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Vilka [71]
3 years ago
8

Which has greater kinetic energy, a car traveling at 30 km/hr or a car of half the mass traveling at 60 km/hr?

Physics
2 answers:
Mumz [18]3 years ago
5 0
Half mass car because it's traveling faster

finlep [7]3 years ago
5 0

Answer:answer is twice as much

Explanation:

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You are in the lab and are given two rods set up so that the top rod is directly above the bottom one. The two straight rods 50-
kompoz [17]

Answer:

Explanation:

The magnetic force due to lower rod must be equal to weight of upper rod for equilibrium .

magnetic field due to lower rod on upper rod

= ( μ₀ / 4π ) x(2i / r ) , i is current , r is distance between rod

= 10⁻⁷ x 2 x 15 / 1.5 x 10⁻³

= 20 x 10⁻⁴ T

force on the upper rod

= B i L , B is magnetic field , i is current in second rod and L is its length

= 20 x 10⁻⁴ x 15 x .50

= 150 x 10⁻⁴ N

= .015 N

This force can balance a wire having weight equal to .015 N .

= .00153 kg

= 1.53 g .

wire should weigh 1.53 g .

3 0
4 years ago
Heating effect of current is not always useful for us. Support your answer with example<br>​
stellarik [79]

Answer:

is correct

Explanation:

in my think, first this due to ray emitted from the light those ray may be affect our skin or party of body.

4 0
3 years ago
What can you conclude about the pendulum at the instant shown by the graph below (just past 2 s)?
Semenov [28]
Below are the chocies 
A. The pendulum is at its highest point. 
<span>B. The pendulum is 0.9 m above its lowest point. </span>
<span>C. The pendulum is between its highest and lowest points. </span>
<span>D. The pendulum is at its lowest point. 
</span>
I think the answer is C.. 

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
7 0
4 years ago
The energy from the movement of electrons through the electron transport chain is directly used to synthesize atp.
baherus [9]

Answer:

False

Explanation:

This statement is false

3 0
3 years ago
A crate of eggs is located in the middle of the flatbed of a pickup truck as the truck negotiates a curve in the flat road. The
oksian1 [2.3K]

Answer:

v = 14.35 m/s

Explanation:

As we know that crate is placed on rough bed

so here when pickup will take a turn around a circle then in that case the friction force on the crate will provide the necessary centripetal force on the crate

So here we have

\mu mg = \frac{mv^2}{R}

here we have

\mu g = \frac{v^2}{R}

now we know that

v = \sqrt{\mu Rg}

here we have

\mu = 0.600

R = 35 m

g = 9.81 m/s/s

now plug in all values in above equation

v = \sqrt{(0.600)(35)(9.81)}

v = 14.35 m/s

4 0
3 years ago
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