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Tomtit [17]
3 years ago
8

Which one of these waves cannot travel in a vacuum

Physics
2 answers:
Karo-lina-s [1.5K]3 years ago
8 0

Sound waves cannot travel in vaccum

lora16 [44]3 years ago
4 0

Answer:

Sound waves

Explanation:

they cannot travel in a vacuum

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Suppose that you make a series RC circuit with a capacitor and a known resistor that has a 5% tolerance: R= 5.20 ± 0.26kΩ. You p
Masja [62]

Answer:

correct answer is C

Explanation:

The time constant of an RC circuit is

           τ = RC

so to find the capacitance

          C = τ/ R

          C = 2.150 / 5.20 10³

          C = 4.13 10⁻⁴ F

to find the error we use the worst case

         ΔC = | |\frac{dC}{d \tau }| \ \Delta  \tau + | \frac{dC}{dR} | \ \Delta R

the absolute value guarantees that we find the worst case, we evaluate the derivatives

          ΔC = 1 /R Δτ + τ/R²  ΔR

the absolute values ​​of the errors are

          Δτ = 0.002 s

          ΔR = 0.3 kΩ

we substitute

           ΔC = 0.002 /5.20 10³ + 2.150/(5.20 10³)²   0.3 10³

           ΔC = 3.8 10⁻⁷ + 1.74 10⁻⁵

           ΔC = 1.77 10⁻⁵ F

the uncertainty or error must be expressed with a significant figure

            ΔC = 2 10⁻⁵ F

the percentage error is

            Er% =\frac{\Delta C}{C} \ 100

            Er% = \frac{2 \ 10^{-5} }{ 4.13 \ 10^{-4} } \ 100

            Er% = 4.8%

the correct answer is C

3 0
3 years ago
A radioisotope is place near a radiation detector, which registers 80 counts per second. Eight hours later, the detector registe
vesna_86 [32]
The isotopes half life is 2 hours

Since given the following :
time    = 8 hours × 3600s/hr = 28800 seconds
A₀ = 80 Bq as the first registration of detector counts per second
A  = 5   Bq as the registration of detector counts per second eight hours later

Using the formula:
∴ A = A₀ e^-λt    
∴ A/A₀ = e^-λt    
∴ ln (A/A₀) = -λt  
∴ λ = -ln (A/A₀) /t  = ln2 / t_{1/2}
∴ t_{1/2} = -ln2 / ln(A/A₀) (t)
∴ t_{1/2} = -ln2 / ln(5/80) (8 hours) = 2 hours
5 0
3 years ago
Someone please help??
stira [4]
The efficancy is .375
5 0
3 years ago
Which change in state requires that energy be added to the substance
KengaRu [80]
I believe it’s Deposition!
5 0
4 years ago
Read 2 more answers
Ts to
Leni [432]

The charge not experience a net magnetic force if it moves to the right.

<h3>What is the magnetic force?</h3>

The magnetic force is a force that is felt by an object owing to the presence of a magnet. We should note that when a charge is placed in a magnetic field, it experiences a magnetic force.

The direction in which the charge will experience no net magnetic force is when the charge moves towards the right.

Learn more about magnetic field:brainly.com/question/3673512

#SPJ1

5 0
2 years ago
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