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2 years ago

WILL MARK BRAINLIEST ONCE I KNOW THE RIGHT ANSWER (AFTER THE FULL TEST)

Physics

1 answer:

postnew [5]2 years ago

5 0

B you will see the objective outside the vehicle not moving will’l you are moveing inside the vehicle

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A batter hits a 0.140-kg baseball that was approaching him at 19.5 m/s and, as a result, the ball leaves the bat at 44.8 m/s in

Arada [10]

Answer:

5295.3 N

Explanation:

According to law of momentum conservation, the change in momentum of the ball shall be from the momentum generated by the batter force

mv + P = mV

P = mV - mv = m(V - v)

Since the velocity of the ball before and after is in opposite direction, one of them is negative

P = 0.14(44.8 - (-19.5)) = 9 kg m/s

Hence the force exerted to generate such momentum within 1.7ms (0.0017s) is

F = P/t = 9/0.0017 = 5295.3 N

4 0

2 years ago

A 50-cm3 block of wood is floating on water, and a 50-cm3 chunk of iron is totally submerged in the water. Which one has the gre

ludmilkaskok [199]

Answer:

Iron

Explanation:

The buoyant force equals to the weight of water being displaced by the object.

Since, the volume of both iron and wood is equal and the wood is not completely submerged, but the iron block is completely submerged i.e more volume of the water is being displaced by the iron block.

Hence, the buoyant force is more on the iron.

4 0

3 years ago

Which diagram shows the resulting wave when they cross at point X?

zvonat [6]

The resulting wave will have zero amplitude, thus it will form a straight line.

<h3>What is a crest?</h3>

A crest is an upward displacement of a progressive wave.

<h3>What is a trough?</h3>

A trough is a downward displacement of a progressive wave.

<h3>Superimposition of the two waves</h3>

When the two waves meet each other at point X, they will superimpose and cancel out since they have equal amplitude and are in opposite direction.

The resulting wave will have zero amplitude, thus it will form a straight line.

Learn more about crest here: brainly.com/question/1430231

#SPJ1

5 0

1 year ago

The heat flux for a given wall is in the x-direction and given as q^n = 11 W/m^2, the walls thermal conductivity is 1.7 W/mK and

MrMuchimi

Answer:

$\frac{dT}{dx} = 6.47 ^oC/m$

Also as we can see the equation that heat flux directly depends on the temperature gradient so more is the temperature gradient then more will be the heat flux.

For positive temperature gradient the heat will flow outwards while for negative temperature gradient the heat will flow inwards

Explanation:

As we know that heat flux is given by the formula

$q^n = K\frac{dT}{dx}$

here we know that

K = thermal conductivity

$\frac{dT}{dx}$ = temperature gradient

now we know that

$q^n = 11 W/m^2$

also we know that

K = 1.7 W/mK

now we have

$11 = 1.7 \frac{dT}{dx}$

so temperature gradient is given as

$\frac{dT}{dx} = \frac{11}{1.7} = 6.47 K/m$

also in other unit it will be same

$\frac{dT}{dx} = 6.47 ^oC/m$

Also as we can see the equation that heat flux directly depends on the temperature gradient so more is the temperature gradient then more will be the heat flux.

For positive temperature gradient the heat will flow outwards while for negative temperature gradient the heat will flow inwards

5 0

2 years ago

D. Fill in the blanks in the following paragraph to correctly identify the conductive properties of materials. (1 point)

Salsk061 [2.6K]

Answer:

conductor, insulator, resists, semiconductor, 3 and 5 group

Explanation:

4 0

2 years ago

WILL MARK BRAINLIEST ONCE I KNOW THE RIGHT ANSWER *(AFTER THE FULL TEST)*

WILL MARK BRAINLIEST ONCE I KNOW THE RIGHT ANSWER (AFTER THE FULL TEST)