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2 years ago

A particle moves according to the equation x = 11t^2, where x is in meters and t is in seconds.

1 answer:

4 0

We are given the equation:

x = 11t^2

We use that equation to calculate for the distance traveled.
For (a)

At t=2.20 sec,
x =53.24 meters

At t=2.95 sec,
x =95.73 meters

Velocity = (95.73 meters - 53.24 meters) / (2.95 s - 2.20 s ) = 56.65 m/s

For (b)

At t=2.20 sec,
x =53.24 meters

At t=2.40 sec,
x =63.36 meters

Velocity = (63.36 meters - 53.24 meters) / (2.40 s - 2.20 s ) = 50.6 m/s

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What is the net displacement of the particle between 0 seconds and 80 seconds?

Illusion [34]

After a thorough research, there exists the same question that has choices and the link of the graph (http://i37.servimg.com/u/f37/16/73/53/52/graph410.png)

Choices:
A. 160 meters
B. 80 meters
C. 40 meters
D. 20 meters
E. 0 meters

The correct answer is letter E. 0 meters.

7 0

3 years ago

Consider a large tank holding 1000 L of pure water into which a brine solution of salt begins to owat a constant rate of 6L/min.

lbvjy [14]

Answer:

T = 693.147 minutes

Explanation:

The tank is being continuously stirred. So let the salt concentration of the tank at some time t be x in units of kg/L.

Therefore, the total salt in the tank at time t = 1000x kg

Brine water flows into the tank at a rate of 6 L/min which has a concentration of 0.1 kg/L

Hence, the amount of salt that is added to the tank per minute = $(6\times0.1)kg/min=0.6kg/min$

Also, there is a continuous outflow from the tank at a rate of 6 L/min.

Hence, amount of salt subtracted from the tank per minute = 6x kg/min

Now, the rate of change of salt concentration in the tank = $\frac{dx}{dt}$

So, the rate of change of salt in the tank can be given by the following equation,

$1000\frac{dx}{dt} =0.6-6x$

or, $\int\limits^{0.05}_0 {\frac{1000}{0.6-6x} } \, dx =\int\limits^T_0 {} \, dt$

or, T = 693.147 min (time taken for the tank to reach a salt concentration

of 0.05 kg/L)

3 0

3 years ago

The wave property that is related to the height of a wave is the

DedPeter [7]

Answer:

Amplitude

Explanation:

The amplitude is maximum height a wave is measured from its rest position.

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3 years ago

What H and N can friction produce?

Oksi-84 [34.3K]

The answer is that FRICTION PRODUCES HEAT.

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3 years ago

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Countries such as Ireland, Germany and the UK use wind turbines to generate power. How does a wind turbine transform energy?

kiruha [24]

Answer:

Rf5 is 6 and I have an article on common strategies for coping

Explanation:

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2 years ago