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Georgia [21]
3 years ago
13

What is the potential energy of a 5kg rock that is 7m high on a hill

Physics
1 answer:
Goryan [66]3 years ago
4 0

Explanation:

Gravitational potential energy = mgh = (5)(9.81)(7) = 343.35J.

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A water bath in a physical chemistry lab is 1.55 m long, 0.710 m wide, and 0.570 m deep (high). If it is filled to within 3.55 i
Lesechka [4]

Answer:

528 liter.

Explanation:

Volume of the tank(cuboid) = l*b*h

But volume of the water = l*b*h

Where

l= length of the tank

b = width of the tank

h = the length from the bottom of the tank,

3.55 in to m,

0.09017m

Length of the water in the tank = 0.570 - 0.09017

= 0.47983 m.

Volume = 0.47983*0.710*1.55

= 0.528 m3.

1 m3 = 1000 liter.

0.528 m3 = 0.528*1000

= 528 liter

7 0
3 years ago
Sound travels Faster through _____________ mediums.
Maru [420]

Answer:

I know for sure that it's either A or B have a great day sorry I don't know which one completely

3 0
3 years ago
Read 2 more answers
A friend tells you that a lunar eclipse will take place the following week, and invites you to join him to observe the eclipse t
WARRIOR [948]

Answer:

y = 80.2 mille

Explanation:

The minimum size of an object that can be seen is determined by the diffraction phenomenon, if we use the Rayleigh criterion that establishes that two objects can be distinguished without the maximum diffraction of a body coincides with the minimum of the other body, therefore so much for the pupil of the eye that it is a circular opening

          θ = 1.22 λ/ d

in a normal eye the diameter of the pupils of d = 2 mm = 0.002 m, suppose the wavelength of maximum sensitivity of the eye λ = 550 nm = 550 10⁻⁹ m

         θ = 1.22 550 10⁻⁹ / 0.002

         θ = 3.355 10⁻⁴ rad

Let's use trigonometry to find the distance supported by this angle, the distance from the moon to the Earth is L = 238900 mille = 2.38900 10⁵ mi

       tan θ = y / L

       y = L tan θ

       y = 2,389 10⁵ tan 3,355 10⁻⁴

       y = 8.02 10¹ mi

       y = 80.2 mille

This is the smallest size of an object seen directly by the eye

5 0
3 years ago
Jamie had a solid, angular crystal and noticed that it was very hard to break. Which model could represent the crystal?
VLD [36.1K]

Answer:

d

Explanation:

5 0
3 years ago
What average force is required to stop a 980 kg car in 9.0 s if the car is traveling at 91 km/h ?
kozerog [31]
Newton's second law of motion:
F=ma
a =  \frac{v}{t}
You convert from km/h to m/s by dividing by 3.6:
v = 91 \div 3.6
v = 25.3 \:  \frac{m}{s}
Then a is:
a =  \frac{25.3}{9}
a = 2.8  \frac{m}{s {}^{2} }
Then:
F=(980)(2.8)=2744 N
5 0
3 years ago
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