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Kaylis [27]
3 years ago
12

A

Physics
1 answer:
Lynna [10]3 years ago
3 0

you can swing your leg so it can't be kick, and remove up doesn't make sense and dodging it won't get you anywhere, so scooping it

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A 1 kg object sits on the earth’s surface. What is the force of gravity between the object and the earth? (mass of the earth = 5
snow_lady [41]

Answer:

9.81N

Explanation:

the force of attraction is given by

F=<u>GmM</u><u>/</u><u>R²</u><u> </u>

where m is mass of the body

M is mass of the earth

R is radius of the earth

G is the universal gravitational constant(6.67x10-¹¹)

hence we substitute the values in the formula.

<em> </em><em>you</em><em> </em><em>can</em><em> </em><em>ask</em><em> </em><em>questions</em>

4 0
3 years ago
Science in the study of the natural world through. And.
Lyrx [107]
You need to finish the question
6 0
3 years ago
If the formation of a neutron star leads to a supernova explosion, explain why only three of the hundreds of known pulsars are f
Mandarinka [93]

Explanation:

neutron stars have diameters of about 20km and they are denser than the earth. A rotating neutron star pulsating electromagnetic beam is a named a pulsars but not all neutron stars are pulsars.

Only three of hundreds of known pulsar are found in supernova remnants because as neutron stars gets older, they lose energy and starts to decrease their rotational speeds and the neutron star could not radiate particles and energy for long as a pulsar does. there are less existing pulsars compared to supernova explosion rate because the life time of pulsars is obout 10×10^6 years after the neutron can no longer spin at high speeds to produce beams of particles and energy, almost all the pulsars are older  and spin slow to produce light of visible wavelength or X-ray wavelengths and we only get a pulse of radiation from a neutron star as a pulsar as the beam sweeps over earth.

8 0
4 years ago
Poorly treated municipal wastewater is discharged to a stream. The river flow rate upstream of the discharge point is Qu/s = 8.7
Musya8 [376]

Answer

given,

Q u  = 8.7 m³/s

Q d= 0.9 m³/s

BOD concentration = 50 mg/L

a) BOD concentration at the down stream

C_{down}=\dfrac{0.9\times 50}{8.7+0.9}

C_{down}=\dfrac{0.9\times 50}{9.6}

               = 4.69 mg/L

b) discharge = 9.6 m³/s

cross sectional area = 10 m²

velocity steam = \dfrac{8.7+0.9}{10}

                        = 0.96 m/s

time taken to move 50 km down stream =\dfrac{50 \times 1000}{0.96}

                                                                  = 52083.3 s

                                                                  = \dfrac{52083.3}{3600\times 24}

                                                                   = 0.6 days

now,

C_t=C_0e^{-kt}

C_t=4.6875\ e^{-0.2\times 0.6}

C_t = 4.16 mg/L

5 0
4 years ago
How much work is done by a babysitter who uses 8000 W of power to lift a baby in 2s?
Solnce55 [7]

Answer:

16000 Joules

Explanation:

8000W x 2

5 0
3 years ago
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