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KiRa [710]
3 years ago
11

How can you use energy conversation to predict the speed of the marble from the height?

Physics
1 answer:
Serga [27]3 years ago
3 0
I'm sorry for saying bla bla bla
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A car is traveling north at 17.7m/s After 12 s its velocity is 14.1m/s in the same direction. Find the magnitude and direction o
dem82 [27]

Answer:

Option B

0.3 m/s2 South

Explanation:

Acceleration, a=\frac {v-u}{t} where v and u are final and initial velocities respectively, t is the time taken

Substituting 14.1 m/s for v, 17.7 m/s for u and 12 s for t then

a=\frac {14.1 m/s- 17.7 m/s}{12}=-0.3 m/s^{2}

Since this is negative acceleration, it's direction is opposite hence 0.3 m/s2 South

7 0
3 years ago
Protons and neutrons both have positive charge, and electrons have negative charge. true or false
Kruka [31]

Answer:

False

Explanation:

Protons are positively charged, electrons are negatively charged, and neutrons have no charge.

7 0
3 years ago
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What should be changed to make the following sentence true? ""acrophobia is characterized by intense fear
Bess [88]

Answer:Agoraphobia

Explanation:

Acrophobia is a fear associated with heights i.e. fear of height

while Phobia characterized by intense fear is called Agoraphobia which is a anxiety disorder that can make you feel trapped so "Acrophobia" must be replace with "Agoraphobia" to make the sentence right.          

5 0
4 years ago
True or False question! ⬇⬇ Will give BRAINLIEST!
V125BC [204]

Answer:

Explanation:true

3 0
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Convert 4.5 hour into second​
KiRa [710]

Answer:

4.5 hours =

16200 seconds

Explanation:

here you go

6 0
3 years ago
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