Use the following v-t graph to answer the next questions
5
B
Velocity )
neters/second(s)
4
A
3
2
1
Time (1)
0
1
2
3
4
5
2
8
10
11
12
13
1015
16
second(s)
.1
D
-2
C С
3
5

Answer:

...........................

Answer:

1º all

2º 1

3º 2

4º the same

Explanation:

Answer:

Power = 450 Joules / 50 seconds = 9 J/s = 9 W *average* power

Explanation:

Power = Energy / Time ( or Work / Time) just as Velocity = Distance / Time

So, the average power needed for 50 seconds to do 450 Joules of work is simply 450 J / 50 s = 9 J/s = 9 Watts  (The unit Watt is defined so that 1 Watt = 1 Joule / Second).  It's important to note that 9W is the *average* power. The problem does not say that Tyler does work at a constant rate, so it's worth adding that caveat to the answer!

Explanation:

s = ut + 1/2 a t^2

200 = 0 * 6 + 1/2 * a * (6)^2

200 = 1/2 * a * 36

200 = 18 a

a = 200/18

a= 11.1m/sec^2

v = u + at

v = 0 + 11.1 * 6

v = 66.6m/s

hope it helps you

Answer:

Computer engineer duties include doing research on software and computer hardware. Designing and testing computer hardware components. Like  processors, circuit boards, memory devices and routers. Writing and testing software mobile devices and computers.

Explanation:

Answer:

Computer engineer duties include: Conducting research on software and computer hardware. Designing and testing computer hardware components, such as processors, circuit boards, memory devices and routers. Writing and testing software for mobile devices and computers.

Explanation:

Answer:

The correct option is A

Explanation:

Firstly, it should be noted that the freezing point of a substance can be assumed to be melting point of that substance because a substance will normally change from liquid to solid (freezes) at the same point it changes from solid to liquid (melts). For example, water freezes at 0°C and also starts melting at 0°C.

Thus, the substance with the lowest melting point among the substances mentioned in the question is alcohol (ethanol) with the melting point of -114°C. Hence, ethanol also has the lowest freezing point thereby freezing at the lowest temperature.

Answer:

Explanation:

To find how long it took we use the formula

[tex]t = \frac{d}{v} \\ [/tex]

d is the distance

v is the velocity

From the question we have

[tex]t = \frac{30}{15} \\ [/tex]

We have the final answer as

Hope this helps you

Use the definition of average acceleration:

a = ∆v / t

If v is the starting speed, then ∆v = 0 - v, so solve for v :

-6.42 m/s² = (0 - v) / (2.85 s)

v = (6.42 m/s²) (2.85 s)

v ≈ 18.3 m/s

Answer:

potential energy or stored energy

Explanation:

Answer:

Motion

Explanation:

Edge2021

Answer:

the answer is b as cenvection only occurs through movement of liquids and gases

Explanation:

Answer:

the answer is b

Answer:

If the average kinetic energy is greater than the attractive forces between the particles, a substance will not condense to form a liquid or a solid. If the kinetic energy is less than the attractive forces, a liquid or solid will form.

Explanation:

Answer:

(a) 48 km

(b) 102 km

(c) 48.96 km/h.

Explanation:

Assuming that at first, the car travels from point A to point B, then the cat returns from point B to point C.

As the car traveled from point A to point B in 1 hour 15 minutes with a speed of 60 km/h.

Using distance = speed x time, so

Distance traveled from A to B is

[tex]d_{AB}= 60 x 1.25=75[/tex] km [ as time = 1 h 15 min = 1.25 h]

Stop time at point B is 5 minutes.

For the return journey, from point B to C:

Speed = 10 m/s

Time = 45 minutes = 45 x 60 seconds = 2700 seconds

Distance traveled from point B to C is

[tex]d_{BC}=[/tex] 10 x 2700 = 27000 meters

as 1000 meters = 1 km, so

[tex]d_{BC}=[/tex] 27 km.

(a) The final position of the car from the starting point A is the distance between points A and C.

[tex]d_{AC}=[/tex]75 -27=48 km.

Hence, the car is 48 km away from point A.

