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DedPeter [7]
2 years ago
7

Question 2

Physics
1 answer:
DaniilM [7]2 years ago
4 0

P=m.v

v=P/m

v=500/20

v=25 m/s

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Answer this question for brainlest and 20 points
noname [10]
I think is 3.5 pretty sure
4 0
3 years ago
Speedy Sue, driving at 32.0 m/s, enters a one-lane tunnel. She then observes a slow-moving van 170 m ahead traveling with veloci
yarga [219]

Answer:

10.89 seconds

229.895 m

Explanation:

Distance van travels

x_v=170+5.5t+\dfrac{1}{2}0t^2\\\Rightarrow x_v=170+5.5t

Position of car

x_c=0+32t+\dfrac{1}{2}-2t^2\\\Rightarrow x_c=32t-t^2

They are equal

170+5.5t=32t-t^2\\\Rightarrow 17+5.5t-32t+t^2\\\Rightarrow t^2-26.5t+170=0\\\Rightarrow 10t^2-265t+1700=0

t=\frac{-\left(-265\right)+\sqrt{\left(-265\right)^2-4\cdot \:10\cdot \:1700}}{2\cdot \:10}, \frac{-\left(-265\right)-\sqrt{\left(-265\right)^2-4\cdot \:10\cdot \:1700}}{2\cdot \:10}\\\Rightarrow t=15.6, 10.89\ s

The collision occurs at 10.89 seconds

x_v=170+5.5\times 10.89\\\Rightarrow x_v=229.895\ m

Collision occurs at 229.895 m from the starting point

5 0
3 years ago
Neurons conduct electrical signals along their axons in one direction. what structure do some neurons have that increases conduc
irina1246 [14]

The myelin sheath is the structure some neurons have that increases conduction speed.

<h3>What is a neuron?</h3>

Information is transmitted via neurons. They communicate between various brain regions and between the brain and the rest of the nervous system through electrical impulses and chemical signals.

As we know,

An insulating layer of fatty tissue called the myelin sheath surrounds the axon of a neuron and speeds up the electrical signal transmission.

Thus, the myelin sheath is the structure some neurons have that increases conduction speed.

Learn more about the neuron here:

brainly.com/question/24217914

#SPJ1

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1 year ago
1. A 24 kg rock is resting on the floor. How much potential energy does it have? Explain.
In-s [12.5K]
Relative to the floor its resting on, its height is zero, so it potential energy is zero.
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3 years ago
What is the distance of earths surface from the surface of sun
storchak [24]
Max: 152 million km
min 146 million km
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3 years ago
Read 2 more answers
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