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Gala2k [10]
4 years ago
14

A water slide is constructed so that swimmers, starting from rest at the top of the slide, leave the end of the slide traveling

horizontally. As the drawing shows, one person hits the water 5.00 m from the end of the slide in a time of 0.270 s after leaving the slide. Ignore friction and air resistance, find the height H in the drawing.
Physics
1 answer:
solniwko [45]4 years ago
8 0

Answer:

17.86 m

Explanation:

The first step is to find the velocity of the swimmer.

Velocity, v = s/t

Velocity, v = 5 / 0.27

Velocity, v = 18.52 m/s

Then, we find the height

h = ½gt²

h = ½ * 9.8 * 0.27²

h = 4.9 * 0.0729

h = 0.36 m

Next, we apply the law of conservation of energy

mgH = mgh + ½ mv²

9.8Hm = m(9.8 * 0.36 + 0.5 * 18.52²)

9.8H = 3.528 + 171.4952

9.8H = 175.02

H = 175.02 / 9.8

H = 17.86 m

Therefore, the needed height is 17.86 m

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At what distance is the electrostatic force between two protons equal to the weight of one?.
erik [133]

0.118 m is the distance between the two protons.

Mass of proton = 1.6726 × 10⁻²⁷ kg

Weight of proton= 1.6726 × 10⁻²⁷ x 9.81 N

                            = 1.6408 × 10⁻²⁶ N

Charge of proton = 1.602 × 10⁻²⁹ C

The force between two protons = kq²/r²     where, K is a proportionality    

                                                            constant, q is a charge of proton and  

                                                         r is the distance between two protons.          

                                                       = 9 × 10⁹ × (1.602×10⁻¹⁹)²/r²      

To calculate distance :

  Weight of proton= Force between protons

 ⇒   1.6408 × 10⁻²⁶ N = 9 × 10⁹ × (1.602×10⁻¹⁹)²/r²

 ⇒    r = 0.118m

Therefore, 0.118 m is the distance between the two protons.

Learn more about electrostatic force here:

brainly.com/question/18108470

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8 0
2 years ago
A 12 v automobile battery is connected to an electric starter motor. the current through the motor is 206
vampirchik [111]
Power = (voltage) x (current). The motor consumes (12)x(206)=2,472 watts. Some of it is dissipated as heat, but most of it is used to do useful work by turning the engine over to make it start.
5 0
3 years ago
Who won the Battle of Barren Hill?
Serga [27]
The british won the Battle of Barren Hill :)
5 0
3 years ago
Two train 75 km apart approach each other on parallel tracks, each moving at
creativ13 [48]

Answer:

The correct solution is "37.5 km".

Explanation:

Given:

Distance between the trains,  

d = 75 km

Speed of each train,

= 15 km/h

The relative speed will be:

= 15 + (-15)

= 30 \ km/h

The speed of the bird,

V = 15 km/h

Now,

The time taken to meet will be:

t=\frac{Distance}{Relative \ speed}

  =\frac{75}{30}

  =2.5 \ h

hence,

The distance travelled by the bird in 2.5 h will be:

⇒ D = V t

        =15\times 2.5

        =37.5 \ km

 

6 0
3 years ago
What is the refractive index of the plastic?
Katena32 [7]

Most plastics have refractive indices in the range from 1.3 to 1.7, but some high-refractive-index polymers can have values as high as 1.76. For infrared light refractive indices can be considerably higher. Germanium is transparent in the wavelength region from 2 to 14 µm and has a refractive index of about 4.

8 0
4 years ago
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