Answer:
Explanation:
Given that,
Charge on an electron is
q=1.609×10^-19C
Speed of electron V=4×10^5 m/s in positive x direction
V = 4×10^5 •i m/s
At this point F=0N
When the electron is moving in positive y direction
V =4×10^5 •j m/s
F = 3.2×10^-13 N in positive z direction.
F = 3.2×10 ^-13 •k N
What is the direction and magnitude of the magnetic field B?
The force in a magnetic field is given as
F = q (V ×B)
The only time V×B is zero is when both V and B are in same direction
This shows that B is in the positive x direction or negative x direction
i.e B= Bx •i
Now applying this to the second condition
F= q(V×B)
3.2×10^-13 •k =1.609×10^-19 × (4×10^5•j ×Bx •i)
Note that, j×i =-k
3.2×10^-13 •k / 1.609×10^-19 = (4×10^5Bx •(j×i))
1988812.927 •k =- 4×10^5Bx•k
1988812.927/4×10^5 •k =-Bx •k
4.972 •k =-Bx •k
Then, Bx = -4.972 •k Telsa
Then, the magnitude of B is
B=4.972 T
And its direction is negative z direction.
The relationships to determine the number of calories to change 0.50 kg of 0°C ice to 0°C ice water is 1,080,000 cal.
<h3>How does heating ice that is at C affect it?</h3>
Ice melts and becomes liquid water at 0 degrees Celsius. Once all of the ice has been entirely transformed into liquid water, the temperature of the remaining ice begins to increase once more (in °C), continuing to rise until it reaches 100 °C, where it then stabilizes.
The water turns into steam when it reaches a temperature of 100 °C (D).
Water has a fusion latent heat of fusion of 80 cal/g.
Water has a 1 cal/g-C specific heat.
Water has a 540 cal/g latent heat of vaporization.
In light of this, the total amount of heat needed is 1500 g [(80 cal/g) + (1 cal/g-C)(100 - 0)C + (540 cal/g)] = 1500 g [(720 cal/g)] = 1,080,000 cal.
To learn more about Vaporization refer to:
brainly.com/question/26306578
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Answer:
a. 1.64 m/s²
Explanation:
Centripetal acceleration is the square of tangential velocity divided by the radius.
a = v²/r
First, convert km/h to m/s.
30.0 km/h (1000 m/km) (1 h / 3600 s) = 8.33 m/s
Find the acceleration.
a = (8.33 m/s)² / (42.4 m)
a = 1.64 m/s²
Answer:
Our eyes are most sensitive to the wavelengths corresponding to the yellow and green colors of the spectrum. Flashy signs and some fire engines are painted in a yellowish-green color to attract our attention.
Answer: 800
Explanation:
1/2 x m x v^2 = m x g x h
KE = 10 x 10 x 8
KE= 800
