Answer:
Valence electrons are the electrons present in the outermost shell of an atom. You can easily determine the number of valence electrons an atom can have by looking at its Group in the periodic table.
Explanation:
Answer:
T = 27.92 N
Explanation:
For this exercise let's use Newton's second law
T - W = m a
The weight
W = mg
The acceleration can be found by derivatives
a = dv / dt
v = 2 t + 0.6 t²
a = 2 + 0.6 t
We replace
T - mg = m (2 + 0.6t)
T = m (g + 2 + 0.6 t) (1)
Let's look for the time for the speed of 15 m / s
15 = 2 t + 0.6 t²
0.6 t² + 2 t - 15 = 0
We solve the second degree equation
t = [-2 ±√(4 - 4 0.6 (-15))] / 2 0.6
t = [-2 ±√40] / 1.3 = [-2 ± 6.325] / 1.2
We take the positive time
t = 3.6 s
Let's calculate from equation 1
T = 2.00 (9.8 + 2 + 0. 6 3.6)
T = 27.92 N
Answer:
Explanation:
given.
Two flat 4.0 cm × 4.0 cm electrodes carrying equal charge
space between the charges = 2 mm
Electric field strength = 7.6 x 10⁶ N/C
ε ₀ = 8.85 × 10⁻¹² C²/N · m²
magnitude of charge =?
Electric field strength between to two plates
A fiber-optic cable is made up of incredibly thin strands of glass or plastic known as optical fibers; one cable can have as few as two strands or as many as several hundred. Light travels down a fiber-optic cable by bouncing repeatedly off the walls. If<span> light hits glass at a really shallow angle (less than 42 degrees), it reflects back in again—as though the glass were really a </span>mirror<span>. This phenomenon is called </span>total internal reflection<span>. It's one of the things that keeps light inside the pipe.</span>
Answer:
Resistance = 4465 Ω - 4935 Ω
Explanation:
The color bands in a four band resistors are read as follows:
Band 1: 1st digit of Resistance
Band 2: 2nd digit of Resistance
Band 3: Multiplier Value
Band 4: Tolerance
Now interpreting our code:
Band 1 (Yellow) = 4
Band 2 (Violet) = 7
Band 3 (Red) = 10²
Band 4 (Gold) = ±5%
Therefore,
Resistance = 47 x 10² Ω ± 5%
Resistance = 4700 Ω ± 5%
So, the range can be calculated as:
Lower Limit = 4700 Ω - (0.05)(4700 Ω)
Lower Limit = 4700 Ω - 235 Ω
Lower Limit = 4465 Ω
No, for upper limit:
Upper Limit = 4700 Ω + (0.05)(4700 Ω)
Upper Limit = 4700 Ω + 235 Ω
Upper Limit = 4935 Ω
Thus, the acceptable range of resistance will be:
<u>Resistance = 4465 Ω - 4935 Ω</u>