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Sedbober [7]
3 years ago
13

How many World Cups have the U.S. Women's National Soccer Team won?

Physics
1 answer:
Alenkasestr [34]3 years ago
5 0

Answer: 4

Explanation: I watched them win their 3rd and 4th

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Bettina spoke into a microphone during the school play to increase the sound of her voice so the audience could hear her speak.
grandymaker [24]
The loudness was increased by the amplifier which converted electrical energy into sound energy.
7 0
3 years ago
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A cylindrical container closed of both end has a radius of 7cm and height of 6cm A.)find the total surface area of the container
Natalka [10]

Given:

A cylindrical container closed of both end has a radius of 7cm and height of 6cm.

Explanation:

A.) Find the total surface area of the container.

  • A = 2πrh + 2πr²
  • A = 2(3.14)(7)(6) + 2(3.14)(7 × 7)
  • A = 263.76 + 307.72
  • A = 571.48

B.) Find the volume of the container.

  • V = πr²h
  • V = (3.14)(7×7)(6)
  • V = 923.16

Not sure huhuness.

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8 0
3 years ago
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A subway train accelerates from rest at one station at a rate of 1.30 m/s^2 for half of the distance to the next station, then d
Minchanka [31]

This problems a perfect application for this acceleration formula:

         Distance = (1/2) (acceleration) (time)² .

During the speeding-up half:     1,600 meters = (1/2) (1.3 m/s²) T²
During the slowing-down half:    1,600 meters = (1/2) (1.3 m/s²) T²

Pick either half, and divide each side by  0.65 m/s²: 

                         T² = (1600 m) / (0.65 m/s²)

                         T = square root of (1600 / 0.65) seconds

Time for the total trip between the stations is double that time.

                         T =  2 √(1600/0.65) = <em>99.2 seconds</em>  (rounded)


7 0
3 years ago
You then measure Polly's internal temperature to be 13oC, which is quite a drop from the normal human body temperature of 37oC.
ankoles [38]

Answer:

The specific heat is 3.47222 J/kg°C.

Explanation:

Given that,

Temperature = 13°C

Temperature = 37°C

Mass = 60 Kg

Energy = 5000 J

We need to calculate the specific heat

Using formula of energy

Q= mc\Delta T

c =\dfrac{Q}{m\Delta T}

Put the value into the formula

c=\dfrac{5000}{60\times(37-13)}

c=3.47222\ J/kg^{\circ}C

Hence, The specific heat is 3.47222 J/kg°C.

5 0
3 years ago
A golf ball with m = 46 g is struck a blow which makes an angle of 45o with the horizontal. The drive lands 200 m away on a flat
AfilCa [17]

Answer:

Average force will be equal to 2908.57 N  

Explanation:

We have given mass of the ball m = 46 gram = 0.046 kg

Let velocity at which ball is projected is u m/sec

Angle at which ball is projected \Theta =45^{\circ}

Range of the ball is given R = 200 m

Range is equal to R=\frac{u^2sin2\Theta }{g}

200=\frac{u^2sin(90^{\circ})}{9.8}

u^2=1960

u = 44.27 m/sec

Change in momentum of the ball is equal to P=mu=0.46\times 44.27=20.36kgm/sec

Time of impact is given dt=7ms=0.007sec

Force is equal to rate of change of momentum

So force F=\frac{dP}{dt}=\frac{20.36}{0.007}=2908.57N

Force will be equal to 2908.57 N

7 0
3 years ago
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