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3 years ago

Why are all galaxies moving away from us?

1 answer:

7 0

Galaxy million of star and planet. gravitional wave field all the universe some planet explosive itself moving other places . Black holes Mass gravity field

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In order to relieve excessive pump pressure in an engine's internal oil system, most engines are equipped with a

svlad2 [7]

Answer:

A-Oil pressure relief valve.

5 0

2 years ago

Most of the bright stars in our galaxy are located in the galactic

GenaCL600 [577]

False. Most of the bright stars in our galaxy are located in the disk.

3 0

3 years ago

If you run a 500 W computer for 4 hours, your electric meter will read ____; this is a measure of _______ "used"

emmasim [6.3K]

Answer:

If you run a 500 W computer for 4 hours, your electric meter will read 2kWh; this is a measure of energy "used". The correct answer is D.

Explanation: Energy is defined as the capacity of doing work and is occurs in different forms( electrical, kinetic, potential energy). Electrical energy consumption can be calculated or measure through the multiplication of the power( W or kW) used by the number of hours during which the power is consumed. Therefore the unit of energy is kWh. From the question,

500W was used for 4 H

Therefore energy consumed

500× 4= 2000Wh. To convert to kWh

Divide by 1000,

2000÷ 1000= 2.

There energy consumed in kWh is,

2kWh energy.

7 0

3 years ago

Read 2 more answers

On what factors capacitance of parallel plate capacitor depends?

Roman55 [17]

Answer:

Separation between the plates, area of the plates and dielectric constant

Explanation:

The capacitance of a parallel plate capacitor is given by:

$C=k \epsilon_0 \frac{A}{d}$

where

k is the dielectric constant

$\epsilon_0$ is the vacuum permittivity (which has a constant value)

A is the area of the plates

d is the separation between the plates

Therefore from the formula we see that the capacitance of a parallel plate capacitor depends on the following factors:

- Separation between the plates

- Area of the plates

- Dielectric constant

3 0

3 years ago

A wave travels a distance of 60cm in 3s. The distance blw successive crests of thd wave is 4cm. What is the frequency?

schepotkina [342]

Data:
ΔS = 60cm
Δt = 3s
Vm = ?

Vm = ΔS/Δt
$Vm = \frac{60}{3}$
$Vm = 20cm/s$

We have:

Vm = v
ΔS = λ
Δt = T

$v = \frac{\lambda}{T}$
$20 = \frac{\lambda}{4}$
$\lambda = 20*4$
$\lambda = 80cm$

Soon:

$v = \lambda*f$
$20 = 80*f$
$80f = 20$
$f = \frac{20}{80} simplify( \frac{\div20}{\div20} )= \frac{1}{4}$
$\boxed{f = 0,25Hz}$

6 0

3 years ago