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katen-ka-za [31]
3 years ago
6

Our surrounding of the atom has changed over time which idea that once accepted is now considered scientifically inaccurate (A.

Electrons have a negative charge. (B. An atom is a solid sphere (C. Electrons are arranged in layers (D. The nucleus is the center of the atom
Physics
1 answer:
MrRa [10]3 years ago
3 0

An atom is a solid metal is the answer hope this help

malory your fellow user

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A lead ball is dropped into a lake from a diving board 16.0 ft above the water. It hits the water with a certain velocity and th
BlackZzzverrR [31]

Answer:

138.46 ft

Explanation:

When the ball is dropped until the moment it hits the water, the ball moves in a uniform acceleration motion. Therefore, the equation that describes the movement of the ball is:

X = \frac{1}{2}*g*t^{2}  + V_{0} *t + x_0

Where X is the distance that the ball has fallen at a time t. V_0 is the initial velocity, which is 0 ft/s as the ball was simply dropped. x_0 is the initial position, we will say that this value is 0 in the position where the ball was dropped for simplicity, and it increases as the ball is falling. Now, we replace x with 16 feets and solves for t:

16 ft = \frac{1}{2} * 32.2 \frac{ft}{s^{2}} *t^{2} +0 \frac{ft}{s} * t + 0 ft

t = \sqrt{2* \frac{16 ft}{32.2 \frac{ft}{s^2}}} = 1 s

The velocity that the ball will have at the moment the ball that the ball hits the water will be:

V = V_o+g*t=0\frac{ft}{s}+32.2\frac{ft}{s^2}*1s =32.2\frac{ft}{s}

The time that will take the ball to reach the bottom from the top of the lake will be t = 5.3s - 1s = 4.3s. And as the ball will travel with constant velocity equal to 32.2 ft/s^2, the depth of the lake will be:

d = v*t = 32.2\frac{ft}{s}  * 4.3s = 138.46 ft

4 0
3 years ago
rank the reservoirs of freshwater on earth by volume, with that containing the highest volume on top.
lukranit [14]

The freshwater reservoirs on earth are ranked by volume, with the one with the biggest volume at the top is-

1. ice caps; 2. groundwater; 3. lakes; 4. rivers.

<h3>Explain the freshwater reservoirs on earth?</h3>

The atmosphere, the earth's surface, and the earth's interior are the three main locations where water can be kept.

  • Oceans, glacier ice, underground, lakes, soil humidity, living organisms, atmospheric atmosphere, and rivers are examples of these reservoirs, which are used to store water.
  • There is an estimated 1.386 billion km3 (330 million cubic miles) of water on Earth, of which 97.5% is salt water and 2.5% is fresh water.
  • Only 0.3% of a fresh water is liquid at the surface.
  • More than 70% of freshwater is utilized for agriculture in the majority of the world's areas.
  • An estimated 50% increase in agricultural output and a 15% increase in water flows are needed by 2050 to feed a globe of 9 billion people.

Thus, the freshwater reservoirs on earth are ranked by volume, with the one with the biggest volume at the top is-

  • 1. ice caps
  • 2. groundwater
  • 3. lakes
  • 4. rivers

To know more about the freshwater reservoirs, here

brainly.com/question/1784660

#SPJ4

7 0
1 year ago
If forced air furnace heats a house until all the air is the same temperature as the air coming from the furnace then
kramer

There's a normal amount of condensation when a AC is running. If it's dripping on the floor, look for the white PVC pipe that is supposed to be there to drain it. If it's coming from inside the unit, call a repair person.

8 0
3 years ago
An overhead electric power line carries a maximum current of 125 A. What is the magnitude of the maximum magnetic field at a poi
BARSIC [14]

Answer:

B= 55.6×10^(-7) Tesla

Explanation:

B= μoI/(2πr)

B:  magnetic field strength

μo: permeability of free space and is equal to  4π×10^(-7) T.m/A

r: distance from the wire

I : current in the wire

B= (4π×10^(-7)×125)/(2π×4.5)

B= 55.6×10^(-7) Tesla

3 0
4 years ago
20 POINTS!
CaHeK987 [17]
Potential energy is the answer
6 0
4 years ago
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