The north pole of one bar magnet is near the south pole of another bar

What is the relationship between dominant and recessive genes

Triss [41]

Dominant genes and recessive genes are both given to a parents offspring. However, not both can be expressed causing the difference of dominant and recessive. Dominant genes are more likely to be expressed and recessive genes are more likely to be repressed.

7 0

3 years ago

An airplane is flying through a thundercloud at a height of 2000 m (This is a very dangerous thing to do because of updrafts, tu

Doss [256]

Answer:

$400000\ \text{N/C}$

Explanation:

$q_1$ = Charge at 3000 m = 40 C

$q_2$ = Charge at 1000 m = -40 C

$r_1$ = 3000 m

$r_2$ = 1000 m

k = Coulomb constant = $9\times10^9\ \text{Nm}^2/\text{C}^2$

Electric field due to the charge at 3000 m

$E_1=\dfrac{k|q_1|}{r_1^2}\\\Rightarrow E_1=\dfrac{9\times 10^9\times 40}{3000^2}\\\Rightarrow E_1=40000\ \text{N/C}$

Electric field due to the charge at 1000 m

$E_2=\dfrac{k|q_2|}{r_2^2}\\\Rightarrow E_2=\dfrac{9\times 10^9\times 40}{1000^2}\\\Rightarrow E_2=360000\ \text{N/C}$

Electric field at the aircraft is $E_1+E_2=40000+360000=400000\ \text{N/C}$ .

7 0

3 years ago

Phosphorus bursts into flame when exposed to oxygen. What element might be used when storing pure phosphorus to keep it from rea

bekas [8.4K]

<h3><u>Answer;</u></h3>

Argon

<h3><u>Explanation;</u></h3>

Phosphorus is an element found in group 15 of the periodic table, it is one of the element that belongs to nitrogen family.
The element phosphorus exhibits allotrophy, namely; white phosphorus, red phosphorus and black phosphorus.
<u>Phosphorus, particularly the white phosphorus combines with oxygen so easily that it catches fire automatically. Thus, as a safety precaution, white phosphorus is stored under water in laboratories. </u>
<u>It may be also stored in argon, since argon is an inert element which belongs to the noble gases group.</u>

4 0

2 years ago

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Given that the acceleration of gravity at the surface of Mars is0.38 of what it is one Earth, and that Mars' radius is 3400 km,d

evablogger [386]

Answer:

$1.156\times 10^{24}\ kg$

Explanation:

Given:

Gravity of Mars = 0.38 times the gravity at Earth

Gravity of Earth is, $g_{Earth}=9.8\ m/s^2$

Radius of Mars (R) = 3400 km

Mass of mars (M) = ?

We know that, the acceleration due to gravity of a planet of mass 'M' and radius 'R' is given as:

$g=\dfrac{GM}{R^2}$

Now, as per question:

$g_{Mars}=0.68g_{Earth}$

Plug in 9.8 for $g_{Earth}$ and solve for $g_{Mars}$ . This gives,

$g_{Mars}=0.68\times 9.8=6.67\ m/s^2$

Now, plug in this value in the above equation and solve for 'M'. This gives,

$6.67=\frac{6.67\times 10^{-11}M}{(3400\times 10^3)^2}\\\\1.156\times 10^{13}=10^{-11}M\\\\M=\frac{1.156\times 10^{13}}{10^{-11}}\\\\M=1.156\times 10^{24}\ kg$

Therefore, the mass of Mars is $1.156\times 10^{24}\ kg$ .

4 0

2 years ago

I need help with these questions :<br>(see image )

IRISSAK [1]

Answer:number one is

a

Explanation:

I took this test

4 0

3 years ago

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