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Lena [83]
3 years ago
10

How to know if an element is a good conductor?

Physics
1 answer:
scoray [572]3 years ago
7 0
U know if an element is a good conductor when the element internal resistance is low
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A 12V battery runs a 30 amp car stereo. What is the resistance of the circuit?
Airida [17]
So to find R (resistance) you do ohm's law  E (volts) over I (current) to find R
So this is 12/30 = 0.4 so the resistance is 0.4
6 0
3 years ago
Suppose that you take a 10 kg mass on the surface of the earth and then place it on the moon. What will
sergey [27]

Answer:

10 kg

Explanation:

The mass of an object does not change even if the amount of gravtiy changes.

5 0
3 years ago
Una persona en la tierra tiene una masa de 70[kg]. Calcule: a) Su fuerza peso en la tierra. b) Su fuerza peso en la luna (consid
padilas [110]

Answer:

a. El peso = 686 Newton

b. El peso = 113.4 Newton

Explanation:

Dados los siguientes datos;

Masa = 70 kg

Aceleración debida a la gravedad en la luna = 1,62 m/s² una.

a. Para encontrar la fuerza-peso en la Tierra;

Sabemos que la aceleración debida a la gravedad es igual a 9,8 m/s² en el planeta Tierra.

El peso se puede definir como la fuerza que actúa sobre un cuerpo o un objeto como resultado de la gravedad.

Matemáticamente, el peso de un objeto viene dado por la fórmula;

Peso = mg

Dónde;

m es la masa del objeto.

g es la aceleración debida a la gravedad.

Substituting into the formula, we have;

El peso = 70 * 9.8

El peso = 686 Newton

b. To find weight on moon;

Weight = mass * acceleration due to gravity on moon

Weight = 70 * 1.62

Weight = 113.4 Newton

7 0
3 years ago
Which statement best describes air pressure at high altitudes?
weeeeeb [17]

Answer:

Air pressure decreases as altitude increases.

Explanation:

5 0
3 years ago
Question 17 of 25
Scorpion4ik [409]

Answer:

The speed of the wave as it travelled through the brass bell is;

B. 4,700 m/s

Explanation:

The given parameters are;

The wavelength of the sound wave produced from the brass bell, \lambda _{(air)}  = 3.5 m

The wavelength of the wave in the brass bell, \lambda _{(brass \ bell)}  = 47 m

The frequency of the wave in the brass bell, f = 100 Hz

The given equation for wave speed, v = f × λ

Therefore, the speed of the wave as it travelled through the brass bell, v _{(brass \ bell)}, is given as follows;

v _{(brass \ bell)} = f × \lambda _{(brass \ bell)} = 100 Hz × 47 m = 4,700 m/s  

The speed of the wave as it travelled through the brass bell =  v _{(brass \ bell)} = 4,700 m/s

5 0
3 years ago
Read 2 more answers
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