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3 years ago

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What is the difference in average speed between a car that traveled 150 kilometers in 5 hours and another that traveled 130 kilo

meters in the same time? Just write the number.

1 answer:

Morgarella [4.7K]3 years ago

5 0

I think it’s 1,150 but if i’m wrong i’m sorry

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What sort of process converts the mechanized energy in the ocean into electricity?

allochka39001 [22]

I think it is the wave energy.
Wave energy also known as the ocean energy is the energy harnessed from the ocean or sea waves. It is a source of power that comes from the endless march of the waves as they roll into the shore then back out. Using wave energy is advantageous as they are environmental friendly as there are no harmful byproducts, and also the energy from waves can be taken directly into electricity-producing machinery and used to power generators.

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3 years ago

Question 1 of 10

Hoochie [10]

Answer:

The neutron is a subatomic particle, symbol

n

or

n0

, with no electric charge and a mass slightly greater than that of a proton. Protons and neutrons constitute the nuclei of atoms. Since protons and neutrons behave similarly within the nucleus, and each has a mass of approximately one atomic mass unit, they are both referred to as nucleons.[6] Their properties and interactions are described by nuclear physics.

Explanation:

pls mark me as BRAINLIEST

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3 years ago

a rod of zinc has a mass of 5kg. in water it weighs 25 N. what is the buoyant force on it when it is submerged in water?

Alexxandr [17]

Answer:

If it has a mass of 5 kg its weight is 5 kg * 9.8 m/s^2 = 49 N

Weight in air = 49 N

Weight in water = 25 N

Buoyant force provided by water = 49 - 25 = 24 N

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3 years ago

The mass and radius of Earth are____ME and____RE, respectively. The mass and radius of the Moon are approximately 186ME and 27RE

oksano4ka [1.4K]

Answer:

1. Mass of the Earth is 5.97219 × 10^24 kg

2. Radius of the Earth is 6,371 km

3. Acceleration due to gravity on the surface of the Earth is 9.81 m/s^2

4. Acceleration due to gravity on the surface of the moon is 1.625 m/s^2

Explanation:

The mass and radius of Earth are <u>5.97219 × 10^24 kg</u> ME and <u>6,371 km</u> RE, respectively. The mass and radius of the Moon are approximately 186ME and 27RE, respectively. The acceleration due to gravity on the surface of Earth is <u>9.81 m/s^2</u> . The acceleration due to gravity on the surface of the Moon is most nearly <u>1.625 m/s^2</u>

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3 years ago

A stone is thrown vertically upward with a speed of 15.0 m/s from the edge of a cliff 75.0 m high.How much later does it reach t

Katarina [22]

Answer:

5.72 seconds

848.27 m/s

97.94 m

Explanation:

t = Time taken

u = Initial velocity = 15 m/s

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

$v=u+at\\\Rightarrow 0=15-9.81\times t\\\Rightarrow \frac{-15}{-9.81}=t\\\Rightarrow t=1.52 \s$

Time taken to reach maximum height is 0.97 seconds

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=15\times 1.52+\frac{1}{2}\times -9.81\times 1.52^2\\\Rightarrow s=11.47\ m$

So, the stone would travel 11.47 m up

So, total height stone would fall is 75+11.47 = 86.47 m

Total distance travelled by the stone would be 75+11.47+11.47 = 97.94 m

$s=ut+\frac{1}{2}at^2\\\Rightarrow 86.47=0t+\frac{1}{2}\times 9.8\times t^2\\\Rightarrow t=\sqrt{\frac{86.47\times 2}{9.81}}\\\Rightarrow t=4.2\ s$

Time taken by the stone to travel 86.47 m to the water is is 4.2 seconds

The stone reaches the water after 4.2+1.52 = 5.72 seconds after throwing the stone

$v=u+at\\\Rightarrow v=0+9.81\times 86.47 = 848.27\ m/s$

Speed just before hitting the water is 848.27 m/s

3 0

3 years ago