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bulgar [2K]
3 years ago
10

A student puts a besker of warm water next to a besker of cold water so that they fough which two statements are true? DA Therma

l energy will move from the warm water to the cold water Thermal energy will move from the air to the cold water. Thermal energy utill move from the air to the warm water Thermal energy till move from the cold water to the warm water ​
Physics
1 answer:
sladkih [1.3K]3 years ago
3 0

Explanation:

so sorry

don't know but please mark me as brainliest please

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One electron collides elastically with a second electron initially at rest. After the collision, the radii of their trajectories
ch4aika [34]

Answer:

114.92749 keV

Explanation:

r = Radius of trajectory

m = Mass of electron = 9.11\times 10^{-31}\ kg

B = Magnetic field = 0.044 T

q = Charge of electron = 1.6\times 10^{-19}\ C

The centripetal force and the magnetic forces are conserved

m\frac{v^2}{r}=Bqv\\\Rightarrow v=\frac{Bqr}{m}

Velocity of first electron

v=\frac{Bqr_1}{m}\\\Rightarrow v=\frac{0.044\times 1.6\times 10^{-19}\times 0.01}{9.11\times 10^{-31}}\\\Rightarrow v_1=77277716.79473\ m/s

Velocity of second electron

v=\frac{Bqr_2}{m}\\\Rightarrow v_2=\frac{0.044\times 1.6\times 10^{-19}\times 0.024}{9.11\times 10^{-31}}\\\Rightarrow v_2=185466520.30735\ m/s

Total kinetic energy is given by

K=K_1+K_2\\\Rightarrow K=\frac{1}{2}mv_1^2+\frac{1}{2}mv_2^2\\\Rightarrow K=\frac{1}{2}m(v_1^2+v_2^2)\\\Rightarrow K=\frac{1}{2}\times 9.11\times 10^{-31}(77277716.79473^2+185466520.30735^2)\\\Rightarrow K=1.83884\times 10^{-14}\ J

Converting to eV

1\ J=\frac{1}{1.6\times 10^{-19}}\ eV

1.83884\times 10^{-14}\ J=1.83884\times 10^{-14}\times \frac{1}{1.6\times 10^{-19}}\ eV\\ =114927.49\ ev=114.92749\ keV

The energy of incident electron is 114.92749 keV

5 0
4 years ago
the statement that current is equal to the voltage difference divided by the resistance is known as what
dangina [55]

Answer:it is known as (Ohm's law)

Explanation:

3 0
3 years ago
The Earth's crust is made of tectonic plates. These plates are constantly in motion. How are earthquakes related to the movement
never [62]

Answer:

I'm pretty sure it's B because I studied this topic and I'm not right I'm sorry.

5 0
3 years ago
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SIZIF [17.4K]
The correct answer is the Sun.i hope that helped! if you have any questions or concerns about the answer i gave you please let me know!!
4 0
4 years ago
Please help I will mark brainliest!!
STatiana [176]
Heat makes things expand, so in hot water the ballon will get bigger
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3 years ago
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