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3 years ago

ILL MARK BRAINLIEST

Physics

1 answer:

77julia77 [94]3 years ago

8 0

Answer: B

Longitudinal wave

Explanation:

Transverse waves have crests and troughs

Longitudinal waves have compressions and rarefactions. A compression is where the density of the wave medium is highest. While a rarefaction is where the density of the wave medium is lowest.

Since sound wave is a longitudinal wave. And longitudinal wave exists apart from sound, we can therefore conclude that it's a longitudinal wave in spring.

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Que es la energia electrica

Mnenie [13.5K]

Answer:

:) :) :) :) :) :) :) :) :)

Explanation:

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3 years ago

What is the set of processes used to encode, store, and retrieve information over different periods of time?

kakasveta [241]

The set of processes used to encode, store, and retrieve information over different periods of time is called memory. Memory makes us. If we couldn't recall the who, what, where, and when of our everyday lives, we would never be able to manage.

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4 years ago

Plzzzz urgent solve this

Mariana [72]

Answer:

$\large{ \tt{☄ \: EXPLANATION}} :$

Before solving , You'll have to know - When an object starts from the state of rest , in this case , initial velocity ( u ) = 0

Notice that we're provided the time ( t ) in minutes. So , first thing we have to do is convert the minutes into seconds. It would be - Time ( t ) = 5 minutes = 5 × 60 sec = 300 sec [ 1 min = 60 sec ]

Here , We're provided - Initial velocity ( u ) = 0 , Final velocity ( v ) = 60 m / s , Time taken ( t ) = 300 seconds & We're asked to find out the acceleration ( a ) & distance covered by the jeep ( s ) .

$\large{ \tt{♨ \:LET'S \: START}} :$

Acceleration is defined as the rate of change of velocity. We know :

$\large{ \boxed{ \tt{❁ \: ACCELERATION \: (a) = \frac{FINAL \: VELOCITY(v) - INITIAL \: VELOCITY(u)}{TIME \: TAKEN \: ( \: t \: )}}}}$

- Plug the values & then simplify !

$\large{ \bf{↬a = \frac{60 - 0}{300} = \frac{60}{300} = \boxed{ \bold{ \bf{0.2 \: m {s}^{ - 2} }}} }}$

The acceleration of the jeep is 0.2 m/s²

$\large{ \tt{۵ \: AGAIN, \: USING\: SECOND \: EQUATION \: OF \: MOTION}} :$

$\boxed{ \large{ \bf{✾ \: s = \frac{u + v}{2} \times t}}}$

- Plug the values & then simplify !

$\large{ \bf{↦s = \frac{0 + 60}{2} \times 300 = \boxed{ \bold{ \bf{9000 \: m}}}}}$

The distance covered by the jeep is 9000 m .

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7 0

3 years ago

Jake drags a sled of mass 25 kg across the snow. The sled is attached to a rope that pulls with a force of 50 N at an angle of 3

madam [21]

Answer:

218.5 N

Explanation:

In order for the sled to be in equilibrium along the vertical direction, the forces acting along this direction must be balanced. So the equilibrium equation is:

$N+F sin \theta - mg =0$

where

N is the normal force

F = 50 N is the force that pulls the sled

$\theta$ is the angle between the force and the horizontal, so

$F sin \theta$ is the component of F acting along the vertical direction

(mg) is the weight of the sled, with

m = 25 kg being the mass of the sled

g = 9.8 m/s^2 is the acceleration due to gravity

Solving the formula for N, we find

$N=mg-F sin \theta = (25 kg)(9.8 m/s^2)-(50 N)sin 32^{\circ}=218.5 N$

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3 years ago

Why the efficiency of carnot engine is not 100%

SVEN [57.7K]

Well, actually a heat engine using the Carnot cycle whose cold reservoir is maintained at 0 K could in principle be 100% efficient, even if the hot reservoir was merely at the ambient temperature. Since it costs no energy at all to maintain a heat reservoir at the ambient temperature as long as you have a perfect thermal connection to a large thermal capacitor like your swimming pool or a nearby aquifer you’d have built a perpetual motion machine.

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3 years ago