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2 years ago

A bug starts at point A, crawls 8.0 cm east, then 5.0 cm south, 3.0 west, and 4.0 cm north to point B.

Physics

1 answer:

Sholpan [36]2 years ago

7 0

Answer:

5cm east& 1cm west from A

Explanation:

https://brainly.ph/question/2753392

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A car increases its speed from 9.6 meters per second to 11.2 meters per second in 4.0 seconds. The average acceleration of the c

Gwar [14]

The acceleration is the change of speed/velocity over time. Thus to calculate this you do (V1-V2)/T or (11.2-9.6)/4 or 0.4 m/s^2

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2 years ago

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To practice Problem-Solving Strategy 29.1: Faraday's Law. A metal detector uses a changing magnetic field to detect metallic obj

ExtremeBDS [4]

Answer:

$1.138\times 10^{-3}V$

Explanation:

Apply Faraday's Newmann Lenz law to determine the induced emf in the loop:

$\epsilon=\frac{d\phi}{dt}$

where:

$d\Phi-$ variation of the magnetic flux

$dt-$ is the variation of time

#The magnetic flux through the coil is expressed as:

$\Phi=NBA \ Cos \theta$

Where:

N- number of circular loops

A-is the Area of each loop( $A=\pi r^2=\pi \times 5^2=78.5398$ )

B-is the magnetic strength of the field.

$\theta=15\textdegree$ - is the angle between the direction of the magnetic field and the normal to the area of the coil.

$\epsilon=-\frac{d(78.5398\times 10^{-3}NB \ Cos \theta)}{dt}\\\\=-(78.5398\times 10^{-3}N\ Cos \theta)}{\frac{dB}{dt}$

$\frac{dB}{dt}-$ =0.0250T/s is given as rate at which the magnetic field increases.

#Substitute in the emf equation:

$=-(78.5398\times 10^{-3} m^2 \times 6\ Cos 15 \textdegree)\times 0.0250T/s\\\\=1.138\times 10^{-3}V$

Hence, the induced emf is $1.138\times 10^{-3}V$

4 0

2 years ago

A Porsche challenges a Honda to a 200-m race.Because the Porsche's acceleration of 3.5 m/s2 is larger than the Honda's 3.0 m/s2,

Blizzard [7]

Answer:

Honda won by 0.14 s

Explanation:

We are given that

Distance =S=200 m

Initial velocity of Honda=u=0m/s

Initial velocity of Porsche=u'=0m/s

Acceleration of Honda= $3.0m/s^2$

Acceleration of Porsche's= $3.5m/s^2$

Time taken by Honda to start=1 s

$s=ut+\frac{1}{2}at^2$

Substitute the values

$200=0(t)+\frac{1}{2}(3)t^2$

$200=\frac{3}{2}t^2$

$t^2=\frac{200\times 2}{3}=\frac{400}{3}$

$t=\sqrt{\frac{400}{3}}=11.55s$

Time taken by Honda=11.55 s

Now, time taken by Porsche

$200=\frac{1}{2}(3.5)t^2$

$t^2=\frac{200\times 2}{3.5}$

$t=\sqrt{\frac{400}{3.5}}=10.69 s$

Total time taken by Porsche=10.69+1=11.69 s

Because it start 1 s late

Time taken by Honda is less than Porsche .Therefore, Honda won and

Time =11.69-11.55=0.14 s

Honda won by 0.14 s

3 0

2 years ago

A plane took 7 hours to travel 2020 km. For the first 4 hours,

kicyunya [14]

Answer:

-6.6 km/h

Explanation:

In 7hr plane travelled 2020km;

For the first 4hr the average speed was 310km/h;

d=st, s=d/t;

Distance covered in first 4h is d = 310km/h×4h = 1240km;

See the image attached for further solution

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2 years ago

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What type of wave cannot travel in a vacuum

lions [1.4K]

A sound wave. Because in a vacuum there is no medium in a vacuum. And the only wave that requires a medium to travel through is a sound wave.

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2 years ago

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