ‘n wettige kontrak wees tussen die bouer en die eienaar. Identifiseer EEN kontraktuele verantwoordelikheid wat NIE by die inligting pas nie. (1)

Use the given data to find the equation of the regression line. Round the final values to three significant digits, if necessary.x68202836​y24132030​