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Nina [5.8K]
3 years ago
10

How to find wavelength

Physics
1 answer:
Andrews [41]3 years ago
4 0
If the wavelength<span> is given, the energy can be determined by first using the wave equation (c = λ × ν) to </span>find<span> the frequency, then using Planck's equation to </span>calculate<span> energy. Use the equations above to answer the following questions. 1. Ultraviolet radiation has a frequency of 6.8 × 1015 1/s.</span>
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Please help me with this​
AfilCa [17]

Answer:

20 N exerts no torque about the pivot.

14 N exerts a counterclockwise torque of 14 * .3 = .42 N-m

6  exerts a clockwise torque of 6 * .7 = .42 N-m

The meter stick will not turn because there is no net torque on the meter stick.

3 0
2 years ago
A normal human heart, beating about once per second, creates a maximum 4.00 mV 4.00 mV potential across 0.250 m 0.250 m of a per
ElenaW [278]

Answer:

1) maximum electric field strength = 0.016 V/m

2)maximum magnetic field strength = 5.33 x 10^(-11) T

3) wavelength = 3 x 10^(8)m

Explanation:

A) We are given;

Frequency (f) = 1 Hz

Maximum Potential ΔV = 4 mV = 4 x 10^(-3) V

Length; d = 0.25 m

Now, maximum potential formula is given as;

ΔV = E_o•d

Where E_o is maximum electric field strength.

Thus,

E_o= ΔV/d = (4 x 10^(-3))/0.25 = 0.016 V/m

B) The maximum magnetic field strength is given by;

B_o = E_o/c

Where;

c is speed of light = 3 x 10^(8)

B_o is maximum magnetic field strength

Thus,

B_o = 0.016/(3 x 10^(8)) = 5.33 x 10^(-11) T

C) Speed of any electromagnetic wave is given by;

c = fλ

Where;

f is frequency

λ is wavelength

c is speed of light = 3 x 10^(8)

Thus, making λ the subject,

λ = c/f

λ = (3 x 10^(8))/1 = 3 x 10^(8)m

8 0
4 years ago
A) What is the meaning of specific heat capacity ?​
dem82 [27]

Explanation:

the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).

3 0
3 years ago
A 600 g model rocket is on a cart that is rolling to the right at a speed of 2.5 m/s. The rocket engine, when it is fired, exert
Sergio039 [100]

Answer: 8.43 m

Explanation:

Given

Mass of the rocket, m = 600 g = 0.6 kg

Speed of riling, v = 2.5 m/s

F = mg, where

F = weight of the rocket in N

m = mass of the rocket in kg

g = acceleration due to gravity in m/s²

F = 0.6 * 9.8

F = 5.88 N

Since the the vertical thrust on the rocket is 8 N and 5.88 N of it will be used to counter the rockets weight. Thus, the remaining 2.12 N is what is available to provide acceleration.

Upward acceleration of the rocket is..... F = ma, a = F / m

a = 2.12 / 0.6

a = 3.53 m/s²

using equation of motion, we will calculate how long it will take to rise 20 m in the air

S = ut + 1/2at², where u = 0

20 = 1/2 * 3.53 * t²

t² = 4. / 3.53

t² = 11.33

t = √11.33 = 3.37 s

The distance then is

v = Δx / t, such that

Δx = v * t

Δx = 2.5 * 3.37

Δx = 8.43 m

4 0
3 years ago
Read 2 more answers
is texas near a subduction zone? Justify your answer using the terms plate boundary and plate tectonics
cluponka [151]

Answer:

Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. Regions where this process occurs are known as subduction zones. Rates of subduction are typically measured in centimeters per year, with the average rate of convergence being approximately two to eight centimeters per year along most plate boundaries. so i  believe so

Explanation:

nmw

5 0
4 years ago
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