<h3><u>Given</u><u>:</u><u>-</u></h3>
- Initial velocity,u = 23 m/s
- Acceleration,a = 1.8 m/s²
<h3><u>To</u><u> </u><u>be</u><u> </u><u>calculated:-</u><u> </u></h3>
Calculate the final velocity,v .
<h3><u>Solution:-</u><u> </u></h3>
As we know that,
Acceleration = v - u / t
⇒ 1.8 = v - 23 / 6.8
⇒ 1.8 × 6.8 = v - 23
⇒ 12.24 = v - 23
⇒ v = 12.24 + 23
⇒ v = 35.24 m/s
Thus,the final velocity of a car is 32.24 meters per seconds.
Seven
<em><u>Formula</u></em>
I'm assuming that the formula used is
R = R_ref [1 + α*(T - T_ref)=
<em><u>Givens</u></em>
- R_ref is the starting resistance of 100 ohms
- α (alpha) = 4.0 *10^-4 or 0.00040
- T_ref = 11.5 degrees Celcius
- T = 10 degrees.
- R=??
<em><u>Solution</u></em>
R = 100[ 1 + 4.0*10^4(10 - 11.5)] Collapse the brackets.
R = 100[ 1 + 4.0*10^4(-1.5)] Simplify
R = 100[1 - 0.00060] Subtract
R = 100[0.9994] Multiply
R = 99.94
Answer: A
Eight
The accepted formula for resistance and resistivity is
R = ρ * A / L where
rho is the resistivity
A is the face Area of the conductor
L is the length of the conductor.
Now a perfect conductor has a resistance of 0.
So since resistivity is a direct variation with resistance, its value also has to be 0.
Answer: A
Nine
The formula you need for this is W = I^2* R
W = 14 Watts
R = 17 ohms
I = ??
14 = I^2 * 17 Divide bother sides by 17
14/17 = I^2
0.8235 = I^2 Switch and take the square root of both sides.
I = sqrt(0.8234)
I = 0.9075 Answer: D
I'll put my answer in the comments but, part of the question is cut off do you mind putting a more readable and not sideways picture?
Answer: 4
Explanation: when you're solving velocity you should divide the two numbers so 16/4=4
Answer:
a. v' = 24.22 x 10 ⁻³
b. β = 0.825 T
Explanation:
V = 150 V , E = 6.0 x 10 ⁶ N / C
a.
¹/₂ * m * v² = e * V
v = √ 2 * e / m * V
v = √ 2 * 1.76 x 10 ¹¹ * 150 v = √ 5.28 x 10 ¹³
v = 7.26 x 10 ⁶ m /s
v' / c = 7.26 x 10 ⁶ m /s / 3.0 x 10 ⁸ = 24.22 x 10 ⁻³
b.
β = E / V
β = 6.0 x 10 ⁶ / 7.266 x 10 ⁶
β = 0.825 T
c.
When the increasing the accelerating potential speed it doesn't change the up wired the electric force and the magnetic force the electron be beat down more .