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Bad White [126]

3 years ago

14

What does the area between the line and the x-axis represent on a velocity vs. time graph?

2 answers:

Finger [1]3 years ago

7 0

Answer:

It has been learned in this lesson that the area bounded by the line and the axes of a velocity-time graph is equal to the displacement of an object during that particular time period. ... Once calculated, this area represents the displacement of the object.

Explanation:

Rashid [163]3 years ago

5 0

Answer: It represents displacement

Explanation:

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The mass of a radioactive substance follows a continuous exponential decay model, with a decay rate parameter of 1% per day. A s

Bumek [7]

Answer:

2,38kg

Explanation:

Mass in function of time can be found by the formula: $m_{(t)} =m_{0} e^{-kt}$ , where $m_{0}$ is the initial mass, t is the time and k is a constant.

Given that a sample decay 1% per day, that means that after first day you have 99% of mass.

$m_{(1)} =m_{0} e^{-k(1)}$ , but $m_{(1)}=\frac{99m_{0} }{100}$ , so we have $\frac{99m_{0} }{100}=m_{0}e^{-k}$ , then $k=-ln(\frac{99}{100})=0.01$

Now using k found we must to find $m_{(5)}$ .

$m_{(5)}=m_{0}e^{-(0.01)5}=2.5kge^{-0.05} =2.5x0.951=2.38kg$

6 0

2 years ago

4. A little boy pushes a wagon with his dog in it. The mass of the dog and

Artyom0805 [142]

Answer:

<h2>59.5 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 70 × 0.85

We have the final answer as

<h3>59.5 N</h3>

Hope this helps you

6 0

3 years ago

A heating coil inside an electric kettle delivers 2.2 kW of electrical power to the water in the kettle. How long will it take t

Otrada [13]

Answer:

0.04s

Explanation:

Specific heat of water c = 4.186J/g.C

The heat energy it would take to heat up 0.5 kg of water from 30C to 72 C is

$E = mc\Delta T = 0.5 * 4.186 * (72 - 30) = 87.9 J$

If the power of the electric kettle is 2.2kW (or 2200W) and suppose the work efficiency is 100%, then the time it takes to transfer that power is

$t = \frac{E}{P} = \frac{87.9}{2200} = 0.04 s$

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2 years ago

An object with a kinetic energy of 2160J has a mass of 120kg. What is the velocity

luda_lava [24]

Hmmm the only formula i know is v = d * t or volocity = distance * time

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3 years ago

A very long, straight solenoid with a cross-sectional area of 2.00 cm2 is wound with 94.1 turns of wire per centimeter. Starting

julia-pushkina [17]

Yeah I have no clue what you saw me on lol yeah I

5 0

2 years ago