1.78 km = __m
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Answer:

Hope it help you

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Explanation:

Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.

Option b

REAL NAME - SHRESTH DUBEY

Answer:

true

Explanation:

when  the heat rises the molecules inside vibrate much faster than when ever they cool down because they are slower, think of it as if you were frozen but could still move, you'd be slow but if you weren't and were warmer your system can work more and you can run faster than when you were frozen.

Answer:

the causes of season change on the earth is due to the tilted axis

Answer:

C

Explanation:

Answer:

0.40km/h

I think.. Hope this helps <3

Answer: 19kg•m/s east

Explanation:

The total momentum of the system after they collide will be equal to 19 kg m/s east. Hence, option A is correct.

The momentum is the result of a particle's velocity and its mass. Force and motion, meaning it has both magnitude and the direction. According to Isaac Newton's second equation of motion, the force acting on a particle equals the time rate of increase of momentum.

The impulse, which is the product of the force and the intervals (the impulse), is equal to the difference in momentum, according to Newton's 2nd law, if a steady force operates on a particle for a specific amount of time. On the other hand, a particle's momentum is the amount of time needed for a consistent action to fight it to rest.

As per the given information in the question,

Mass, m₁ = 65 kg

Mass, m₂ = 70 kg

Velocity, v₁ = 1.8 m/s

Velocity, v₂ = 1.4 m/s

Use the law of conservation of momentum,

P = m₁v₁ = m₂v₂

Here, P is the total momentum.

⇒ 65 × 1.8 = 78 × 1.4

= 117 east = 98 west

P = 117 - 98

P = 19 kg m/s east.

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Answer:

Explanation:

At first, you have to get the acceleration value from the given data.

[tex]s=ut+\frac{1}{2}at^{2}[/tex]

s= 45m

u= 0 m/s

t = 6s

a = ?

45 = 0+ 0.5 × a × 6²

45 = 0.5 × 36 × a

45 = 18a

a = 2.5 m/s²

Now, you can use F=ma equation

F = ?

m = 1200kg

a = 2.5 m/s²

F = 1200 × 2.5

F = 3000 N

Answer: D. Protons and neutrons

Explanation:  PLEASE GIVE BRAINLIEST IT HELPS ALOT

Answer:

A

Explanation:

wavelength can be obtained by speed of the wave divided by its frequency

[tex] \frac{343}{330} [/tex]

1.04m

Answer:

Correct answer - A) 1.04 m

Explanation: just did the quiz

Answer:

2kg

Explanation:

100N = Force 50m/s²= Acceleration

Mass=?

the equation is;

Mass(kg)= Force(N) ÷ Acceleration (m/s²)

100÷50=2

The answer is 200, 200 tennis balls would be in 8 bags if they each held 25.

Answer:

200 balls

Explanation:

Answer: Eridani B2 appears only [tex]6.73[/tex]×[tex]10^{-13}[/tex] as bright as the sun.

Answer:

Explanation:

a) work=Force times distance. given force is 888N and distance travelled is 22M

work= 888 x 22 = 19536J or 1.954x10^5J

b) work = 1111 x 22= 24442J or 2.444x10^5J

c) putting on a larger engine means that there are gonna be more force applied to the go cart. therefore the cart will travel the same distance faster

a. The amount of work done by the go cart engine is 19,536 Nm.

b. The amount of work done when a bigger engine is used is 24,442 Nm.

c. The reason why a bigger engine is used is, so that the engine can easily do more work in the same amount of distance.

Given the following data:

a. To determine the amount of work done by the go cart engine:

Mathematically, the work done by an object is given by the formula;

[tex]Work\;done = Force \times distance[/tex]

Substituting the given parameters into the formula, we have;

[tex]Work\;done = 888 \times 22[/tex]

Work done = 19,536 Nm.

b. To determine the amount of work done when a bigger engine is used:

[tex]Work\;done = Force \times distance[/tex]

[tex]Work\;done = 1111 \times 22[/tex]

Work done = 24,442 Nm.

c. The reason why a bigger engine is used is, so that the engine can easily do more work in the same amount of distance.

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Answer:

horizontal and vertical motion

Explanation:

By definition, a projectile has a single force that acts upon it - the force of gravity. If there were any other force acting upon an object, then that object would not be a projectile. Thus, the free-body diagram of a projectile would show a single force acting downwards and labeled force of gravity (or simply F^grav).

Answer:

Mass is the correct answer.

Explanation:

Many drivers report a more positive handling response and a definite improvement when reducing unsprung mass. You want to keep unsprung weight to as little as possible. This minimizes the momentum and energies that your suspension has to counter. In effect, it can make your shocks more sensitive.

