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2 years ago

1. Describe three ways that the transverse waves of the electromagnetic spectrum are used in

1 answer:

8 0

Answer: The x-ray beams are narrowed and shaped with a collimator in the treatment machine head before delivery to the patient.

Explanation:

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How many milligrams are equivalent to 150 dekagrams?

dybincka [34]

i believe the answer is 1.5e+6

hope this helps!

4 0

3 years ago

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Lightning flashes one mile (1609 m) away from you. How much time does it take the light to travel that distance?

hichkok12 [17]

Answer:

$t=5.36\times 10^{-6}\ s$

Explanation:

Given that,

Lightning flashes one mile (1609 m) away from you.

We need to find the time it take the light to travel that distance. Let the time be t. We know that,

speed = distance/time

$t=\dfrac{d}{v}\\\\t=\dfrac{1609}{3\cdot10^{8}}\\\\=5.36\times 10^{-6}\ s$

So, the required time is $5.36\times 10^{-6}\ s$

7 0

2 years ago

A circular coil of radius 5.0 cm and resistance 0.20 Ω is placed in a uniform magnetic field perpendicular to the plane of the c

Romashka [77]

Answer:

Explanation:

Given that,

Assume number of turn is

N= 1

Radius of coil is.

r = 5cm = 0.05m

Then, Area of the surface is given as

A = πr² = π × 0.05²

A = 7.85 × 10^-3 m²

Resistance of

R = 0.20 Ω

The magnetic field is a function of time

B = 0.50exp(-20t) T

Magnitude of induce current at

t = 2s

We need to find the induced emf

This induced voltage, ε can be quantified by:

ε = −NdΦ/dt

Φ = BAcosθ, but θ = 90°, they are perpendicular

So, Φ = BA

ε = −NdΦ/dt = −N d(BA) / dt

A is a constant

ε = −NA dB/dt

Then, B = 0.50exp(-20t)

So, dB/dt = 0.5 × -20 exp(-20t)

dB/dt = -10exp(-20t)

So,

ε = −NA dB/dt

ε = −NA × -10exp(-20t)

ε = 10 × NA exp(-20t)

Now from ohms law, ε = iR

So, I = ε / R

I = 10 × NA exp(-20t) / R

Substituting the values given

I = 10×1× 7.85 ×10^-3×exp(-20×2)/0.2

I = 1.67 × 10^-18 A

6 0

3 years ago

A force of 25 newtons moves a box a distance of 4 meters in 5 seconds.

Simora [160]

By definition, we have that the work done is given by:

$W = F * d$

Where,

F: force in the direction of displacement

d: displaced distance

Substituting values we have:

$W = (25) * (4)\\W = 100 Nm$

Then, the power is given by:

$P = \frac{W}{t}$

Where,

t: time

Substituting values we have:

$P = \frac{100}{5}$

$P = 20\frac{Nm}{s}$

Answer:

The work done on the box is 100 Nm, and the power is 20 Nm/s.

5 0

3 years ago

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The higher the objects " ? ", the more kinetic energy

natita [175]

Answer:

yes

Explanation:

can i get brainlest pls

7 0

3 years ago

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