If earth had no atmosphere , would a falling object ever reach terminal velocity?

Find the current through a 12 ohm resistive circuit when 24 volts is applied

marusya05 [52]

Answer:

2A

Explanation:

Voltage = Current * Resistance

V= I*R

I=V/R

I = 24/12 = 2A.

5 0

4 years ago

A beam of unpolarized light in air strikes a flat piece of glass at an angle of incidence of 54.2 degrees. If the reflected beam

Stels [109]

Answer:

correct option is B. 1.39

Explanation:

given data

angle of incidence (θ) = 54.2 degrees

to find out

index of refraction of the glass

solution

we know that here reflected beam is completely polarized

so angle of incidence = angle of polarized ....................1

for reflective index we apply here Brewster law that is

μ = tan(θ) ...............2

put here θ value we get

μ = tan(54.2)

μ = 1.386

so correct option is B. 1.39

6 0

3 years ago

Read 2 more answers

Air in the amount of 2 lbm is contained in a well-insulated, rigid vessel equipped with a stirring paddle wheel. The initial sta

vladimir1956 [14]

Explanation:

It is known that energy balance relation is as follows.

$\Delta E_{system} = E_{in} - E_{out}$

Also, $W_{in} = \Delta U$

so, $W_{in} = mC_{v}(T_{2} - T_{1})$

According to the ideal gas equation,

$T_{2} = T_{1} \frac{P_{2}}{P_{1}}$

Putting the values into the above equation as follows.

$T_{2} = T_{1} \frac{P_{2}}{P_{1}}$

= $(520R) \frac{40psia}{30psia}$

= 693.3 R

Now, we will convert the temperature into degree Fahrenheit as follows.

693.3 - 458.67

= $234.63^{o}F$

From table A- $2E_{a}$

$C_{p}$ = 0.240 Btu/lbm R and $C_{v}$ = 0.171 Btu/lbm

Now, we will substitute the energy balance as follows.

$W_{in} = mC_{v}(T_{2} - T_{1})$

= $2 lbm \times 0.171 Btu/lbm R (693.3 - 520)$

= 59.3 Btu

Thus, we can conclude that final temperature of air is 59.3 Btu.

6 0

4 years ago

If a ball is dropped into a very viscous liquid it will

Dafna1 [17]

It will go to the bottom of the liquid very slowly. Good Luck!

7 0

3 years ago

The junction rule describes the conservation of which quantity? Note that this rule applies only to circuits that are in a stead

Fed [463]

Answer:

a) Current.

Explanation:

The "junction rule" (Kirchhoff's first law) says that the value of the electric current entering any point in the circuit must be the same as the one leaving it. This comes as a consequence of the conservation of charge, the electric charge that comes in must come out (when speaking about currents, per unit time).

3 0

3 years ago