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3 years ago

Lowest frequency of wave

Physics

2 answers:

Harlamova29_29 [7]3 years ago

4 0

The answer would be a radio wave

Nutka1998 [239]3 years ago

3 0

The lowest frequency portion of the electromagnetic spectrum is designated as “radio,” generally considered to have wavelengths within 1 millimeter to 100 kilometers or frequencies within 300 GHz to 3 kHz.

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Reacting with water in an acidic solution at a particular temperature, compound A decomposes into compounds B and C according t

Diano4ka-milaya [45]

Answer:

after t = 3 hours compound A remain 0.396 M

t = 12.98 hours

Explanation:

P = P_0*e^(-kt)

t = 30 minutes = 30/60 hours = 0.5 hours

and P_0 = 0.60M

and P after t = 0.5 hours is 0.56 M

(0.56/0.6) = e^(-kt)

0.933 =e^(-kt)

k = 0.138

P = P_0*e^(-0.138t)

Now after t = 3 hours,

P = 0.6* e^((-0.138)*3) = 0.396 M

time when P = 0.1 M

0.1 = 0.6*e^(-0.138t)

t = 12.98 hours

8 0

3 years ago

An incident light ray hits a plane surface at 20 degrees (hint: remember where the angle is measured from). What is the angle be

Juli2301 [7.4K]

Answer:

$40^{\circ}$

Explanation:

The incident angle is $20^{\circ}$ so the reflected ray will also be $20^{\circ}$ .

The normal divides the angle between the incident and reflected ray. So, the angle between them would be

$\text{Incident angle}+\text{Reflected angle}=20+20=40^{\circ}$

So, the angle between the incident and reflected rays is $40^{\circ}$ .

8 0

3 years ago

on takeoff, the propellers on a uav (unmanned aerial vehicle) increase their angular velocity from rest at a rate of ω = (25.0t)

Rudik [331]

Hi there!

a)
We can find the angular velocity at t = 2.0 s by plugging in this value into the equation.

$\omega (t) = 25.0t \\\\\omega (2) = 25.0(2) = \boxed{50.0 \frac{rad}{s}}$

The angular acceleration is the derivative of the angular velocity, so:
$\alpha (t) = \frac{d\omega}{dt} (25.0t) = 25.0$

Thus, the angular acceleration is a <u>constant 25 rad/s².</u>

7 0

2 years ago

Alona [7]

In the circuit, the total current is 60 A and the voltage is 240 V. If R1

resistance is 20 Ω, then the R2 resistance would be 5 Ω

<h3>What is resistance?</h3>

Resistance is the obstruction of electrons in an electrically conducting material. The SI unit of the resistance is Ohm

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.

V=IR

where V is the voltage

I is the current

R is the resistance

For the given problem V= 240 V and I = 60 A

R = V/I

R =240/60

R =4 Ω

For calculating equivalent resistance in parallel combination.

1/Re = 1/R1 + 1/R2

1/4 = 1/20 + 1/R2

R2 = 5 Ω

Thus , the R2 resistance would be 5 Ω, therefore the correct answer is option B.

Learn more about resistance here

brainly.com/question/14547003

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7 0

2 years ago

1 (a) A large stone, initially at rest, falls from the top of a building. The stone takes 3.2s to fall to the ground. For this s

Marina CMI [18]

The formula that can be used to show that the speed of the stone when it hits the ground is 32 m/s is v = u + at

According to equations of motion,

v = u + at

v = Final velocity

u = Initial velocity

t = Time

a = Acceleration due to gravity

t = 3.2 s

a = 10 m / s²

v = 0 + ( 10 * 3.2 )

v = 32 m /s

Equations of motion are used to describe the position of a moving object in a constantly accelerated manner. The position can be described using acceleration, velocity, displacement and time.

Therefore, the formula that can be used to show that the speed of the stone when it hits the ground is 32 m/s is v = u + at

To know more about equations of motion

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7 0

1 year ago