Answer: The temperature at which the intrinsic concentration exceeds the impurity density by factor of 10 is 636 K.
Explanation:
The given data is as follows.
As we are given that 
exceeds impurity density by a factor of 10.
Therefore, 
T = 1985 K
Also,
T = 636 K
Thus, we can conclude that the temperature at which the intrinsic concentration exceeds the impurity density by factor of 10 is 636 K.
The answer is A and B.
The absence of meteorites within the Earth's rock layers indicates that : the rocks formed rapidly
and that the rock layers are young.
It is wright.It will help you.
Please mark me as brainiest.
Answer:a
Explanation:
Given
two bodies are falling with negligible air Resistance and one of the body is given a slight horizontal acceleration
since there is no change in vertical acceleration therefore time taken by both bodies is same irrespective of change in horizontal direction
suppose both start from rest from a height of h
time taken
The only difference is that body with horizontal acceleration will be some distance away from first
you have V = π x r² x L right?
and you know mass and density.... and density = mass / volume....right?
rearranging...(ρ = density, m = mass, V = volume)
V = m / ρ V = π x r² x L
m / ρ = π x r² x L
but r = D/2 {where D is diameter} so r² = (D/2)² = D² / 4
m / ρ = π x (D² / 4) x L
L = 4 x m / (π x ρ x D²)
L = 4 x m x (1/ π) x (1/ρ) x (1/ D²) {makes it easier to see next step}
L = 4 x (150 lbs) x (454 g / lb) x ( 1/ 3.1415) x (1 cm³ / 8.94 g) x (1 / 8.25 mm)² x (10 mm / 1 cm)² = 14250 cm
still with me?
14250 cm x (1 in / 2.54 cm) x (1 ft / 12 in) = 468 ft....{ 3 sig figs}
*****alternately, you can break up the steps..*********
150 lbs x (454 g/lb) = 68,100 g Cu
68,100g Cu x (1 cm³ / 8.94 g) = 7617 cm³ copper
diameter of wire = 8.25 mm = .825 cm so radius of wire = 0.4125 cm
7617 cm³ = (3.14) x r² x L = 3.14 x (.4125 cm)² x L
7617 cm³ = 0.534 cm² L
L = 7617 cm³ / 0.534 cm² = 14250 cm
14250 cm x (1 in / 2.54 cm) x (1 ft / 12 in) = 468 ft....{ 3 sig figs}
"If air in a pump is squeezed more, then the air gets hotter because energy is added to it" is a good hypothesis that could lead to new experimentation.
<u>Option: C</u>
<u>Explanation:</u>
If we use a pump to inflate a basketball, we initially pull the handle to draw air to fill the sphere in. As we move it down we apply a great deal of force to pump in air through the pin's tiny hole because of this resistance force in the air we find the tube warmed.
A needle of ball pump is a metal tube in which air, from an inflating pump to a sports ball, moves through it. In continuous-flow operation, pumps are often used and built to produce comparatively little pressure towards a free-flowing environment with limited back pressure. Such pumps have a fixed configuration and work freely along their power curve as circumstances change.
