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Keith_Richards [23]
3 years ago
14

Which are characteristics of all living things? Select three options.

Physics
1 answer:
lorasvet [3.4K]3 years ago
3 0

Which are characteristics of all living things? Select three options.

a.grow and develop

b.make their own food

c.are made of many cells

d.respond to stimuli

e.can reproduce

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(5 pt) You tie a cord to a pail of water, and your swing the pail in a vertical circular 0.700 m. What is the minimum speed must
Bas_tet [7]

Answer:

The minimum speed required  is 2.62m/s

Explanation:

The value of  gravitational acceleration = g = 9.81 m/s^2

Radius of the vertical circle = R = 0.7 m

Given the mass of the pail of water = m

The speed at the highest point of the circle = V

The centripetal force will be needed must be more than the weight of the pail of water in order to not spill water.

Below is the calculation:

\frac{mV^{2}}{R} = mg

V = \sqrt{gR}

V = \sqrt{9.81 \times 0.7}

V = 2.62 m/s

6 0
3 years ago
An object is dropped at a height of 6 m from the ground. How fast is it moving just before it hits the ground?
maw [93]

Explanation:

Given:

Δy = 6 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: v

v² = v₀² + 2aΔy

v² = (0 m/s)² + 2 (9.8 m/s²) (6 m)

v ≈ 10.8 m/s

Round as needed.

3 0
3 years ago
A crate is pulled 7 m across a smooth surface. The tension in the rope pulling the crate is 40 N. If the work on the crate is 24
Marina CMI [18]

Answer:

<em>61.9°</em>

Explanation:

The formula for calculating the workdone is expressed as

Workdone = Fdsin theta

F is the force applied on the crate

d is the distance covered

theta is the angle that the rope makes with the horizontal

Given

F = 40N

d = 7m

Workdone = 247J

Substituting into the formula:

247 = 40(7)sin theta

247 = 280sin theta

sin theta = 247/280

sin theta = 0.88214

theta = arcsin(0.88214)

theta = 61.9°

<em>Hence the angle that the rope makes with the horizontal is 61.9°</em>

5 0
3 years ago
The name of the process used to refine oil into different products is
GaryK [48]

Distillation

Explanation:

The name of the process used to refine oil into different products is called distillation. A refinery has huge distillation columns where is separated into its different fractions.

  • Distillation is a separation technique in which a mixture such as crude oil is separated into its fractions.
  • The components of the mixture must have an appreciable boiling point difference.
  • After distillation, oil is separated into difference components such as heavy oil, natural gas, kerosene, gasoline e.t.c.
  • The liquid with the least boiling point rises up in the column first and is collected.

Learn more:

Gasoline brainly.com/question/4615337

#learnwithBrainly

6 0
4 years ago
You are standing against the wall near a corner of a large building. A friend is standing against the wall that is around the co
g100num [7]

Answer:

Sound Waves only needs a medium which in this case is Air,not withstanding the wall demarcation.

Explanation:

Sounds Waves can't be seen,they are Invisible.Anytime a person talks the produce vibration,and anytime you see vibration you are definitely seeing sounds.

You hearing your friend talk to you from the other compartment is made possible because their is a medium which in this case is Air.

Sound waves can travel in other medium apart from Air,Such Medium Includes Water and solids.

Air is invisible and when you talk you are sending sound waves into the air which in turn causes vibration which in this case you don't see but you can hear provided its of a reasonable pitch.

7 0
4 years ago
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