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3 years ago

An electron enters the magnetic field at right angle from left B into paper. The electron will be deflected?

Physics

1 answer:

prohojiy [21]3 years ago

3 0

Answer:

According to this direction of force is perpendicular to the direction of current and magnetic field. Therefore force is opposite to electron into the paper at 90°.

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In deserts the temperatures can reach extreme values in deep of summer and winter. A steel bridge is being constructed and it is

ryzh [129]

Answer:

The length of the bridge during the hottest part of summer is $L_s = 1235.925 m$

Explanation:

From the question we are told that

The length of the steel bridge is $L = 1234.567m$

The temperature for this length is $T_1 = 233.15K$

The temperature at summer $T_2 = + 140.0F = \frac{140 - 32}{180} *100 + 273= 333 K$

The coefficient of linear expansion is $\alpha = 11.0123*10^{-6} K^{-1}$

Generally the change in length of the steel bridge is mathematically represented as

$\Delta L = \alpha L \Delta T$

Substituting value

$\Delta L = 11.0123*10^{-6} * 1234.567 (333-233.15)$

$\Delta L = 1.3575 \ m$

The length of the bridge in summer is mathematically evaluated as

$L_s = L + \Delta L$

Substituting values

$L_s = 1234.567 + 1.3575$

$L_s = 1235.925 m$

3 0

3 years ago

Can someone please help me?

IRINA_888 [86]

It might be to late but the answer is C

7 0

4 years ago

A = F/m is an explanation of<br> in Physics

Semmy [17]

Answer:

The equation a=F/m or the acceleration is equal to the net force of an object divided by that object's mass, is an equation derived and explained by Sir Issac Newton's second law of motion. Newton's second law of motion states that the force of an object is equal to the mass times the acceleration of that object.

7 0

3 years ago

You're driving down the highway late one night at 20 m/s when a deer steps onto the road 49 m in front of you. You reaction time

Leno4ka [110]

Answer:

v = 26.7 m/s

Explanation:

Given,

speed of the car = 20 m/s

distance between the car and the deer = 49 m

time taken to press the brake = 0.50 s

maximum deceleration of the car = 10 m/s²

Now,

distance travel by the car in 0.5 s = u x t = 20 x 0.5 = 10 m

distance travel by the car after the break is pressed

Using equation of motion

v² = u² + 2 a s

0² = 20² - 2 x 10 x s

s = 20 m

Total distance travel by the car = 20 + 10 = 30 m

Distance between deer and car = 49-30 = 19 m.

b. Maximum speed a car could have

Distance travel by the car in reaction time = v' x 0.5

v' is the maximum speed of the car.

maximum distance car can cover = 49 - 0.5 v'

Now, Using equation of motion

v² = u² + 2 a s

0² =v'² - 2 x 10 x (49- 0.5 x v')

v'² +10 v' -980 = 0

By solving

v = 26.7 m/s

Hence, maximum speed of the car can be 26.7 m/s

4 0

4 years ago

Which phrase describes an atom?

kiruha [24]

You haven't included the list of choices that goes with the question, so it's
impossible for me to choose the correct one, or to help you choose it.

Regarding my ability to answer the question and collect the 5-point bounty,
I'm free to make up any phrase of my own that correctly describes an atom.

-- very very very very very very very tiny

-- includes even tinier particles, with electric charges
both positive and negative

-- smaller than the wavelength of visible light

4 0

3 years ago