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3 years ago

What are shadows? A: Human dopplegangers B: Absence of light

Physics

2 answers:

nata0808 [166]3 years ago

8 0

B is the correct answer.

Gnoma [55]3 years ago

3 0

Shadows are B. Absence of light. Hope that helps.

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the atomic number of cesium (Cs) is 55. If an atom of cesium has 78 neutrons, what is the atomic mass of cesium?

Slav-nsk [51]

Atomic mass= number of protons + number of neutrons
$55 + 78 = 133$
hope this helps

7 0

3 years ago

Read 2 more answers

In what direction does the induced current flow in the loop?

bogdanovich [222]

Answer:

Clockwise and counter clockwises, depands.

Explanation:

The direction of current in a loop of wire in a magnatic field depands on the direction in which the loop is moved and the applied magnatic field.

this is determined by what is called right hand rule.

I will give one scenario, let's say that the loop is moved upwards and the applied magnatic field is into the page (if you drew the loop in 2D on a piece of paper), in this case the direction would be clockwise.

6 0

3 years ago

A severe thunderstorm dumped 2.4 in of rain in 30 min on a town of area 29 km2. What mass of water fell on the town? One cubic m

Alexus [3.1K]

Answer:

The mass of water is $1.7661\times10^{9}\ kg$

Explanation:

Given that,

Area of town = 29 km²

Time = 30 min

Height = 2.4 inch

Mass = 103 kg

We know that,

1 m = 39.37 inch

So, $2.4\ inch =\dfrac{2.4}{39.37}$

$2.4\ inch=0.0609\ m$

We need to calculate the volume

Using formula of volume

$V=H\times A$

Put the value into the formula

$V=0.0609\times29\times1000^2$

$V=1766100\ m^3$

We need to calculate the mass of water

Using formula of density

$\rho=\dfrac{m}{V}$

Put the value into the formula

$1000=\dfrac{m}{1766100}$

$m=1000\times1766100$

$m=1.7661\times10^{9}\ kg$

Hence, The mass of water is $1.7661\times10^{9}\ kg$

3 0

3 years ago

A ceiling fan rotates at the rate of 45 degree every 0.75sec. what is the angular speed of the fan in rad/sec

babymother [125]

45° × π/180 = 0,7854 rad

ω = θ /t

ω = 0.7854 / 0.75 = 1.0472 rad/s

6 0

2 years ago

HELPPPPPP ! Pleaseeee anyone ?

kenny6666 [7]

Answer:

1 Periodic table

2 Elements

3 atomic number

4 properties

5 Periods

6 groups

7 group number

8 Valence electrons

4 0

2 years ago

Read 2 more answers