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4 years ago

Is winking a genetic and why?

Physics

2 answers:

Blababa [14]4 years ago

6 0

No, because the ability to wink can be learned, and abilities that can be learned aren't genetic.

PolarNik [594]4 years ago

4 0

Yes,and because not everyone can wink and often that someone can only wink with one eye only

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A 0.5kg bird has a PE of 137.2 J. What height is its perch?

jekas [21]

PE = mgh

137.2 = .5*9.8*h

h=137.2/(.5*9.8)

7 0

3 years ago

Read 2 more answers

5. Alex goes cruising on his dirt bike. He rides 700 m north, 300 m east, 400 m north, 600 m west, 1200 m south 300 m east and f

Gala2k [10]

Answer:

Explanation:

i hope your mind is clear your full answer in image

please see in image

5 0

3 years ago

How much heat is absorbed by a 66g iron skillet when its temperature rises from 7oC to 20oC?

fenix001 [56]

The heat absorbed is calculated using the following equation:
Q = mCΔT

Q = heat absorbed
m = mass = 66 g
C = specific heat of iron = 0.449 J/g.°C
ΔT = temperature change = 20 - 7 =13°C

Therefore,
Q = 66*0.449*13 = 385.242 J

3 0

3 years ago

Two point charges of +20.0 μC and -8.00 μC are separated by a distance of 20.0 cm. What is the intensity of electric field E mid

algol13

Answer:

The intensity of the net electric field will:

$E_{net}=E_{1}+E_{2}=2.52*10^{7}\: N/C$

Explanation:

Here we need first find the electric field due to the first charge at the midway point.

The electric field equation is given by:

$|E_{1}|=k\frac{q_{1}}{d^{2}}$

Where:

k is Coulomb's constant
q(1) is 20.00 μC or 20*10⁻⁶ C
d is the distance from q1 to the midpoint (d=10.0 cm)

So, we will have:

$|E_{1}|=(9*10^{9})\frac{20*10^{-6}}{0.1^{2}}$

$|E_{1}|=1.8*10^{7}\: N/C$

The direction of E1 is to the right of the midpoint.

Now, the second electric field is:

$|E_{2}|=k\frac{q_{2}}{d^{2}}$

$|E_{2}|=(9*10^{9})\frac{8*10^{-6}}{0.1^{2}}$

$|E_{2}|=7.2*10^{6}\: N/C$

The direction of E2 is to the right of the midpoint because the second charge is negative.

Finally, the intensity of the net electric field will:

$E_{net}=E_{1}+E_{2}=2.52*10^{7}\: N/C$

I hope it helps you!

5 0

3 years ago

A window in a house has a rectangular shape of 2.0 m by 1.0 m. The glass in the window is 0.5 cm thick, with a thermal conductiv

KonstantinChe [14]

Answer:

P = 5280 W

Explanation:

The conductivity of the materials determines that heat flows from the hot part to the cold part, the equation for thermal conductivity transfer is

P = Q / t = k A ( $T_{h}$ - $T_{c}$ ) / L

Where k is the thermal conductivity of the glass 0.8 W / ºC, A the area of the window, T the temperature and L is glass thickness

Let's calculate the window area

A = l * a

A = 2.0 1.0

A = 2.0 m²

Let's replace

L = 0.5 cm (1 m / 100 cm) = 0.005 m

P = 0.8 2 (20.5 - 4) / 0.005

P = 5280 W

7 0

3 years ago