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goldfiish [28.3K]
3 years ago
8

If you could please answer the questions A,B,C Not D. Image attached below

Physics
1 answer:
Rina8888 [55]3 years ago
4 0
A. Mass

b. Car's Kinetic Energy

c. Kinetic energy is the energy an object has due to its motion. The kinetic energy of an object is calculated from the velocity and the mass of the object.
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The stem of thermometer is made by thick glass and the bulb is made by thin glass, Why?​
Svet_ta [14]

Answer:

The reason is to allow the thermometer to respond relatively quickly, and relatively accurately. The glass contains the liquid being used in the thermometer, but if it is too thick, then it will not pass heat as quickly, and it will absorb some of the heat from whatever is being measured.

Explanation:

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7 0
2 years ago
7. Calculate the force applied on an object if the Pressure exerted is 90 Pascal over an area of 900 cm2.
Tanya [424]

Answer:

Explanation: pressure = force / area

Rearrange to get: force = pressure x area. 900 cm2 = 0.09 m2

force = 90 x 0.09

= 8.1 N

6 0
3 years ago
The author expresses the central message of the poem when she says the following quote: "I am still a night creature, but I will
luda_lava [24]

Answer:FALSE

Explanation: The Central message of a poem is the Theme of the poem, the poem is a poetry done to pass a particular message which may be regarding the present predicament of the people or to entertain. The poem the Desert Run was written in the year 1988 it was meant to express DISCRIMINATION AND HOPE. The poem was written by Mitsuye Yamada an activist of women rights and a Japanese National who lives in Seattle, Washington.

8 0
3 years ago
If a box of supplies is dropped from the cargo hold of an airplane travelling at an altitude of 4,410 meters how long will it ta
Paraphin [41]

Answer:

It will take 30 seconds to reach the ground, and it will be travelling at 294 m/s when it does so. This means that its average velocity was 147 m/s.

Explanation:

d=v_ot+\dfrac{1}{2}at^2

Since the initial velocity of a dropped object is 0, we can make this the equation:

d=\dfrac{1}{2}at^2 \\\\4410=\dfac{1}{2}(9.8)t^2 \\\\t^2=900

t=30\text{ seconds}

The final velocity can be calculated with the formula:

v_f=v_o+at

Once again, since there is no initial velocity:

v_f=at \\\\v_f=(9.8)(30)=294m/s

Since the initial velocity is 0, the average vertical velocity is 294/2=147 m/s.

Hope this helps!

5 0
3 years ago
Be sure to answer all parts. Without stratospheric ozone (O3), harmful solar radiation would cause gene alterations. Ozone forms
Ratling [72]

Answer:

for C-Cl  bond \lambda_1=3.66\times 10^{-9}\ m

for O-O bond \lambda_2=2.43\times 10^{-9}\ m

Explanation:

  • We have the bond enegy for C-Cl, BE_1=327\ kJ.mol^{-1}= 327000\times 1.66\times 10^{-22}\ J\ per\ molecule
  • bond enegy for C-Cl, BE_2=494\ kJ.mol^{-1}= 494000\times 1.66\times 10^{-22}\ J\ per\ molecule

<u>Now as we know the energy of electromagnetic waves is given by:</u>

E=h.\nu

here E = BE

<u>Then for C-Cl:</u>

327000\times 1.66\times 10^{-22}=6.63\times 10^{-34}\times \nu_1

\nu_1=8.18733\times 10^{16}\ Hz

Now wavelength:

\lambda_1=\frac{c}{\nu_1}

\lambda_1=\frac{3\times 10^8}{8.18733\times 10^{16}}

\lambda_1=3.66\times 10^{-9}\ m

<u>For O2:</u>

494000\times 1.66\times 10^{-22}=6.63\times 10^{-34}\times \nu_2

\nu_2=1.236863\times 10^{17}\ Hz

Now wavelength:

\lambda_2=\frac{c}{\nu_2}

\lambda_2=\frac{3\times 10^8}{1.236863\times 10^{17}}

\lambda_2=2.43\times 10^{-9}\ m

8 0
3 years ago
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