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Marat540 [252]
3 years ago
10

How much force must be applied to move a 3.0 kg toy train that would accelerate to 7.0 m/sec2?

Physics
2 answers:
stiv31 [10]3 years ago
5 0

Answer: 21 N

Explanation:

Force=mass x Accceleration

So 21=3x7

andreyandreev [35.5K]3 years ago
3 0

Answer:

21

Explanation:

Its 21 because force times acceleration or 21 x 3

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Y_Kistochka [10]

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Explanation:

Need help asap

3 0
3 years ago
Light shines through a single slit whose width is 5.6 × 10-4 m. A diffraction pattern is formed on a flat screen located 4.0 m a
Mrac [35]

Answer:

462 nm

Explanation:

Given: width of the slit, d = 5.6 × 10⁻⁴ m

Distance of the screen, D = 4.0 m

Fringe width, β = 3.3 mm = 3.3 × 10⁻³ m

First dark fringe means n =1

Wavelength of the light, λ = ?

\beta = \frac{\lambda D}{d}\\ \Rightarrow \lambda = \frac{d \beta}{D} =\frac{5.6\times 10^{-4} \times 3.3 \times 10^{-3}}{4.0} = 4.62 \times 10^{-7}m = 462 nm

5 0
3 years ago
The dark bands on the wall are from ______________ interference. and i will give brainlyest
Fittoniya [83]
Light can be seen as an electromagnetic wave.
What happens when two waves, with the same frequency, superpose is called interference.

If at a certain point two waves arrive both with a crest, we have constructive interference and the amplitudes sum up, reaching the maximum value, resulting in bright spots.

If at a certain point one of the waves arrives with a crest and the other wave arrives with a trough, we have destructive interference, and the two amplitudes cancel out, resulting in dark spots.

Therefore, t<span>he dark bands on the wall are from destructive interference.</span>
4 0
4 years ago
Why am i getting so many spam calls on my cell phone.
OleMash [197]

Answer:

Why do I keep getting spam calls? Experts credit the ascendance of spam phone calls to fundamental problems with caller ID, a phone system where anyone can operate as a carrier, the inability to detect bad callers, and a number of bad actors exploiting those flaws to drive billions of calls to American phones.

Explanation:

5 0
2 years ago
What is the frequency of a wave traveling at 300,000,000 m/s with a wavelength of .0025 m/cycle? Please help me !!
Lelu [443]

Answer:

its 00.0035474

Explanation:

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8 0
3 years ago
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