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andriy [413]
3 years ago
10

When you throw a ball, the work you do to accelerate it equals the kinetic energy the ball gains. if you do twice as much work w

hen throwing the ball, does it go twice as fast? explain?
Physics
1 answer:
nata0808 [166]3 years ago
8 0
It doesn't because when u threw it the first time, u notice that the ball eventually came to a stop because of the force that was acting upon it. Although when u throw it harder it will start out faster than the first time u threw it because u put more kinetic energy onto the ball. But the same thing happens with this ball that happened to the second ball, they both have a type of force acting upon them.
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a business that sells products to teens would most likely create a website with a title ending in what suffix?
Nataliya [291]
I think you forgot to give the options along with your question. I am answering the question based on my knowledge and research. <span>A business that sells products to teens would most likely create a website with a title ending in .com. I hope that this is the answer that has actually come to your great help.</span>
3 0
2 years ago
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The speed of water flowing through a hose increases from 2.05 m/s to 31.4 m/s as it goes through the nozzle. What is the pressur
Nimfa-mama [501]

The pressure in the hose as the speed of water changes from 2.05 m/s to 31.4 m/s as it goes through the nozzle is 5.92 × 10⁵ N/m².

Given:

The flow of water through the hose initially, v₁ = 2.05 m/s

The flow of water through the hose initially, v₂ = 31.4 m/s

Calculation:

From Bernoulli's equation we have:

P₁ + 1/2 ρv₁² + ρgh₁ = P₂ + 1/2 ρv₂² + ρgh₂

where P₁ is atmospheric pressure

           P₂ is the pressure in the hose

           ρ is the density of the fluid

           h₁ is the initial height

           h₂ is the final height

           v₁ is the initial velocity of the fluid

           v₂ is the final velocity of the fluid  and

           g is the acceleration due to gravity

Re-arranging the above equation we get:

P₂ = P₁ + 1/2 ρ(v₁²-v₂²) + ρg (h₁-h₂)

Applying values in the above equation we get:

P₂ = P₁ + 1/2 ρ(v₁²-v₂²) + ρg (0)

    = (1.01 × 10⁵ Pa)+ 1/2 (10³ g/m³) [(31.4m/s)²-(2.05 m/s)²]

    = (1.01 × 10⁵ Pa)+ 1/2 (10³ g/m³) [981.7575]

    = (1.01 × 10⁵ Pa)+ (4.91 × 10⁵ Pa)

    = 5.92 × 10⁵ Pa

    = 5.92 × 10⁵ N/m²

Therefore, the pressure in the hose is 5.92 × 10⁵ N/m².

Learn more about Bernoulli's equation here:

<u>brainly.com/question/9506577</u>

#SPJ4

6 0
1 year ago
What two angles of elevation will enable a projectile to reach a target 15 km downrange on the same level as the gun if the​ pro
forsale [732]

Angle of projection: 28 degrees or 62 degrees

Explanation:

A projectile consists of two independent motions:

  • A uniform motion along the horizontal direction
  • A uniformly accelerated motion along the vertical direction

From the equations of motion, it is possible to derive an expression for the range of a projectile, which is:

d=\frac{u^2 sin(2\theta)}{g}

where:

u is the initial speed

\theta is the angle of projection

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

For the projectile in this problem, we have:

d = 15 km = 15,000 m is the range

u=421 m/s is the initial speed

Solving the equation for \theta, we find the possible angle:

sin (2\theta) = \frac{dg}{u^2}=\frac{(15,000)(9.8)}{(421)^2}=0.829

Which gives two values of the angle:

2\theta = 56^{\circ} \rightarrow \theta=28^{\circ}\\2\theta=124^{\circ} \rightarrow \theta=62^{\circ}

Learn more about projectile:

brainly.com/question/8751410

#LearnwithBrainly

4 0
3 years ago
In the pair of supply and demand equations below, where x represents the quantity demanded in units of a thousand and p the unit
motikmotik

Answer:

Equilibrium quantity = 5

Equilibrium price = 40

Explanation:

given:

p = -x²-3x+80

p = 7x+5

For the equilibrium quantity the price from both the functions will be equal

thus, we have

-x² - 3x + 80 = 7x+5

⇒ x² +3x + 7x + 5 - 80 = 0

⇒x² + 10x - 75 = 0

now solving for x

x²- 5x + 15x -75 = 0

x(x-5) + 15(x-5) = 0

therefore, the two roots of the equation are

x = 5 and x = -15

since the quantity cannot be in negative

therefore, the equilibrium quantity will be = 5

now the equilibrium price can be found out by substituting the equilibrium quantity in any of the equation

thus,

p = -(5)² -3(5) + 80 = 40

or

p = 7(5) + 5 = 40

3 0
2 years ago
Overnight temperatures are warmer when the air is humid because: water vapor is a good absorber of incoming shortwave radiation,
klemol [59]
I think: water vapor is a good absorber of outgoing longwave radiation. 
4 0
3 years ago
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