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Vika [28.1K]
4 years ago
7

Please help :D

Physics
1 answer:
r-ruslan [8.4K]4 years ago
8 0

Answer:

C. A tennis player serves into the net.

Explanation:

All the other answer choices say something is being held so my guess is C

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Nitroball is similar to volleyball with no more than 3 touches per side?
ankoles [38]

Answer:

True!

Explanation:

7 0
3 years ago
A square plate of copper with 47.0 cm sides has no net charge and is placed ina region of uniform electric field of 75.0 kN/C di
timurjin [86]

Answer:

(a) Charge density σ=6.6375×10²nC/m²

(b) Total charge Q=1.47×10²nC

Explanation:

Given Data

A=47.0 cm =0.47 m

Electric field E=75.0 kN/C

To find

(a) Charge density σ

(b)Total Charge Q

Solution

For (a) charge density σ

From Gauss Law we know that

Φ=Q/ε₀.......eq(i)

Where

Φ is electric flux

Q is charge

ε₀ is permittivity of space

And from the definition of flux

Φ = EA

The flux is  electric field passing  perpendicularly through the surface

Put the this Φ in equation(i)

EA =Q/ε₀

where Q(charge)=σA

EA=(σA)/ε₀

E=σ/ε₀

σ=ε₀E

=(8.85*10^{-12} )*(75.0*10^{3} )\\=6.6375*10^{-7} C/m^{2}\\=6.63*10^{2}nC/m^{2}

σ=6.6375×10²nC/m²

For (b) total charge Q

Q=σA

Q=(6.6375*10^{2} nC/m^{2} )(0.47m)^{2}\\ Q=1.47**10^{2}nC

6 0
3 years ago
If Joey ran 60 meters in 10 seconds, then his velocity is ________ m/s.
BabaBlast [244]

Answer:

6 m/s

Explanation:

6 0
4 years ago
Read 2 more answers
Imagine you are standing on a bathroom scale inside an elevator. What would happen to your weight reading when the elevator acce
Softa [21]

Answer:

it would decrease i think

Explanation:

4 0
3 years ago
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If you have a density of 100 kg/L, and a mass of 1000 units, tell me the following: First what are the mass units?
Troyanec [42]

Answer:

<em> The mas unit is the the 'Kilogram' written as 'kg'</em>

<em>Volume is 10 L</em>

<em></em>

Explanation:

The complete question is

If you have a density of 100 kg/L, and a mass of 1000 units, tell me the following: First, what are the mass units?

Second, what is the volume

mass units is the 'Kilogram', written as 'kg'

density = mass/volume = 100 kg/L

the mass  = 1000 kg

volume = mass/density = 1000/100 =<em> 10 L</em>

7 0
3 years ago
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