All categories

3 years ago

What are semi- conductors?

1 answer:

3 0

A solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. answer from google

You might be interested in

A uniform bridge, 20 m long and weighing 40000 N is supported by two pillars located 3.0 m from each end. If a 19600 N car is pa

vodomira [7]

Let the forces on two pillars are N1 and N2

so we will have force balance equation as

$N_1 + N_2 = 40000 + 19600$

$N_1 + N_2 = 59600 N$

also by torque balance we will have

$N_2\times L = 40000 ]times \frac{L}{2} + 19600 \times 8$

here we know that

L = 20 m

$N_2 (20 m) = 40000 (10 m) + 19600 (8 m)$

$N_2 = 27840 N$

$N_1 = 59600 - 27840 = 31760 N$

8 0

3 years ago

11. An example of a compound is<br> A. salt<br> B. salt water<br> C. sodium<br> D. soft drinks

katovenus [111]

Answer:

The correct answer is: A. salt

Explanation:

The salt corresponds to sodium chloride, whose chemical formula is NaCl. A compound is defined as that substance formed by a combination of 2 or more atoms.

8 0

3 years ago

In a cold pack, an ___________ reaction draws heat from the surroundings. A. exothermic B. endothermic C. exergonic

elena-s [515]

In a cold pack, an endothermic reaction draws heat from the surroundings, although there are several different types of cold packs, some with different reactions.

8 0

4 years ago

Read 2 more answers

Two children, Ferdinand and Isabella, are playing with a waterhose on a sunny summer day. Isabella is holding the hose in herhan

sweet [91]

Answer:

84.196%

Explanation:

g = Acceleration due to gravity = 9.81 m/s²

$y_0=1\ m$

x = 10 m

t = Time taken

$v_0$ = 3.5 m/s (assumed, as it is not given)

$A_0$ = $\pi 1.5^2$

We have the equation

$y=y_0+ut+\dfrac{1}{2}gt^2\\\Rightarrow 0=y_0-\dfrac{1}{2}gt^2\\\Rightarrow t=\sqrt{\dfrac{2y_0}{g}}\\\Rightarrow t=\sqrt{\dfrac{2\times 1}{9.81}}\\\Rightarrow t=0.45152\ s$