Answer:
3.0m
Explanation:
Because the image distance(v) =object distance(u)
v+u=1.5+1.5=3.0m
Answer:
638 m.
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 94 m/s
Final velocity (v) = 22 m/s
Time (t) = 11 s
Distance (s) =?
We can obtain the distance travelled by using the following formula:
s = (u + v) t /2
s = (94 + 22) × 11 /2
s = 116 × 11 /2
s = 1276 /2
s = 638 m
Thus, the distance travelled is 638 m.
Answer:
No. of Molecules = 18.06 x 10²³ molecules
No. of Atoms of P = 3 atoms
No. of Atoms of Na = 9 atoms
Total No. of Atoms = 24 atoms
Explanation:
<u>FOR NUMBER OF MOLECULES</u>:
<u>No. of Molecules = 18.06 x 10²³ molecules</u>
<u></u>
<u>FOR NUMBER OF P ATOMS</u>:
<u>No. of Atoms of P = 3 atoms</u>
<u></u>
<u>FOR NUMBER OF Na ATOMS</u>:
<u>No. of Atoms of Na = 9 atoms</u>
<u></u>
<u>FOR TOTAL NUMBER OF ATOMS</u>:
<u>Total No. of Atoms = 24 atoms</u>
<u></u>
<u></u>
Answer:
42000N
Explanation:
First you calculate how much it would contract, and secondly you then calculate the force to stretch it by that amount.
1) linear thermal expansion coef brass 19e-6 /K
∆L = αL∆T = (19e-6)(1.85)(110) = 0.00387 meter or 3.87 mm
Second part involves linear elasticity.
for brass, young's modulus is 15e6 psi or 100 GPa
cross-sectional area of rod is π(0.008)² = 0.0002 m²
F = EA∆L/L
F = (100e9)(0.0002)(0.00387) / (1.85)
F = 42000 or 42 kN
Answer:
Therefore,
Current required is , I
Explanation:
Given:
Turns = N = 1140
length of solenoid = l = 0.415 m
Magnetic Field,
To Find:
Current , I = ?
Solution:
If N is the number of turns in the length, the total current through the rectangle is NI. Therefore, Ampere’s law applied to this path gives
Where,
B = Strength of magnetic field
l = Length of solenoid
N = Number of turns
I = Current
Therefore,
Substituting the values we get
Therefore,
Current required is , I