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pav-90 [236]
3 years ago
14

Suppose an elephant has a mass of 2800 kg. show answer No Attempt How fast, in meters per second, does the elephant need to move

to have the same kinetic energy as a 77-kg sprinter running at 8.5 m/s
Physics
1 answer:
Mumz [18]3 years ago
7 0

Answer:

The speed of elephant must be 1.4 m/s.

Explanation:

Mass of the elephant, M = 2800 kg

Mass of sprinter, m = 77 kg

Speed of sprinter, v = 8.5 m/s

It is required to find the speed of elephant to have the same kinetic energy as that of sprinter. So,

K_e=K_s\\\\\dfrac{1}{2}MV^2=\dfrac{1}{2}mv^2\\\\MV^2=mv^2\\\\V=\sqrt{\dfrac{mv^2}{M}} \\\\V=\sqrt{\dfrac{77\times 8.5^2}{2800}} \\\\V=1.40\ m/s

So, the speed of elephant must be 1.4 m/s.

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_____reaches the Earth’s surface through ______, then turns into ______.
VikaD [51]

Answer:

D

Explanation:

magma comes up from the core and comes out through volcanoes and then is turned into lava.

4 0
3 years ago
Problema 1. Un Clavadista se lanza desde un trampolín a diferentes alturas 10 m, 3 m, y 1 m, Calcular:
Salsk061 [2.6K]

La velocidad del buzo es de 7.04 m/s, 8.84 m/s y 2.27 m/s respectivamente.

<h3 /><h3>Velocidad </h3>

La velocidad es la relación entre la distancia total recorrida y el tiempo total empleado. Está dado por:

Velocidad = distancia/tiempo

Para 10m de altura:

  • Velocidad = 10 m/1.42 s = 7.04 m/s

Para 3m de altura:

  • Velocidad = 3 m/0.78 s = 3.84 m/s

Para 1m de altura:

  • Velocidad = 1 m/0.44 s = 2.27 m/s

La velocidad del buzo es de 7.04 m/s, 8.84 m/s y 2.27 m/s respectivamente.

Obtenga más información sobre la velocidad en: brainly.com/question/4931057

4 0
3 years ago
The volume of a cube is 512 cm3. What would change if the volume of the cube were measured in cubic meters?. . A.. The volume of
Black_prince [1.1K]
We are given with a volume of a cube equal to 512 cm3. In this case, when the volume is expressed to cubic meters, the volume will still stay the same but the number of cubic units would decrease. a centimeter is a smaller unit than a meter, hence the value given should be divided by 1 million to express to m3.
6 0
4 years ago
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Compare and contrast scientific theory and scientific law
grandymaker [24]

Answer:

Similarities:

  • Both are based on observation.
  • Both are supported by empirical data
  • Both are tested repeatedly
  • Both are accepted by science
  • Both are based on natural phenomena

Differences:

  • Scientific law just describes a phenomenon. It does not give an explanation as to why the phenomenon occurs. It predicts an outcome of an event based on its initial condition.
  • Scientific theory gives an explanation as to why an event had occurred.
  • Laws are more resistant to change.
  • Theories can be refuted and accepted, and develop other theories as well

Take note:

A scientific theory cannot be "upgraded" into a law, and a scientific law cannot be changed into a theory.

8 0
4 years ago
A thin slice of silicon that contains many solid-state components is a(an)
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It's an intrigated circuit
8 0
3 years ago
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