Answer:

If you push hard, the block's bottom will move out from under its center of gravity and the block will tip over. The taller the block, the easier it is to push the bottom out from under the center of gravity. Keeping a car's center of gravity low is important to avoiding disaster during turns. But if you don't keep the car's center gravity low it will be inversely proportional and the acceleration can be damaged with force, and its mass could get disproportionate.

Explanation:

I'm sorry i tried my best. :/

Answer:

Explanation:

1). Distance traveled during the first minute (A-B)

    = Distance from A to C + Distance from C to D + Distance from D to B

    = 40 + 100 + 40

    = 180 m

   Option (4) will be the answer.

2). Displacement after first minute (A-B)

    = Distance from A to B

    = 180 m East

    Option (2) is the answer.

3). Distance traveled during the first 2 minutes (A - B - C)

    = Distance from A to B + Distance from B to C

    = 180 + 140

    = 320 m

    Option (3) will be the answer.

4). Displacement after first 2 minutes (A-B-C)

    = Distance between A and C

    = 40 m towards east

    Option (1) is the answer.

5). Distance traveled during 3 minutes (A-B-C-D)

    = Distance between A to B + Distance between B to C + Distance between C to D

    = 180 + 140 + 100

    = 420 m

   Option (4) is the answer.

6). Displacement after total 3 minutes (A-B-C-D)

    = Distance between A and D

    = Distance between A to C + distance between C to D

    = 40 + 100

    = 140 m

     And the direction is towards East.

     Option (3) is the answer.

Answer:

The final displacement from the origin is 1.6 km to the NE

Explanation:

The directions in which the delivery truck travels are;

1) 2.8 km North = 2.8·[tex]\hat j[/tex], in vector form

2) 1.0 km East = 1.0·[tex]\hat i[/tex], in vector form

3) 1.6 km South = -1.6·[tex]\hat j[/tex], in vector form

Therefore, to find the final displacement, Δx, of the delivery truck, we add the individual displacements as follows;

Final displacement, Δd = 2.8·[tex]\hat j[/tex] + 1.0·[tex]\hat i[/tex] +(-1.6·[tex]\hat j[/tex]) = 1.2·[tex]\hat j[/tex] + 1.0·[tex]\hat i[/tex]

Final displacement, = 1.0·[tex]\hat i[/tex] + 1.2·[tex]\hat j[/tex]

Where;

Δx = The displacement in the x-direction = 1.0·[tex]\hat i[/tex]

Δy = The displacement in the y-direction = 1.2·[tex]\hat j[/tex]

The magnitude of the resultant displacement vector is given as follows

[tex]\left | d \right |[/tex] = √((Δx)² + (Δy)²) = √(1² + 1.2²) ≈ 1.6 (To the nearest tenth)

The magnitude of the resultant displacement vector ≈ 1.6 km

The direction of the resultant vector is positive for both the east and north direction, therefore, the direction of the resultant vector = NE

Therefore, the resultant displacement of the delivery truck is approximately 1.6 km, NE from the origin.

Answer:

A human

Explanation:

An elephant weighs more, therefore it's gravitational pull by Earth impacts it more than a human.

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Answer:

Explanation:

Think of it this way: An elephant has more inertia than a human. It is much harder to push an elephant across a floor than it is a human, and much harder to stop the elephant once it is moving. Therefore, by definition, an elephant has more mass than a human.

Answer:

Explanation:

average speed = 90 km / hr

Let the total distance be 2 d .

time required to cover the time = 2 d / 90

time taken   to cover distance d at 50 km /h = d / 50

time required to cover the  nd half = 2 d / 90 -  d / 50

.02222 d  - .02 d = .002222 d

speed required = d/2 / .002222d

1 / 2 x .002222

= 225 km /h .

Answer:

it is the same substance because it didn't change the process of that it was it just changed its state for would to liquid

Answer:

north of 66.5 degrees latitude;90 degrees minus and filt of earth axis receive 24 hrs of sunlight

Answer:

42 hour

Explanation:

It is given that,

Speed of a car, v = 40 mph

Distance covered by the car, d = 1680 miles

We need to find the time taken by the car to cover this distance. We can find it using the formula of speed which is equal to the distance covered divided by the time taken. Let the time is t.

speed = distance/time taken

[tex]t=\dfrac{d}{s}\\\\t=\dfrac{1680\ \text{miles}}{40\ \text{mph}}\\\\t=42\ \text{hour}[/tex]

Hence, the car will take 42 hours to cover 1680 miles with a speed of 40 mph.

Answer:

a. 42.92 m/s b 4.4 s c. 915.2 m

Explanation:

Here is the complete question

A volcano erupts, and a chunk of hot magma is launched horizontally with a speed of  ​ 208 m/s, from a height of 94 m. We can ignore air resistance.

What is the vertical velocity of the magma when it hits the ground?

