What is the total current flowing through a 45 ohm resistor (1.4 amps) and a 20 ohm resistor (1.8 amps)?

А)

Anastaziya [24]

Answer:

4.5s

Explanation:

u=30m/s

v=50m/s

s=180m

a=constant(given)

By third equation of motion, v

2

=u

2

+2as

(50)

2

=(30)

2

+2a(180)

a=

3

40

m/s

2

By first equation of motion, v=u+at

50=30+(

9

40

)t

t=

2

9

=4.5sec

4 0

2 years ago

Which type of wave would actually slow down when moving from the air into the ocean?

kvasek [131]

Any electromagnetic wave, like light or heat.

5 0

3 years ago

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An electron moving with a velocity v⃗ = 5.0 × 107 m/s i^ enters a region of space where perpendicular electric and a magnetic fi

stiv31 [10]

Answer:

Magnetic field, $B=2\times 10^{-4}\ T$

Explanation:

Given that,

Velocity of electron, $v=5\times 10^7\ m/s$

It enters a region of space where perpendicular electric and a magnetic fields are present.

Magnitude of electric field, $E=10^4\ V/m$

We need to find the magnetic field will allow the electron to go through the region without being deflected.

Magnetic force on the electron, $F_m=qvB\ sin\theta$ .......(1)

Electric force on the electron, F = q E........(2)

From equation (1) and (2) we get:

$qvB\ sin\theta=qE$

$B=\dfrac{E}{v}$

$B=\dfrac{10^4\ V/m}{5\times 10^7\ m/s}$

B = 0.0002 T

or

$B=2\times 10^{-4}\ T$

Hence, this is the required solution.

3 0

3 years ago

You are doing an experiment to determine how many passengers would fit into a full-sized plane. If a scale model plane has space

romanna [79]

The real place should theoretically have space for 87 passengers if it is an exact model and doesn't have modifications in the seat numbers.

5 0

3 years ago

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During crystallisation the crystals separate out from the hot ________solution of a substance on cooling

alekssr [168]

Answer:

The process of separation or deposition of crystals from a hot saturated solution on gentle cooling of the solution is called 'crystallisation'.

Explanation:

6 0

2 years ago