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4 years ago

An instrument that can detect the presence of an electric charge is a

1 answer:

5 0

Electroscope is the instrument that has the ability to detect the presence of an electric charge. Although electroscope has the power to measure the amount of charge, but for a perfect measurement the electrometer is used. Around the year 1600, electroscope was discovered by William Gilbert he British physician. This is a pretty primitive but highly effective instrument in regards to detecting the presence of electric charges. Two basic but effective electroscopes are the gold-leaf electroscope and the pith-ball electroscope.

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The driver of a 1500 kg car, travelling on a highway, hits the brakes. A force of 12000 N stops the car in a distance of 64 m. h

nekit [7.7K]

Answer:

$v = 32 m/s$

Explanation:

As per work energy theorem we know that work done by all the forces must be equal to change in kinetic energy of the car

So here when brakes are applied then work is done by the brakes which is equal to change in kinetic energy of the car

so we know that work done by the brakes is given as

$W = -12000 \times 64$

$W = -768000 J$

now we will have

$W = 0 - \frac{1}{2}mv^2$

$-768000 = - \frac{1}{2}(1500) v^2$

$v = 32 m/s$

4 0

3 years ago

A jogger runs 5.0 km on a straight trail

meriva

Good for him ! If he's also adhering to a healthy diet, getting plenty of sleep, avoiding substance dependence, and minimizing his stress level, then he's doing everything he can to maximize his chances for a long, healthy, pleasant and rewarding fun life.

5 0

3 years ago

Which is a compound machine? a broom a screwdriver a slide a pair of scissors

8090 [49]

A pair of scissors .....................................

4 0

3 years ago

What factors that affect magnetic force

Reil [10]

Answer:

Strong electrical currents in close proximity to the magnet.

Other magnets in close proximity to the magnet.

Neo magnets will corrode in high humidity environments unless they have a protective coating.

Explanation: Heat radiation

7 0

3 years ago

Read 2 more answers

In the absence of air resistance, a ball is thrown vertically upward with a certain initial KE. When air resistane is a factor a

Ber [7]

Answer:

Explanation:

A ball is thrown vertically upward with a certain Kinetic Energy in the absence of air resistance and while returning it experiences air resistance.

Air resistance causes the ball to lose its kinetic energy as it provides resistance which will convert some of its kinetic energy to heat energy.

So in a way total energy is conserved but not kinetic energy as some portion of it is lost in the form of heat.

4 0

3 years ago