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4 years ago

How to do 2 a ? (physics)please help ..thxx

Physics

1 answer:

Cerrena [4.2K]4 years ago

4 0

The down arrow is drag
The up arrow is thrust

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A 22.0 ohm and 75.0 ohm resistor are in parallel, connected to a 5.00 v battery. how much current flows out of the battery

Julli [10]

Answer:

294 mAmps

Explanation:

The two resistors are equal to 22 * 75 / ( 22+ 75) = 17.01 ohm

V = IR

V/R = I

5 / 17.01 = .294 A

5 0

2 years ago

a shot putter accelerates a 7.3kg shot from rest to 14m/s in 1.5r seconds. what average power was developed?

Sedaia [141]

Explanation:

$power = \frac{energy \: expended}{time}$

m = 7.3kg

u = 0

v = 14m/s

t = 1.5sec

P = (0.5×7.3×14²) ÷ 1.5

P = 476.93

P = 477 watt

3 0

4 years ago

An airplane pilot wishes to fly directly westward. According to the weather bureau, a wind of 75.0 km/hour is blowing southward.

Alex17521 [72]

Answer:

The speed of the plane relative to the ground is 300.79 km/h.

Explanation:

Given that,

Speed of wind = 75.0 km/hr

Speed of plane relative to the air = 310 km/hr

Suppose, determine the speed of the plane relative to the ground

We need to calculate the angle

Using formula of angle

$\sin\theta=\dfrac{v'}{v}$

Where, v'=speed of wind

v= speed of plane

Put the value into the formula

$\sin\theta=\dfrac{75}{310}$

$\theta=\sin^{-1}(\dfrac{75}{310})$

$\theta=14.0^{\circ}$

We need to calculate the resultant speed

Using formula of resultant speed

$\cos\theta=\dfrac{v''}{v}$

Put the value into the formula

$\cos14=\dfrac{v''}{310}$

$v''=\cos14\times310$

$v''=300.79\ km/h$

Hence, The speed of the plane relative to the ground is 300.79 km/h.

6 0

3 years ago

Two point sources are vibrating in phase producing two-dimensional water wave interference. The first antinodal line on either s

Viktor [21]

For all antinodal positions we know that

$\Delta \phi = 2N\pi$

now we also know the relation between phase difference and path difference

$\Delta \phi = \frac{2\pi}{\lambda}\Delta x$

now we will have

$2N\pi = \frac{2\pi}{\lambda}\Delta x$

now from above equation we will have

$\Delta x = N\lambda$

now for the first anti node position

N = 1

$\Delta x = \lambda$

Option D is correct

4 0

3 years ago

Where is the Oort Cloud located?

Nonamiya [84]

Answer:

Explanation:

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3 years ago