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astra-53 [7]
3 years ago
12

Chemical testing of water

Physics
1 answer:
NNADVOKAT [17]3 years ago
4 0
Tap water isn't pure. it just isn't H₂O.
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What is the velocity in meters per second of a runner who runs exactly 110 m toward the beach in 72 seconds.
KATRIN_1 [288]

1.53 m/s toward the beach

Explanation:

The magnitude of the velocity of the runner is given by:

v=\frac{d}{t}

where

d is the displacement of the runner

t is the time taken

In this case, d=110 m and t=72 s, so the velocity of the runner is

v=\frac{110 m}{72 s}=1.53 m/s

Velocity is a vector, so it consists of both magnitude and direction: we already calculate the magnitude, while the direction is given by the problem, toward the beach.

3 0
3 years ago
Read 2 more answers
Which is an example of a compound machine?
nydimaria [60]

Answer:

A bicycle.

Explanation:

A compound machine is a machine consisting of multiple simple machines.

A bicycle contains 3 simple machines. A lever, pulley, and wheel-and-axle.

all other choices are simple machines.

Hope this helps!

-MoCKEry

7 0
3 years ago
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Two oppositely charged but otherwise identical conducting plates of area 2.50 square centimeters are separated by a dielectric 1
TEA [102]

Answer: 38.2 μC

Explanation: In order to solve this problem we have to use the relationship for a two plate capacitor with a dielectric  so:

C= Q/V= we also know that for two paralel plates C=εo*k*A/d and V=E/d

where k is the dielectric constant, A plate area, V is potential difference; E electric field and d the separation between the plates.

reorganizing we have:

Q/A=σ= E*k/εo= 1.2 * 10^6*3.6/8.85 * 10^-12=38.2μC

3 0
3 years ago
The wavelength of violet light is about 425 nm (1 nanometer = 1 × 10−9 m). what are the frequency and period of the light waves?
dexar [7]

1) Frequency: 7.06\cdot 10^{14} Hz

The frequency of electromagnetic radiation is given by:

f=\frac{c}{\lambda}

where

c = 3 \cdot 10^8 m/s is the speed of light

\lambda is the wavelength

In this case, the wavelength of the radiation is

\lambda=425 nm=425\cdot 10^{-9} m

Therefore the frequency is

f=\frac{3\cdot 10^8 m/s}{425 \cdot 10^{-9} m}=7.06\cdot 10^{14} Hz


2) Period: 1.42\cdot 10^{-15} s

The period is equal to the reciprocal of the frequency of the wave:

T=\frac{1}{f}

Using the frequency we found previously, f=7.06\cdot 10^{14} Hz, we find:

T=\frac{1}{7.06\cdot 10^{14} Hz}=1.42\cdot 10^{-15} s


5 0
3 years ago
The main reason Dorothy might use a success strategy is to ____
Licemer1 [7]
The Main reason Dorothy might use a succes strategy is so that she can succed
7 0
3 years ago
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