All categories

4 years ago

What is the most important feed grain for livestock

Physics

1 answer:

Anettt [7]4 years ago

5 0

It’s hay, most farmers have their livestock eat hay and grass

You might be interested in

As temperature increases, the speed of sound: decreases increases remains the same

Verdich [7]

The answer is actually as temperature decreases the speed of sound decreases. "As temperature decreases, the speed of sound decreases. As pressure, or oceanic depth, increases, the speed of sound increases." - my book.

5 0

4 years ago

What is the relationship between potential and kinetic energy?

PilotLPTM [1.2K]

Potential energy is stored an object , where as kinetic energy is energy in a object during movement . Potential energy is what kinetic energy transfers into

6 0

4 years ago

Read 2 more answers

You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the rea

KonstantinChe [14]

Answer : The half-life of this substance will be, 45 minutes.

Explanation :

First we have to calculate the value of rate constant.

Expression for rate law for first order kinetics is given by:

$k=\frac{2.303}{t}\log\frac{a}{a-x}$

where,

k = rate constant = ?

t = time passed by the sample = 90.3 min

a = initial amount of the reactant = 400

a - x = amount left after decay process = 100

Now put all the given values in above equation, we get

$k=\frac{2.303}{90.3min}\log\frac{400}{100}$

$k=1.54\times 10^{-2}\text{ min}^{-1}$

Now we have to calculate the half-life of substance, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$1.54\times 10^{-2}\text{ min}^{-1}=\frac{0.693}{t_{1/2}}$

$t_{1/2}=45min$

Therefore, the half-life of this substance will be, 45 minutes.

4 0

3 years ago

How do scientists determine the age of the solar system?

Sholpan [36]

By studying meteorites which are the most ancient material in space.

7 0

3 years ago

The beautiful Multnomah Falls in Oregon are approximately 206m high. If the Columbia river is flowing horizontally at 2.90m/s ju

zhenek [66]

Answer:

The overall velocity of the water when it hits the bottom is:

$v_f=63.61\ \frac{m}{s}$

Explanation:

Use the law of conservation of energy.

Call it instant [1] to the moment when the water is just before reaching the falls.

At this moment its height h is 206 meters and its velocity horizontally $v_i$ is $v_i = 2.90$ m/s.

At the instant [1] the water has gravitational power energy $E_g$

$E_g = mgh$

The water also has kinetic energy Ek.

$E_k = 0.5mv_i ^ 2$

Then the Total E1 energy is:

$E_1 = mgh + 0.5mv_i ^ 2$

In the instant [2] the water is within an instant of touching the ground. At this point it only has kinetic energy, since the height h = 0. However at time [2] the water has maximum final velocity $v_f$

So:

$E_2 = 0.5mv_f ^ 2$

As the energy is conserved then $E_1 = E_2$

$mgh + 0.5mv_i ^ 2 = 0.5mv_f ^ 2$

Now we solve for $v_f$ .

$gh + 0.5v_i ^ 2 = 0.5v_f ^ 2\\\\9.8(206) + 0.5(2.90) ^ 2 = 0.5v_f 2\\\\v_f^2 = \frac{9.8(206) + 0.5(2.90) ^ 2}{0.5}\\\\v_f = \sqrt{\frac{9.8(206) + 0.5(2.90) ^ 2}{0.5}}\\\\v_f=63.61\ \frac{m}{s}$

7 0

3 years ago