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3 years ago

I’m stuck in B and D. which one is it?

Physics

2 answers:

Varvara68 [4.7K]3 years ago

8 0

Answer:

Option b is correct - Rocky, nearly continuous, found on earth surface.

The reason is it is the rocky surface area composed of crust and upper mantle part. Basically, it is the outer shell of earth.

tatuchka [14]3 years ago

6 0

It is b! the lithosphere is the crust and upper mantle

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What is the period of a wave with the wave speed of 12m/s and a frequency of 60 hz?

aleksklad [387]

To determine the period of a wave you need not utilize the value for the wave speed.

The formula for the period is T= 1/f
T stands for period/time while f is for frequency. Substitute the value for the frequency which is 60 Hz. That would give you:

T= 1/60 Hz

convert Hz to cycles per second to extract the unit of time (s).

60 Hz x 1/s/1 Hz= 60/s

To continue the computation:

T=1/60/s that will give you a T= 0.017 s or 17 ms.

4 0

4 years ago

A toy cannon tosses a rubber ball straight upward. A motion sensor measures the speed of the ball as it leaves the cannon. Using

mezya [45]

Answer:

With this information is not possible to calculate the mass.

Explanation:

This is a characteristic problem of energy conservation, where kinetic energy becomes potential energy. For this particular problem, we have the initial speed as input data. The moment the ball comes out of the cannon we have the maximum kinetic energy, as the ball goes up the ball will gain more potential energy as the ball loses kinetic energy, until the moment the ball reaches the maximum height. At the maximum height point, the ball will have its maximum potential energy while its kinetic energy is zero. In other words, all the kinetic energy that was, in the beginning, was transformed into potential energy.

$E_{p}=E_{k}\\m*g*h=0.5*m*v^2$

In the above equation the masses are canceled and we can determine the maximum height, by means of the initial speed.

$h=\frac{0.5*v^2}{g} [m]$

But the mass cannot be determined, since it would be necessary to know the value of the energy, in order to determine the value of the mass.

3 0

3 years ago

The IMA is always smaller than the AMA. True False

VMariaS [17]

Best answer must be false. Because the IMA it doesn't have always stay smaller than the AMA. Hope it helped you!

6 0

4 years ago

Do electric fields point towards or away from positive charges?

juin [17]

Answer:

it points towards positive charges

3 0

3 years ago

what is the mass of a cannon ball if a force 2500 N gives the cannon ball an acceleration of 200 m/s squared?

nignag [31]

Using Newton's second law of motion:

F=ma ; [ F = force (N: kgm/s^2);m= mass (kg); a = acceleration (m/s^2)

Given: Find: Formula: Solve for m:

F: 2500N mass:? F=ma Eq.1 m=F/a Eq. 2

a= 200m/s^2

Solution:

Using Eq.2

m= (2500 kgm/s^2)/ (200m/s^2) = 12.5 kg

8 0

3 years ago