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oksano4ka [1.4K]

3 years ago

11

Which simple machines combine to make scissors? A. one lever and two wedges B. two levers and two wedges C. one inclined plane a

nd two wedges D. two inclined planes and two wedges

2 answers:

VikaD [51]3 years ago

7 0

B which is two leavers and two wedges

MrMuchimi3 years ago

7 0

The answer would be
B) Two levers and two wedges.

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At 15°C air is transmitted <br>at 340 m/s. Express this speed<br>in Kilometers per hour.

EleoNora [17]

Answer:

1224km/hr

Explanation:

To convert from m/s to km/hr

1000m = 1km

Divide both sides by 1000

1m = 1/1000 km................. (1)

60×60 seconds = 1 hr

3600s = 1hr

Divide both sides by 3600

1s = 1/3600 .............(2)

Divide (2) by (1)

1m/s = 1/1000 ÷ 1/3600 km/hr

1m/s = 1/1000 × 3600/1 km/hr

1m/s = 3600/1000 km/hr

1m/s = 3.6 km/hr .............(3)

To convert 340m/s to km/hr

Multiply (3) by 340

1× 340m/s = 3.6 × 340 km/hr

340m/s = 1224km/hr

I hope this was helpful, please mark as brainliest

7 0

4 years ago

Read 2 more answers

Why does the frequency of a siren get higher as an ambulance using that siren gets closer

Nadya [2.5K]

The frequency of a wave becomes higher due to the object moving at a fast pace coming towards you with shorter wavelengths (depending on the speed) aka the Doppler Effect.
Hope this helps

3 0

3 years ago

Read 2 more answers

What is an example of a secondary group?

Angelina_Jolie [31]

Answer:(D)The teachers from the science department

Explanation:I took the quiz

3 0

3 years ago

You leave on a 450 miles trip in order to attend a meeting that will start 10.8 hours after you begin your trip. Along the way y

konstantin123 [22]

Answer:

c. 2.6 h

Explanation:

The longest time spent over dinner is the time that you have available minus the minimum possible time spent in the trip.

The time of the trip is found using:

t = $\frac{d}{v}$

Where distance is d and velocity is v. The time will be minimum at maximum velocity. Replacing with the data we have:

Ttrip = $\frac{450}{55}$ = 8.1818 h

Tdinner = 10.8h - 8.1818 h = 2.6181h

that aproximates 2.6 h.

4 0

3 years ago

Tarzan swings on a 36.0 m long vine initially inclined at an angle of 31.0◦ with the vertical. The acceleration of gravity if 9.

aleksandrvk [35]

Answer:

v = 10 m/s

Explanation:

Given,

Length of the vine, l = 36 m

Angle of inclination = 31.0◦ with the vertical

acceleration due to gravity = 9.81 m/s²

Using Conservation of energy

KE = PE

$\dfrac{1}{2} mv^2 = m g h$

$v = \sqrt{2gh}$

$v = \sqrt{2 g l(1-\cos \theta)$

$v = \sqrt{2\times 9.81\times 36 \times (1-\cos 31^0)$

v = 10 m/s

Hence, the speed of the swing is equal to 10 m/s

7 0

3 years ago