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2 years ago

Plz quick I'll give brainlest ....Which one of the following is wrong statement?

2 answers:

7 0

OPTION B) THE SPEED OF SOUND IN STONE IS SLOWER THAN IN WOOL -- FALSE

Explanation:

A) YES ALL MATERIALS CAN TRANSMIT SOUND.

C) YES SOUND CANNOT MOVE IN VACUUM.

D) YES SOUND LOSES ITS ENERGY AS IT TRAVELS.

THIS THREE OPTION ARE TRUE. BUT OPTION B) IS WRONG.

HOPE IT HELP.....❤❤❤

scoundrel [369]2 years ago

6 0

Answer:

B. The speed of sound in stone is slower than in wool.

Explanation:

A. All materials can transmit sound. True

Solids, liquids and gases can transmit sound even though the degree of transmission varies.

C. Sounds cannot move in vacuum. True

Sound cannot transmit in space. You can prove it using the "bell jar" experiment.

D. Sound loses its energy as it travels. True

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Which is true of the buoyant force?

victus00 [196]

It acts in the upward direction.

8 0

2 years ago

A yellow and green car traveled 400 miles to Dayton, OH. The green car made the trip in 10 hours. The yellow arrived in 8 hours.

elixir [45]

Answer: C)The yellow car was faster. Yellow traveled at a speed of 50 mph while green was traveling at an average of 40 mph.

Explanation:

The speed of each car is defined as:

$v=\frac{d}{t}$

where d is the distance traveled by the car and t is the time taken.

For the yellow car, d=400 mi and t=8 h, so its speed is

$v=\frac{400 mi}{8 h}=50 mph$

For the green car, d=400 mi and t=10 h, so its speed is

$v=\frac{400 mi}{10 h}=40 mph$

So, the correct choice is

C)The yellow car was faster. Yellow traveled at a speed of 50 mph while green was traveling at an average of 40 mph.

4 0

3 years ago

Read 2 more answers

2) If the initial velocity of an object is equal to a final velocity, what is the acceleration of the object?

Arlecino [84]

Answer:

The acceleration is 0.

Explanation:

The formula for acceleration is:

a = (v-u)/t

If v and u are equal, thus it would be 0 when subtracted, and anything divided by 0 is 0.

8 0

2 years ago

Two insulated wires, each 2.50 m long, are taped together to form a two-wire unit that is 2.50 m long. One wire carries a curren

liubo4ka [24]

Answer:

3.46 A

Explanation:

The force (F) exerted on a wire of a particular length (L) carrying current (I) through a magnetic field (B) at an angle (θ) to the magnetic field is given as

F = (B)(I)(L) sin θ

F = 3.13 N

B = 0.360 T

I = ?

L = 2.50 m

θ = 79°

3.13 = (0.360 × I × 2.5 × sin 79°)

0.8835 I = 3.13

I = 3.54 A

But this is the resultant current in this magnetic field.

Since the two wires are conducting current in opposite directions,

Resultant current = 7 - (current in the other wire)

Current in the other wire = 7 - 3.54 = 3.46 A

3 0

2 years ago

which theory of plate movements involves magma rising all the way from the lower mantle to spread apart plates

KatRina [158]

Hot plumes is the answer

6 0

2 years ago

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