3 years ago

Are all magnetic fields created with electricity

Physics

1 answer:

Natasha_Volkova [10]3 years ago

3 0

No not all, because not all electrical field attract and repel

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If you hold your hand over a pot of boiling water, it feels hot. Explain how the boiling water is transferring heat to your hand

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What is the route number for ( 697 and 129 )

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I threw a plastic ball in the pool for my dog to fetch. The mass of the ball was 125g. What must the volume be to have a density

Stells [14]

Answer:

250 mL

Explanation:

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D = density

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3 years ago

A car whose total mass is 800kg travelling with a uniform velocity of 20m/s suddenly observes a stationary dog on it's path 50m

Gelneren [198K]

Answer:

Driver hits the dog

Explanation:

From kinematics equation

$v_f^{2}=v_i^{2}+2as$ and making a the subject

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F=ma=800*-4=-3200 N

The driver is required to apply a force of 3200 N to effectively not hit the dog. However, when the driver applies 2000 N, this is less the required force by 1200 N hence the driver hits the dog.

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3 years ago

After a day of testing race cars, you decide to take your own 1550 kg car onto the test track. While moving down the track at 10

quester [9]

Answer:

F = 2325 N

Explanation:

given,

mass of the car, m = 1550 Kg

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time, t = 10 s

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a = 1.5 m/s²

we know

F = m a

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F = 2325 N

Net average force applied on the car is equal to 2325 N.

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