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3 years ago

8

An automobile with a mass of 1165 kg accelerates at a rate of 5 m/s² in the forward direction. What is the net force acting on t

he automobile? N

1 answer:

Natalka [10]3 years ago

6 0

Ignore the displacement formula

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What is letaral inversion?

Korolek [52]

Answer:

Images that are not aligned are laterally inverted

Explanation:

When a plane mirror reverses an image so that it becomes upside down and downside up or the other way round, we say that the image is laterally inverted.

Hence the effect produced when a plane mirror reverses an image is called lateral inversion

A good example of lateral inversion ins the lettering of an ambulance

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3 years ago

How many days for the moon to make a complete circuit around the Earth?<br>

Andru [333]

Answer:

It takes the Moon 27.3 days to complete a single orbit around Earth.

Explanation:

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2 years ago

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According to Einstein’s theory of relativity, how can energy be created?

9966 [12]

The answer is 2. by transforming energy into other forms

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2 years ago

A fan connected to a 120-volt electrical system by an extension cord was worn through and exposed the bare, energized conductor,

kari74 [83]

Answer: the ladder

Explanation: since the energized conductor is already in contact with the ladder there by making electric current to flow. The base of the ladder is on the ground there by making the circuit to be complete and causing electrocution.

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2 years ago

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A carpenter is driving a 15.0-g steel nail into a board. His 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Half

bekas [8.4K]

Answer: The increase in temperature of the nail after the three blows is 8.0636 Kelvins. The correct option is (d).

Explanation:

Kinetic energy of the hammer ,K.E.=

$\frac{1}{2}mv^2=\frac{1}{2}1.00 kg\times (8.50 m/s)^2=36.125 J$

Half of the kinetic energy of the hammer is transformed into heat in the nail.

Energy transferred to the nail in one blow =

$\frac{1}{2}K.E.=\frac{1}{2}\times 36.125 J=18.0625 J$

Total energy transferred after 3 blows,Q = $3\times 18.0625 J=54.1875 J$

Mass of the nail = 15 g = 0.015 kg

Change in temperature = $\Delta T$

Specif heat of the steel = c = 448 J/kg K

$Q=mc\Delta T$

$54.1875 J=0.015 kg\times 448 J/kg K\times \Delta T$

$\Delta T=8.0636 K\approx 8.1 K$

The increase in temperature of the nail after the three blows is 8.1 Kelvins.Hence, correct option is (d).

4 0

2 years ago