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astra-53 [7]
4 years ago
12

List two ways in which heterogeneous mixtures differ from elements

Physics
2 answers:
geniusboy [140]4 years ago
7 0
  <span>elements cannot be broken down or resolved into simpler materials. A heterogeneous mixture is a mix of elements, compounds, practically anything, and can be resolved into its components parts by physical methods such as filtration, extraction, sublimation, etc</span>
kodGreya [7K]4 years ago
6 0
Found this online, elements cannot be broken down or resolved into simpler materials. A heterogeneous mixture is a mix of elements, compounds, practically anything, and can be resolved into its components parts by physical methods such as filtration, extraction, sublimation, etc
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Light with a wavelength of 494 nm in vacuo travels from vacuum to water. Find the wavelength of the light inside the water in nm
Mamont248 [21]

Answer:

370.6 nm

Explanation:

wavelength in vacuum = 494 nm

refractive index of water with respect to air = 1.333

Let the wavelength of light in water is λ.

The frequency of the light remains same but the speed and the wavelength is changed as the light passes from one medium to another.

By using the definition of refractive index

n = \frac{wavelength in air}{wavelength in water}

where, n be the refractive index of water with respect to air

By substituting the values, we get

1.333 = \frac{494}{\lambda }

λ = 370.6 nm

Thus, the wavelength of light in water is 370.6 nm.

8 0
3 years ago
2. Isabel throws a tomato at Juan straight down off the balcony of an apartment building at a speed
NISA [10]

Answer:

Speed- 48m/s..........................................

4 0
3 years ago
If the gradient of an Extension versus Force graph was found to be 5.6, then what is the value of the spring constant? *
worty [1.4K]

Answer:

5.6

Explanation:

F=kx is the formula for spring force.  If Extension versus Force was graphed, a linear relation would appear, where the slope is the k value, aka the spring constant.

5 0
3 years ago
A person yells across a canyon and hears an echo 2.5 seconds later. The air temperature is 21°C. How far away is the canyon wall
Alchen [17]

Answer: The canyon wall is 850 m away from the person

Explanation:

Well, the speed of sound V in air at 21 \° C is defined as 343.60 m/s, this can be calculated by the following equation:

V=\sqrt{\frac{\gamma R T}{M}} (1)

Where:

\gamma=1.4 is the Heat capacity ratio for air

R=8.314 J/mol.K is the Universal Gas constant

T=21 \° C+273.15=294.15 K is the temperature in Kelvin

M=0.029 kg/mol is the air molar mass

V=\sqrt{\frac{(1.4)(8.314 J/mol.K)(294.15 K)}{0.029 kg/mol}}

V=343.60 m/s (2)

Now that we know the speed of sound, we can use the following equation to find the distance between the person and the canyon wall:

V=\frac{d}{t} (3)

Where:

d is the distance between the person and the canyon wall

t=2.5 s is the time it takes to the sound wave to travel from the person and then go back

Isolating d:

d=V.t (4)

d=(343.60 m/s)(2.5 s) (5)

Finally:

d=850 m

7 0
3 years ago
A 1400-kg car is moving at a speed of 25m/s. how much kinetic energy does the car have?
Luba_88 [7]

Answer:

437.5Kjoules

Explanation:

K.E=half multiply by mass multiply by square of velocity

=437.5Kjoules

3 0
3 years ago
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