All categories

3 years ago

What does fossil fuels do?

2 answers:

8 0

Fossil fuel are collected and turned into oils like car gas and many other products have fossil fuels in them and we don't even realize it idk oil was made out of fossils till i studied fossils in class Hope this helps:)

scoray [572]3 years ago

7 0

Fossil fuels are collected to be turned into sevral things like car oil

You might be interested in

Joaquin has hockey practice at the same ice rink where Alton has curling practice. One day, they were both playing on the ice wi

joja [24]

the puck recoils in each case.

larger mass stone gives puck greater recoil, smaller stone, smaller recoil

8 0

3 years ago

Read 2 more answers

A 62 kg skier is moving at 6.5 m/s on frictionless horizontal snow-covered plateau when she encounters a rough patch 3.50 m long

Degger [83]

Answer:

(A). The work done by friction in crossing the patch is -637.98 J.

(B). The speed of skier is 10.57 m/s.

Explanation:

Given that,

Mass of skier = 62 kg

Speed = 6.5 m/s

Length = 3.50 m

Coefficient kinetic friction = 0.30

Height = 2.5 m

(A) we need to calculate the work done by friction in crossing the patch

Using formula of work done

$W=-\mu mg\times l$

Put the value into the formula

$W=-0.30\times62\times9.8\times3.50$

$W=-637.98\ J$

The work done by friction in crossing the patch is -637.98 J.

(B) we need to calculate the speed of skier

Using conservation of energy

$K.E_{i}+U_{i}-W_{friction}=K.E_{f}+U_{f}$

$\dfrac{1}{2}mv_{1}^2+mgh-\mu mgl=\dfrac{1}{2}mv_{2}^2+U_{f}$

Final potential energy is zero

So, $\dfrac{1}{2}mv_{1}^2+mgh-\mu mgl=\dfrac{1}{2}mv_{2}^2$

$\dfrac{1}{2}v_{2}^2=\dfrac{1}{2}v_{1}^2+gh-\mu gl$

Put the value into the formula

$\dfrac{1}{2}v_{2}^2=\dfrac{1}{2}\times6.5^2+9.8\times2.5+0.30\times9.8\times3.50$

$v_{2}=\sqrt{2\times55.915}$

$v_{2}=10.57\ m/s$

The speed of skier is 10.57 m/s.

Hence, (A).The work done by friction in crossing the patch is -637.98 J.

(B).The speed of skier is 10.57 m/s.

6 0

3 years ago

What is the gravitational force on a 35.0 kg object standing on the Earth's surface?

kari74 [83]

F=mg
F=35*9.81
F=343.35N

4 0

3 years ago

Please answer all of these questions and you will get the brain list

pogonyaev

Answer:

1=900j

2=140j

3=5m

Explanation:

work=force×displacement

w=450×2

w=900j

w=f×s

w=70×2

w=140j

w=f×s

200=40×s

200/40=s

s=5m

6 0

3 years ago

Which image shows the difference between the speed of molecules in hot and cold water? Explain your answer choice.

Leto [7]

There is no image btw

7 0

3 years ago

Read 2 more answers