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3 years ago

20 pts !!!!

Physics

1 answer:

garri49 [273]3 years ago

4 0

Am not really sure but what i see is D

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A source injects an electron of speed v = 2.9 × 107 m/s into a uniform magnetic field of magnitude B = 1.7 × 10-3 T. The velocit

34kurt

Answer:

r = 0.664 m.

Explanation:

Let's write the equation of the magnetic force, the blacks syndicate vectors

F = q v x B

From this expression we see that the force is perpendicular to the velocity and the field, so it is a centripetal force, the modulus of the force is

F = q v B sinT

We write Newton's second law

F = m a

a = v² / r

q v B sinT = m v² / r

r = m v / (q B sinT)

Let's calculate

r = 9.1 10-31 2.9 107 / (1.6 10-19 1.7 10-3 sin8.4)

r = 26.4 10-24 / 0.3973 10-22

r = 0.664 m

This is the distance from where the electron penetrates

7 0

4 years ago

give me some like COD and mafia 3 like games please! I want like more gore, guts and glory, So for yall gamers out there, give m

Svetlanka [38]

Answer:

any black ops i started playing crysis 3 its good and gta5

Explanation:

3 0

3 years ago

Read 2 more answers

Determine the velocity that a car should have while traveling around a frictionless curve of radius 100m and that is banked 20 d

alex41 [277]

Answer:

$v=18.89\frac{m}{s}$

Explanation:

From the free-body diagram for the car, we have that the normal force has a vertical component and a horizontal component, and this component act as the centripetal force on the car:

$\sum F_x:Nsin(20^\circ)=ma_c(1)\\\sum F_y:Ncos(20^\circ)=mg(2)$

Solving N from (2) and replacing in (1):

$N=\frac{mg}{cos(20^\circ)}\\(\frac{mg}{cos(20^\circ)})sin(20^\circ)=ma_c\\gtan(20^\circ)=a_c$

The centripetal acceleration is given by:

$a_c=\frac{v^2}{r}$

Replacing and solving for v:

$gtan(20^\circ)=\frac{v^2}{r}\\v=\sqrt{grtan(20^\circ)}\\v=\sqrt{9.8\frac{m}{s^2}(100m)tan(20^\circ)}\\v=18.89\frac{m}{s}$

4 0

4 years ago

A rocket travels 1.3 km in 62 ms. What is its average speed in m⋅s−1? Do not give your answer in scientific notation. The answer

hjlf

Answer:

Average speed = 0.35 m/s

Explanation:

Given the following data;

Distance = 1.3 Km

Time = 62 minutes

To find the average speed in m/s;

First of all, we would convert the quantities to their standard unit (S.I) of measurement;

Conversion:

1.3 kilometres to meters = 1.3 * 1000 = 1300 meters

For time;

1 minute = 60 seconds

62 minutes = X

Cross-multiplying, we have;

X = 62 * 60

X = 3720 seconds

Now, we can calculate the average speed in m/s using the formula;

$Speed = \frac {distance}{time}$

$Speed = \frac {1300}{3720}$

Average speed = 0.35 m/s

7 0

3 years ago

What happen when a hurricane crosses over land

Rus_ich [418]

It loses it's fuel supply from the water and begins to weaken

5 0

4 years ago