(b) Total distance traveled,

[tex]d= d_{AB}+d_{BC}=[/tex]75+27=102 km.

(c) Total time taken

t= 1.25 hour + 5 minutes + 45 minutes

= 5/4 hour + 5/60 hour + 45/60 hour [ as 1 hour = 60 min]

=25/ 12 hours.

Total distance traveled, d= 102 km [ from part (b)]

Average speed = (Total distance traveled)/(Total time taken)

=102/ (25/12)= 48.96 km/h.

Hence, the average speed of the car is 48.96 km/h.

The others are:

Ampere

Mol

Candela

Answer:

hope it is helpful to you

Answer:

0.5m/s2

..............

Answer:

Pressure, temperature and humidity all affect air density. And you can think of air density as the mass of air molecules in a given volume.

Explanation:

Answer:

The reactivity of metals increases as you move left in a period and as you move down in a group, so Marie needs to know the period and group of the element inside each box. Boxes that show locations in groups 1 or 2 or in period 8 contain the most reactive elements.

Explanation:

Answer:

The Group Number of the elements.

Explanation:

If Marie knew the group number of the elements, then she could determine the amount of valence electrons each element has and their reactivity rate. For example, if one box tells her that an element is located in group 18, then she could determine that the element is not very reactive. This is because elements in group 18 have 8 valence electrons, which makes them stable/unreactive.

Hope this helps!

Answer:

Solid, Liquid and Gas

Explanation:

They are the 3 states or stages of Matter

Answer:

Explanation:

The sun is made up of 6 parts. Namely:

The convection area is just above the radiation zone. As materials from the suns core are heated, they rise above the radiation zone towards the EDGE of the convection area then sinks back again into the radiative zone for more heat.

The radiative zone is 12.6 million Fahrenheit hot and is just above the core.

The core of the son is not solid but plasma whose motion is like gas. Its temperature stands at 48 million Fahrenheit

Cheers

Answer:

12m is your displacement

Answer:

5

Explanation:

Its a shortcut from A to C........I think

Answer:

The tiny object's acceleration will be much greater.

Explanation:

Because of Newton's second law of motion, (which is F=ma or Force= Mass*acceleration), then if the force maintains the same (which in this case it does, because it says 50 N to both obejcts) and  one mass was much greater than the other, then the ould be less for the more massive object and much greater for the lighter object.

For example:  If 50 N were applied to a 500 kg object and a 50 kg object, then theformulas for each (respectively) are:

50 = 500*acceleration

and

50 = 50*acceleration

(Because of Newtons Second Law of Motion)

Then, solving for the equations, we get for equation 1:

Acceleration = .1 m/s^2

And for equation 2:

Accleration = 1 m/s^2

Thus, you can see that more massive objects (when applied he same amount of force as the smaller object) clearly have less accleration than the smaller objects.

Answer:

B because thats the answer

42000 kilometers

Explanation:

distance is velocity × time

28000 ×1.5

42000

remember to match units

thats why i wrote 1.5 hours instead of 90minutes

Answer:

280N

Explanation:

f = mass x acceleration

Answer:

Velocity

Explanation:

The rate of change in position at a given point in time is called velocity.

Answer:

Magnets are only attracted to special metals. Iron, cobalt and nickel are magnetic. Metals that have iron in them attract magnets well.

Explanation:

from Google

Answer:

Magnets can only attract some metals. These special metals are called ferromagnetic. Magnets are usually made of iron, cobalt, and nickel, which are also the ferromagnetic metals.

Explanation:

Answer:

A signal apprentice works for a rail company, learning the duties of a signal maintainer through on-the-job training and experience. As part of this apprenticeship, you work on a railway to assist a seasoned signal maintainer as they install, repair, inspect, and test signal equipment.

Explanation:

Answer:

6500g

Explanation:

7000 - 500 = 6500

The mass of paint will be "6500 g".

Given:

Total mass,

Volume,

Mass of empty tin,

Now,

The mass of paint will be:

= Total mass - Mass of empty tin

By putting the values, we get

= [tex]7000-500[/tex]

= [tex]6500 \ g[/tex]

Thus the approach above is correct.

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https://brainly.com/question/25002441