Solution

a. Using v² = u² - 2gy since it is motion under gravity, where u = initial vertical velocity = 0 m/s, g = acceleration due to gravity = -9.8 m/s² and y =  height = 94 m.

Substituting these values into the equation, we have

v² = u² - 2gy

v² = 0² - 2 × (-9.8 m/s²) × 94 m

v² = 1842.4 m²/s²

v = √1842.4 m²/s²

v = 42.92 m/s

b. We also find the time it takes to drop from the height of 94 m from

y = ut - 1/2gt² , u = 0

So, t = √(2y/g)

= √(2 × 94 m ÷ 9.8 m/s²)

= √19.184 s²

= 4.4 s

c. The horizontal distance the chunk of hot magma covers is thus x = Vt where v = horizontal velocity = 208 m/s

x = 208 m/s × 4.4 s = 915.2 m

Answer:

that's wrong its 911

Explanation:

trust me

Answer:

Wavelength

Explanation:

The distance between two crests or two troughs on a transverse wave is known as the wavelength.

The wavelength of a periodic wave is its spatial period or the distance over which the wave's structure repeats. It's the distance between two adjacent corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero-crossings, and it's a feature of both travelling and standing waves, as well as other spatial wave patterns.

As discussed above the wavelength, therefore, the distance between two crests or two troughs on a transverse wave is known as the wavelength.

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Answer: I hope you have a great day. And I hope this helps.

Explanation: Scientific ideas don't need to be resourced in a book: For example, they need to be published in a peer-reviewed journal.

Furthermore, public favoring is not material: global warming is accepted in the scientific community despite a lack of popular favoring.

The correct answer is: They are new ideas. (and once they're accepted they can become laws).

Answer: -49m/s.

Explanation:

As the rock only falls, we will assume that the initial vertical velocity is zero.

We neglect the air friction, so the only force acting on the rock is the gravitational force, this means that the acceleration is -g = -9.8m/s^2.

Then we can write:

a(t) = -9.8m/s^2

To write the velocity of the rock, we must ingrate over time and get:

v(t) = (-9.8m/s^2)*t + v0

where v0 is the initial vertical velocity, and as we said above, v0 = 0m/s

Then the vertical velocity as a function of time is:

v(t) = (-9.8m/s^2)*t

Now, the question is:

"...If a rock falls for 5 seconds near the surface of the earth and with no air friction, it will reach a velocity of..."

Then we need to evaluate the velocity equation in t = 5 seconds.

v(5s) = (-9.8m/s^2)*5s = -49m/s.

The Answer is particle Z

Answer:

answer is D

Explanation:

Answer:

Explanation:

In free fall, gravity constantly accelerates an object (increases its velocity)—until it hits terminal velocity. Specifically, gravity increases a falling object's velocity by 9.8 meters per second (m/s) with every passing second. (Whereas velocity is measured in m/s, acceleration is measured in meters per second squared, or m/s2.) How does this constant acceleration affect the distance that an object travels over time? In this experiment you will roll a marble down a ramp to find out.

By adjusting the ramp's height, width, or inclination, you can increase the velocity at which the marble travels down it.

As a tool for lifting or lowering a load, an inclined plane, sometimes referred to as a ramp, is a flat supporting surface that is tilted at an angle from the vertical direction with one end higher than the other.

One of the six traditional simple devices that Renaissance scientists defined is the inclined plane. Heavy weights are transported over vertical obstacles using inclined planes. Examples include a ramp used to load cargo into a truck, a pedestrian ascending a ramp, or an automobile or train ascending an incline.

Less force is needed to push an object up an inclined plane than to lift it straight up, but the distance travelled is greater.

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Answer:

Before stopping, the van travels 42.5 m

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

[tex]v_f=v_o+at\qquad\qquad [1][/tex]

The distance traveled by the object is given by:

[tex]\displaystyle x=v_o.t+\frac{a.t^2}{2}\qquad\qquad [2][/tex]

The van slows down uniformly from v0=17 m/s to vf=0 m/s in t=5 s. The acceleration can be calculated by solving [1] for a:

[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]

[tex]\displaystyle a=\frac{0-17}{5}=-3.4\ m/s^2[/tex]

The distance covered is:

[tex]\displaystyle x=17\cdot 5+\frac{(-3.4)\cdot 5^2}{2}[/tex]

[tex]\displaystyle x=85-42.5=42.5[/tex]

Before stopping, the van travels 42.5 m

Answer:Explanation:

Image result for what does a worm and wheel mechanism do to torque and speed​

Like other gear arrangements, a worm drive can reduce rotational speed or transmit higher torque. ... Each full 360 degree turn of a single start worm advances the gear by one tooth. For a multi start worm the gear reduction equals the number of teeth on the gear divided by the number of starts on the worm.