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nekit [7.7K]
3 years ago
9

Rasheed runs a football 10 meters east, turns and runs the football 6 meters west. If his velocity during this run is found to b

e 3 meters/second, how long does this take Rasheed to complete this run?
Physics
2 answers:
34kurt3 years ago
6 0
It was take about 48 seconds I think
muminat3 years ago
5 0

I believe that would be 48 seconds.

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An object on earth with a mass of 7.5 kg has a weight of
kumpel [21]

Answer:

75kgms/2

Explanation:

weight=mass*g=7.5kg*10ms/1=75

6 0
3 years ago
Which substance is used to remove rust from metal?
Vlad [161]

Answer : The correct option is, (B) Hydrochloric acid(HCl)

Explanation :

Rust is an iron oxide, which is formed by the reaction of iron with oxygen in the presence of water.

As we know that the rust is an iron oxide (base) which is removed by an acid.

As per given options, the acid used to remove the rust from the metal is hydrochloric acid and not sulfuric acid because sulfuric acid is an oxidizing agent which oxidizes the metal more.

While the other options, ammonia and sodium hydroxide are a base.

Hence, hydrochloric acid is used to remove rust from metal.

7 0
3 years ago
Read 2 more answers
A square coil of wire with side 8.0 cm and 50 turns sits in a uniform magnetic field that is perpendicular to the plane of the c
bezimeni [28]

Answer:

Explanation:

area of the coil  A = .08 x .08 = 64 x 10⁻⁴ m ²

flux through the coil Φ = area of coil x no of turns x magnetic field

= 64 x 10⁻⁴ x 50 x B where B is magnetic field

emf induced = dΦ / dt = ( 64 x 10⁻⁴ x 50 x B - 0 ) / .2

= 1.6 B

current induced = emf induced / resistance

12 x 10⁻³ = 1.6 B / 15

B = 112.5 x 10⁻³ T .

8 0
3 years ago
Two thermally insulated cylinders, A and B, of equal volume, both equipped with pistons, are connected by a valve. Initially A h
SVEN [57.7K]

Answer:

a

The final temperature is T_1 =(0.5)^{\frac{2}{3} }

b

The initial and the final temperature are the same

Explanation:

The explanation is shown in the first and second uploaded image

5 0
3 years ago
a blackbody is radiating with a characteristic wavelength of 9 microns what is the blackbody temperature answer in kelvin
Daniel [21]

This question involves the concepts of Wein's displacement law and characteristic wavelength.

The blackbody temperature will be "3.22 x 10⁵ k".

<h3>WEIN'S DISPLACEMENT LAW</h3>

According to Wein's displacement law,

\lambda_{max} T = c\\\\T=\frac{c}{\lambda_{max}}

where,

  • \lambda_{max} = characteristic wavelength = 9 μm = 9 x 10⁻⁹ m
  • T = temperature = ?
  • c = Wein's displacment constant = 2.897 x 10⁻³ m.k

Therefore,

T=\frac{2.897\ x\ 10^{-3}\ m.k}{9\ x\ 10^{-9}\ m}

T = 3.22 x 10⁵ k

Learn more about characteristic wavelength here:

brainly.com/question/14650107

7 0
3 years ago
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