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3 years ago

Which three elements have the most similar chemical properties?

Physics

2 answers:

vekshin13 years ago

7 0

It’s c explanation they are all metal

Montano1993 [528]3 years ago

3 0

Answer:

Explanation:

all are metals

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2. A toy car runs off the edge of the table that is 1.225 m high. If the car lands 0.400 m from the

kiruha [24]

Answer:

45 hoursss to reach

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7 0

3 years ago

Show explicitly that ▽ . B-0 near a long straight wire carrying a current I. HINT: you may use Cartesian coordinates, but anothe

aivan3 [116]

Answer:

$\bigtriangledown.B=0$ is proved.

Explanation:

The magnetic field in the long current carrying wire is,

$B=\frac{\mu_{0}I }{2\pi r } \phi$

Here, I is the current, B is the magnetic field.

Now, by using cylindrical coordinates for the divergence of B.

$\bigtriangledown.B=\frac{1}{s} \frac{d}{d\phi} B$

Put the value of B in above equation.

$\bigtriangledown.B=\frac{1}{s} \frac{d}{d\phi}(\frac{\mu_{0}I }{2\pi r } \phi)\\\bigtriangledown.B=0$

Hence, it is prove that for a long current I carrying wire magnetic field divergence that is $\bigtriangledown.B=0$ .

7 0

3 years ago

Give a example of frequency which an elephant can hear and a tiger cannot hear include a unit in ansawer

lisov135 [29]

P1.5.3 thats what i got........... hope its right not sure though

4 0

3 years ago

The diameter of an automobile tire is closest to

slamgirl [31]

Answer:

(1) 10^−2 m

Explanation:

The diameter of the tire of an automobile is generally expressed in centimetres; we can say that the diameter of a tire is generally about

d = 20 cm (20 centimetres)

Now we have to verify which option is closest to this value. To do that, we have to keep in mind the equivalence between metres and centimetres; in fact, we have:

$1 cm = 10^{-2} m$

This means that we can rewrite the diameter of the tire of a car as

$d=20 cm = 20\cdot 10^{-2} m$

By comparing it with the given options, we see that the closest option is

(1) 10^−2 m

which is therefore the correct answer.

6 0

4 years ago

A 0.280-kg volleyball approaches a player horizontally with a speed of 15.0 m/s. The player strikes the ball with her fist and c

Genrish500 [490]

Answer:

Impulse = 10.36 kg m/s

average force = 172.667 N

Explanation:

given data

mass = 0.280 kg

speed = 15.0 m/s

speed = 22.0 m/s

to find out

impulse and magnitude of the average force

solution

we know that Impulse is change in momentum that is

initial momentum = mass × speed ..........1

initial momentum = 0.28 × (15)

initial momentum = 4.2 kg m/s

Final momentum = mass × speed ..........2

Final momentum = 0.28 × (-22)

Final momentum = -6.16 kg m/s

so now we get Impulse that is

Impulse = 4.2 - (-6.16)

Impulse = 10.36 kg m/s

and

average force will be

average force = impulse ÷ time

average force = $\frac{10.36}{0.060}$

average force = 172.667 N

6 0

3 years ago