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3 years ago

BEST ANSWER WILL BE BRANLIEST!! 70 POINTS!!

Physics

1 answer:

musickatia [10]3 years ago

3 0

Answer:

Explanation:

The speed of light in a vacuum is approximately 3×10⁸ m/s.

In water with η=1.33:

v = (3×10⁸ m/s) / 1.33

v = 2.26×10⁸ m/s

In glass with η=1.50:

v = (3×10⁸ m/s) / 1.50

v = 2.00×10⁸ m/s

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If the axes of the two cylinders are parallel, but displaced from each other by a distance d, determine the resulting electric f

Novay_Z [31]

Answer:

E = ρ ( R1²) / 2 ∈o R

Explanation:

Given data

two cylinders are parallel

distance = d

radial distance = R

d < (R2−R1)

to find out

Express answer in terms of the variables ρE, R1, R2, R3, d, R, and constants

solution

we have two parallel cylinders

so area is 2 $\pi$ R × l

and we apply here gauss law that is

EA = Q(enclosed) / ∈o ......1

so first we find Q(enclosed) = ρ Volume

Q(enclosed) = ρ ( $\pi$ R1² × l )

so put all value in equation 1

we get

EA = Q(enclosed) / ∈o

E(2 $\pi$ R × l) = ρ ( $\pi$ R1² × l ) / ∈o

E = ρ ( R1²) / 2 ∈o R

6 0

4 years ago

A certain corner of a room is selected as the origin of a rectangular coordinate system. If a fly is crawling on an adjacent wal

lisov135 [29]

Answer:

S=2.693m

Explanation:

Let point $O$ be the origin of the room and the fly is crawling at point $P$ as shown in the attached photo:

#Distance of the fly from the corner of the room is defined as:

$OP=S=\sqrt{{(x_1-x_0)^2+(y_1+y_0)^2}$

#Substitute the coordinate values in the above equation:

$S=\sqrt{{(2.6m-0m)^2+(0.7m-0m)^2}}\\=\sqrt{7.25}\\=2.693m$

Hence, the distance of the fly from the corner of the room is 2.693m

6 0

4 years ago

A 60 W light bulb has a resistance of 880 Ω

Andreas93 [3]

<h2> $\bf{ \underline{Given:- }}$ </h2>

$\sf{• \: Power \: (P) = 60 \: w}$

$\sf{• \: Resistance \: (R) = 880 \: Ω}$

$\\$

<h2> $\bf{ \underline{To \: Find :- }}$ </h2>

$\sf• \: The \: Current \: (I).$

$\\$

$\huge\bf{ \underline{ Solution :- }}$

$\sf We \: know \: that,$

$\bf \red {\bigstar{ \: P = I^{2} R}}$

$\rightarrow \sf 60 = I^{2} \times 880$

$\rightarrow \sf \frac{60}{880} = I^{2}$

$\rightarrow \sf I^{2} = 0.0681$

$\rightarrow \sf I = \sqrt{0.0681}$

$\rightarrow \sf I = 0.261 \: \: (approx.)$

$\\$

$\bf The \: \: value \: \: of \: \: I \: \: is \: \: 0.261 \: \: Amps. \: \: (approx.)$

7 0

3 years ago

A cake is removed from a 350◦F oven and placed on a cooling rack in a 70◦F room. After 30 minutes the cake is 200◦F. When will i

galben [10]

Answer:

350 F to 100 F it take approx 87.33 min

Explanation:

given data

oven = 350◦F

cooling rack = 70◦F

time = 30 min

cake = 200◦F

solution

we apply here Newtons law of cooling

$\frac{dT}{dt}$ = -k(T-Ta)

$\frac{dy}{dt}$ = $\frac{d}{dt}$ (T(t) -Ta)

= $\frac{dT}{dt} -\frac{dTa}{dt} =\frac{dT}{dt}$ = -k(T-Ta)

-ky $\frac{dy}{dt}$ = -ky

T(t) -Ta = (To -Ta) $e^{-kt}$ T(t) = Ta+ (To -Ta) $e^{-kt}$

put her value for time 30 min and T(t) = 200◦F and To =350◦F and Ta = 70◦F

so here

200 = 70 + ( 350 - 70 ) $e^{-k30}$

k = 0.025575

so here for T(t) = 100F

100 = 70 + ( 350 - 70 ) $e^{-0.025575*t}$

time = 87.33 min

so here 350 F to 100 F it take approx 87.33 min

5 0

4 years ago

Which states the purpose of an experiment?

Whitepunk [10]

B; to produce a hypothesis.

6 0

3 years ago

Read 2 more answers