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Ganezh [65]
3 years ago
8

Light of wavelength 619 nm passes through a double slit, and makes its first maximum (m=1) at an angle of 0.226 deg. what is the

separation of the slits, d, IN MILLIMETERS?
(remember milli means 10^-3.)
(unit=mm)

Physics
1 answer:
scoray [572]3 years ago
6 0
0.157mm, working out shown on photo

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Which of the following objects have gravitational potential energy?
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A school bus moves at speed of 35 mi/hr for 20 miles. How long will it take the bus to get to school
ludmilkaskok [199]

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6 0
3 years ago
An electric furnace is to melt 40 kg of aluminium/hour. The initial temperature of aluminium is 32°C. Given that aluminium has s
gizmo_the_mogwai [7]

Answer:

Part a)

P = 13.93 kW

Part b)

R = 8357.6 Cents

Explanation:

Part A)

heat required to melt the aluminium is given by

Q = ms\Delta T + mL

here we have

Q = 40(950)(680 - 32) + 40(450 \times 10^3)

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Q = 42624 kJ

Since this is the amount of aluminium per hour

so power required to melt is given by

P = \frac{Q}{t}

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Part B)

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now the total cost of energy consumption is given as

R = P \times 20 \frac{Cents}{kWh}

R = 417.9 kWh\times  20 \frac{cents}{kWh}

R = 8357.6 Cents

3 0
3 years ago
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