All categories

3 years ago

The wavelength of light is 5000 angstrom. Express it in nm and m.

Physics

1 answer:

Ierofanga [76]3 years ago

7 0

Answer:

1 angstrom = 0.1nm

5000 angstrom = 5000/1 × 0.1nm

$1 \: angstrom = 1 \times {10}^{ - 10} m$

5000 angstrom = 5000 × 1 × 10^-10

Hope this helps you

You might be interested in

A soccer ball of mass 0.4 kg is moving horizontally with a speed of 20 m/s when it is kicked by a player. The kicking force is s

amid [387]

Answer:

v_{f} = 74 m/s, F = 230 N

Explanation:

We can work on this exercise using the relationship between momentum and moment

I = ∫ F dt = Δp

bold indicates vectors

we can write this equations in its components

X axis

Fₓ t = m ( -v_{xo})

Y axis

t = m (v_{yf} - v_{yo})

in this case with the ball it travels horizontally v_{yo} = 0

Let's use trigonometry to write the final velocities and the force

sin 30 = v_{yf} / vf

cos 30 = v_{xf} / vf

v_{yf} = vf sin 30

v_{xf} = vf cos 30

sin40 = F_{y} / F

F_{y} = F sin 40

cos 40 = Fₓ / F

Fₓ = F cos 40

let's substitute

F cos 40 t = m ( cos 30 - vₓ₀)

F sin 40 t = m (v_{f} sin 30-0)

we have two equations and two unknowns, so the system can be solved

F cos 40 0.1 = 0.4 (v_{f} cos 30 - 20)

F sin 40 0.1 = 0.4 v_{f} sin 30

we clear fen the second equation and subtitles in the first

F = 4 sin30 /sin40 v_{f}

F = 3.111 v_{f}

(3,111 v_{f}) cos 40 = 4 v_{f} cos 30 - 80

v_{f} (3,111 cos 40 -4 cos30) = - 80

v_{f} (- 1.0812) = - 80

v_{f} = 73.99

v_{f} = 74 m/s

now we can calculate the force

F = 3.111 73.99

F = 230 N

6 0

3 years ago

Which list places the layers of the sun in the correct order from outermost to innermost?

Valentin [98]

Answer - corona, chromosphere, photosphere

4 0

3 years ago

पत्र- अपने क्षेत्र की सड़कों की बुरी दशा की जानकारी देते हुए और उन्हें ठीक कराने की प्रार्थना करते हुए नगर निगम अधिकारी को पत्र

Ksivusya [100]

Answer:

पत्र- अपने क्षेत्र की सड़कों की बुरी दशा की जानकारी देते हुए और उन्हें ठीक कराने की प्रार्थना करते हुए नगर निगम अधिकारी को पत्र लिखिए |

5 0

2 years ago

a desktop computer and monitor together draw about 2 A of current they plug into a wall outlet that is 120 V what is the Resista

Delvig [45]

Answer:

$60 \Omega$

Explanation:

the relation between current, voltage and resistance in an electrical circuit is given by Ohm's law:

$V=IR$

where V is the voltage, I is the current and R is the resistance. In this problem, the current is I=2 A, the voltage is V=120 V, therefore we can arrange the previous equation and find the resistance:

$R=\frac{V}{I}=\frac{120 V}{2 A}=60 \Omega$

7 0

2 years ago

The loop is in a magnetic field 0.20 T whose direction is perpendicular to the plane of the loop. At t = 0, the loop has area A

love history [14]

Answer:

Part a)

$EMF = 14 \times 10^{-3} V$

Part b)

$EMF = 15.67 \times 10^{-3} V$

Explanation:

As we know that magnetic flux through the loop is given as

$\phi = B.A$

now we have

$\phi = B\pi r^2$

now rate of change in flux is given as

$\frac{d\phi}{dt} = B(2\pi r)\frac{dr}{dt}$

now we know that

$A = \pi r^2$

$0.285 = \pi r^2$

$r = 0.30 m$

Now plug in all data

$EMF = (0.20)\times 2\pi\times (0.30) \times (0.037)$

$EMF = 14 \times 10^{-3} V$

Part b)

Now the radius of the loop after t = 1 s

$r_1 = r_0 + \frac{dr}{dt}$

$r_1 = 0.30 + 0.037$

$r_1 = 0.337 m$

Now plug in data in above equation

$EMF = (0.20)\times 2\pi\times (0.337) \times (0.037)$

$EMF = 15.67 \times 10^{-3} V$

5 0

3 years ago