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blondinia [14]
3 years ago
13

Calculate the frequency of visible light having a wavelength of 410 nm

Physics
1 answer:
maria [59]3 years ago
6 0
Given: Wavelength λ = 410 nm  convert to Meters m = 4.10 x 10⁻⁷ m

Speed of light c = 3 x 10⁸ m/s

Required: Frequency  f = ?

Formula: c = λf 

               f = c/λ

               f = 3 x 10⁸ m/s/4.10 x 10⁻⁷ m

               f = 7.32 x 10¹⁴/s  or 732 Thz (Terahertz)
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What resource is used to make fertilizers and other products such as toothpaste and insecticides
kirza4 [7]

Answer:

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6 0
2 years ago
Physics Kinematics question
just olya [345]
An interesting problem, and thanks to the precise heading you put for the question.

We will assume zero air resistance.
We further assume that the angle with vertical is t=53.13 degrees, corresponding to sin(t)=0.8, and therefore cos(t)=0.6.

Given:
angle with vertical, t = 53.13 degrees
sin(t)=0.8; cos(t)=0.6;
air-borne time, T = 20 seconds
initial height, y0 = 800 m

Assume g = -9.81 m/s^2

initial velocity, v m/s (to be determined)

Solution:

(i) Determine initial velocity, v.
initial vertical velocity, vy = vsin(t)=0.8v
Using kinematics equation, 
S(T)=800+(vy)T+(1/2)aT^2 ....(1)  
Where S is height measured from ground.

substitute values in (1):  S(20)=800+(0.8v)T+(-9.81)T^2  =>
v=((1/2)9.81(20^2)-800)/(0.8(20))=72.625 m/s  for T=20 s

(ii) maximum height attained by the bomb
Differentiate (1) with respect to T, and equate to zero to find maximum
dS/dt=(vy)+aT=0 =>
Tmax=-(vy)/a = -0.8*72.625/(-9.81)= 5.9225 s

Maximum height,
Smax
=S(5.9225)
=800+(0.8*122.625)*(5.9225)+(1/2)(-9.81)(5.9225^2)
= 972.0494 m

(iii) Horizontal distance travelled by the bomb while air-borne
Horizontal velocity = vx = vcos(t) = 0.6v = 43.575 m/s
Horizontal distace travelled, Sx = (vx)T = 43.575*20 = 871.5 m

(iv) Velocity of the bomb when it strikes ground
vertical velocity with respect to time
V(T) =vy+aT...................(2)
Substitute values, vy=58.1 m/s, a=-9.81 m/s^2
V(T) = 58.130 + (-9.81)T => 
V(20)=58.130-(9.81)(20) = -138.1 m/s (vertical velocity at strike)

vx = 43.575 m/s (horizontal at strike)
resultant velocity = sqrt(43.575^2+(-138.1)^2) = 144.812 m/s  (magnitude)
in direction theta = atan(43.575,138.1) 
= 17.5 degrees with the vertical, downward and forward. (direction)
4 0
3 years ago
A 3kg object moving at 4 m/s encounters a 20 N resistive force over a duration of 0.20 seconds. The impulse experienced by this
WITCHER [35]

Answer:

the impulse experienced by this object is 4 Ns

Explanation:

Given;

mass of the object, m = 3 kg

velocity of the object, v = 4 m/s

resistive force, F = 20 N

duration of impact, t = 0.2 s

The impulse experienced by this object is calculated as follows;

J = F x t

J = 20 x 0.2

J = 4 Ns

Therefore, the impulse experienced by this object is 4 Ns

3 0
3 years ago
The weight of a 630 g piece of ham is _____.
Pachacha [2.7K]
The weight of an object is given by:
F=mg
where
F is the weight
m is the mass of the object
g=9.81 m/s^2 is the gravitational acceleration

The piece of ham in this problem has a mass of
m=630 g = 0.63 kg
therefore its weight is
F=mg=(0.63 kg)(9.81 m/s^2)=6.18 N
8 0
2 years ago
An inductor with L = 9.55 mH is connected across an ac source that has voltage amplitude 49.0 V You may want to review (Pages 10
Nataliya [291]

The phase angle ф for the source voltage relative to the current  the and  Frequency is 192.14 H.

Phase angle b/w VL and inductor is 90°

Angular frequency, w = 2 pi f

VL = I XL

Frequency, f = VL/2 pi L I = 49/(2 pi x 4.25 x 0.00955) = 192.14 Hz.

The formula = 2/T yields the angular frequency. In radians per second, the angular frequency is expressed. The frequency, f = 1/T. the reciprocal  period. The number of full oscillations per unit of time is given by the motion's frequency, f = 1/T = /2. Angular frequency and velocity are related to displacement and revolution velocity, respectively. full response Angular frequency is a scalar measure of rotation rate, also known as angular speed, radial frequency, circular frequency, and orbital frequency.

Learn more about Phase angle here:

brainly.com/question/29340593

#SPJ4

7 0
1 year ago
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