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MA_775_DIABLO [31]
3 years ago
7

Can someone tell me the acceleration?

Physics
1 answer:
maw [93]3 years ago
5 0
Acceleration is the speed of an object speeding up
Whether it is velocity or just speed
You might be interested in
If an electronin an electron beam experiences a downward force of 2.0x10^-14N while traveling in a magnetic field of 8.3x10^-2T
Anni [7]

Answer:

Explanation:

Given that,

Force is downward I.e negative y-axis

F = -2 × 10^-14 •j N

Magnetic field is westward, +x direction

B = 8.3 × 10^-2 •i T

Charge of an electron

q = 1.6 × 10^-19C

Velocity and it direction?

Force in a magnetic field is given as

F = q(V×B)

Angle between V and B is 270, check attachment

The cross product of velocity and magnetic field

F =qVB•Sin270

2 × 10^-14 = 1.6 × 10^-19 × V × 8.3 × 10^-2

Then,

v = 2 × 10^-14 / (1.6 × 10^-19 × 8.3 × 10^-2)

v = 1.51 × 10^6 m/s

Direction of the force

Let x be the direction of v

-F•j = v•x × B•i

From cross product

We know that

i×j = k, j×i = -k

j×k =i, k×j = -i

k×i = j, i×k = -j OR -k×i = -j

Comparing -k×i = -j to given problem

We notice that

-F•j = q ( -V•k × B×i)

So, the direction of V is negative z- direction

V = -1.51 × 10^6 •k m/s

6 0
2 years ago
PLS HELP
Kazeer [188]
The answer would be letter choice B
7 0
3 years ago
The model of the universe that suggests that the sun is the center of the universe was first brought by
gladu [14]
I think the correct answer from the choices listed above is option D. The model of the universe that suggests that the sun is the center of the universe was first brought by Copernicus. His model is known as the "Sun centered model".
5 0
3 years ago
Read 2 more answers
Find the wavelength of a 26 Hz sound wave traveling through air at 20ºC. Hint: speed of sound at 20ºC = 343 m/s
Usimov [2.4K]
The correct answer for the question that is being presented above is this one: "B. 13m." 

The formula of wave velocity is this:
wave velocity = f * <span>λ
</span>λ = v / f
<span>λ</span> = 343m/s / 26Hz
λ = 13.20m .. ans (b) 

Here are the following choices:
A. 5m 
B. 13m 
C. 28m 
D. 58m 
3 0
3 years ago
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of
algol13

Answer:

0.0768 revolutions per day

Explanation:

R = Radius

\omega = Angular velocity

As the mass is conserved the angular momentum is conserved

I_1\omega_1=I_2\omega_2\\\Rightarrow \frac{I_1}{I_2}=\frac{\omega_2}{\omega_1}

Moment of intertia for solid sphere

I_1=\frac{2}{5}MR^2\\\Rightarrow I_1=0.4MR^2

Moment of intertia for hollow sphere

I_2=\frac{2}{3}M(4.3R)^2\\\Rightarrow I_2=12.327MR^2

Dividing the moment of inertia

\frac{I_1}{I_1}=\frac{0.4MR^2}{12.327MR^2}\\\Rightarrow \frac{I_1}{I_2}=0.032

From the first equation

\omega_2=\omega_1\frac{I_1}{I_2}\\\Rightarrow \omega_2=2.4\times 0.032\\\Rightarrow \omega_2=0.0768\ rev\day

The angular velocity, in revolutions per day, of the expanding supernova shell is 0.0768 revolutions per day

8 0
3 years ago
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