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3 years ago

Which energy source for electricity would cause the least damage to the planet?

Physics

2 answers:

Temka [501]3 years ago

8 0

Answer:

Solar Energy .

Explanation:

We widely use 2 kinds of sources of energy . Coal and Nuclear . on burning coal we get carbon monoxide , which can kill a vast majority of peope . Also coal contains sulfur and other elements, including dangerous metals such as mercury, lead, and arsenic, that escape into the air when coal is burned.

Nuclear energy produces radioactive waste. nuclear power creation causes lots of damge to our envirnment .The radio active waste remains active and are harmful for living being health.

While on the other hand solar energy though comes expensive , but trust me ! its worth using it .Its absolutely fine if we spend lots of money and save even 1 person's life . Its a renewable source , and we can invest the money by saving utility bills .

ikadub [295]3 years ago

3 0

Answer:

Solar panels

Explanation:

Not given answer choices, but this is efficient as energy is taken from the sun.

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A net force acting on a 5.0 kg box produces an acceleration of 4.2 m/s2. What acceleration, to the nearest tenth of a m/s2, will

SCORPION-xisa [38]

The acceleration that the net force will cause is 7.5 m/s²

To solve this problem, first, we need to find the net force.

⇒ Equation:

F = ma................ Equation 1

⇒ Where:

m = mass of the box
a = acceleration of the box

From the question,

⇒ Given;

m = 5.0 kg
a = 4.2 m/s²

⇒ Substitute these values into equation 1

F = 5×4.2
F = 21 N

We also use the same equation 1 to find the acceleration that the net force will cause to a box of mass 2.8 kg.

⇒ make a the subject in equation 1

a = F/m................. Equation 2

⇒ Substitute the appropriate values into equation 2

a = 21/2.8
a = 7.5 m/s²

Hence, The acceleration that the net force will cause is 7.5 m/s²

Learn more about acceleration here: brainly.com/question/605631

4 0

3 years ago

A flap of tissue that prevents blood from flowing back is a(n)________ .

ioda

A valve is a flap of tissue that prevents blood from flowing back

6 0

3 years ago

A 0.600 kg block is attached to a spring with spring constant 15 N/m. While the block is sitting at rest, a student hits it with

gulaghasi [49]

Answer:

8.8 cm

31.422 cm/s

Explanation:

m = Mass of block = 0.6 kg

k = Spring constant = 15 N/m

x = Compression of spring

v = Velocity of block

A = Amplitude

As the energy of the system is conserved we have

$\dfrac{1}{2}mv^2=\dfrac{1}{2}kA^2\\\Rightarrow A=\sqrt{\dfrac{mv^2}{k}}\\\Rightarrow A=\sqrt{\dfrac{0.6\times 0.44^2}{15}}\\\Rightarrow A=0.088\ m\\\Rightarrow A=8.8\ cm$

Amplitude of the oscillations is 8.8 cm

At x = 0.7 A

Again, as the energy of the system is conserved we have

$\dfrac{1}{2}kA^2=\dfrac{1}{2}mv^2+\dfrac{1}{2}kx^2\\\Rightarrow v=\sqrt{\dfrac{k(A^2-x^2)}{m}}\\\Rightarrow v=\sqrt{\dfrac{15(0.088^2-(0.7\times 0.088)^2)}{0.6}}\\\Rightarrow v=0.31422\ m/s$

The block's speed is 31.422 cm/s

4 0

3 years ago

If state troopers were instructed to write a ticket for any motorist going 1 mph over the speed limit, one could argue that this

elena-s [515]

Answer:

Legalistic

Explanation:

Legalistic style of policing is a part of operational procedures that involves total enforcement of law to the letter with a minimal use of force but already stipulated law and consequence for a particular offence. For instance if a driver is caught going over the speed limit a ticket is issued immediately based on the law

6 0

4 years ago

cho hệ cơ học như hình vẽ hai đầu dây buộc hai vật có khối lượng tương ứng là m1=2kg và m2>m1 lấy g=10m/s sau 1s kể từ lúc bắ

Sever21 [200]

xin lỗi không có sơ đồ vui lòng cho biết sơ đồ

7 0

3 years ago