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3 years ago

Pls help me with this one. will give brainliest

Physics

1 answer:

Dmitry [639]3 years ago

3 0

Answer:

Point A and c

Explanation:

you can know the t is the strongest at either pole of the magnet or closer to pole of the magnet as, which you can see A and C was closest

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Find the length of the smallest standing wave that can be formed with light having frequency 600 THz

Reika [66]

Answer:

$L=2.5*10^-^7m$

Explanation:

From the question we are told that

Frequency of light $f= 600 THz$

Generally the equation for wave is mathematically given as

$\lambda=\frac{c}{\gamma}$

Where

$1THz=10^1^2$

$\lambda=\frac{3*10^8}{600*10^1^2}$

$\lambda=0.5*10^-^6m$

Generally the equation for a fundamental Frequency is mathematically given as

$L=\frac{\lambda}{2}$

$L=\frac{0.5*10^-^6}{2}$

Therefore the length of the smallest standing wave

$L=2.5*10^-^7m$

4 0

3 years ago

The ear drum vibrates when struck by sound waves and directly sends a message to the brain that is then recognized as sound

erma4kov [3.2K]

Answer:

true

Explanation:

4 0

3 years ago

A clock is designed that uses a mass on the end of a spring as a timing mechanism. If the oscillation time needed is exactly one

user100 [1]

Answer:

The value is $k = 51.34 \ N/ m$

Explanation:

From the question we are told that

The mass is $m = 1.3 \ kg$

The needed oscillation time is $T = 1 \ s$

Generally the spring constant is mathematically represented as

$k = \frac{4 \pi^2 * m }{ T^2}$

=> $k = \frac{4* 3.142^2 * 1.3 }{ 1^2}$

=> $k = 51.34 \ N/ m$

5 0

3 years ago

An alpha particle (charge +2e) and an electron move in opposite directions from the same point, each with the speed of 2.80×10^5

Evgesh-ka [11]

Answer:

Explanation:

Magnetic field due to moving charge =

$B=\frac{\mu_0}{4\pi} \times \frac{qv}{r^2}$

q is charge moving with velocity v and r is distance from point at which field is calculated .

For alpha particle

$B_1=\frac{\mu_0}{4\pi} \times \frac{2\times 1.6\times10^{-19}\times 2.8\times 10^5}{(8.25\times 10^{-9})^2}$

= 0.1316 x 10⁻³ T

For electron

$B_2=\frac{\mu_0}{4\pi} \times \frac{ 1.6\times10^{-19}\times 2.8\times 10^5}{(8.25\times 10^{-9})^2}$

= .0658 x 10⁻³ T .

Both these magnetic field will be same in direction because direction of equivalent current is same for both the particles .

Hence

Total magnetic field

= B₁ + B₂ = .1974 x 10⁻³

= 1.974 x 10⁻⁴ T .

8 0

3 years ago

A 523.2-W space heater is designed for operation in Germany, where household electrical outlets supply 230 V (rms) service. What

photoshop1234 [79]

Answer:

power = 142.4 W

Explanation:

power of heater in Germany (P₁) = 523.2 W

power of heater in America (P₂) = ?

outlet voltage in Germany (V₁) = 230 V

outlet voltage in America (V₂) = 120 V

While in Germany, power = $\frac{V₁^{2}}{R}$

523.2 = $\frac{230^{2}}{R}$

R = 101.1

While in America, also power = $\frac{V₂^{2}}{R}$

using the value of R gotten above

power = $\frac{120^{2}}{101.1}$

power = 142.4 W

6 0

3 years ago