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3 years ago

PLEASE HELP!! ILL MARK BRAINLYEST!!

Physics

2 answers:

frez [133]3 years ago

6 0

Answer: true

Explanation: Matter is all the “stuff” that exists in the universe. It has both mass and volume. Mass measures the amount of matter in a substance or an object.

topjm [15]3 years ago

3 0

Answer: True

Explanation:

Mass is the amount of matter in an object. Everything is made up of matter.

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You need to design a 60.0-Hz ac generator that has a maximum emf of 5500 V. The generator is to contain a 150-turn coil that has

olchik [2.2K]

Answer:

So magnetic field will be equal to 0.1144 T

Explanation:

We have given frequency f = 60 Hz

Maximum emf e = 5500 volt

Number of turns N = 150

Area $A=0.85m^2$

Emf generated in ac generator is given $e=NBA\omega sin(\omega t)$

For maximum emf $sin(\omega t)=1$

So maximum emf will be equal to $e=NBA\omega$

$B=\frac{e}{NA\omega }=\frac{5500}{150\times 2\times 3.14\times 60\times 0.85}=0.1144T$

So magnetic field will be equal to 0.1144 T

3 0

3 years ago

Can somebody answer this for me asap!

andreev551 [17]

It shows all except the types of precipitation and created for newspapers

7 0

2 years ago

The opening to a cave is a tall, 30-cm-wide crack. A bat that is preparing to leave the cave emits a 30 kHz ultrasonic chirp. Ho

sweet-ann [11.9K]

Answer:

Width of sound beam is 7.557 m

Explanation:

First we will calculate the wave length from given data:

λ=v/f

Were:

v is the speed

f is the frequency

$\lambda=\frac{340}{30*10^3}\\ \lambda=0.01133 m$

We considered the opening long and narrow, Using single slit diffraction formula:

mλ=dsinΘ

where:

d is the crack width

m is the order

Θ is angle

Considering m=1, The angle between first minimum from center of beam is:

$\theta=sin^{-1}(\frac{m\lambda}{d})\\\theta=sin^{-1}(\frac{1*0.01133}{30*10^{-2}})\\ \theta=2.164^o$

The width of beam is:

tanΘ=y/L

$tan\theta=\frac{w/2}{L}\\ w=2L\ tan\theta\\w=2*100*tan 2.164\\w=7.557 m$

Width=7.557 m

5 0

3 years ago

If you have a density of 100kg/L and a mass of 1000 units, tell me the following: second what is the volume

adell [148]

Answer:

volume is 0.1 L

Explanation:

you can use the equation density=mass/volume

100 = 1000 / v

divide by 1000 on both sides

0.1 = v

8 0

3 years ago

Electric current comes from the movement or flow of____ charged

Ivahew [28]

Answer:

negatively ,

That all I can help you.

7 0

2 years ago