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4 years ago

Earth Science help needed

Physics

2 answers:

denis23 [38]4 years ago

6 0

D it is D the answer is D

Maurinko [17]4 years ago

5 0

Answer:

It is letter D. core, mantle crust

Explanation:

i got this from study island i got the same question

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What happens when an experiment with new information or new technology produces results that support an existing theory? the the

Oksi-84 [34.3K]

The theory is revised or updated. It may strengthen; however, cannot become a law. The "catch" with theories is that they may be disproven at any point in time by experimental results that contradict them. Therefore, they cannot become a law by just one additional supporting experiment.

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3 years ago

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How to find the frictional force acting on an object (not the friction coefficient)? ...?

Dovator [93]

One can simply find the frictional force acting on an object using this equation:

(Ffrict = μ•Fnorm)

The process of determining the value of the individual forces acting upon an object involve an application of Newton's second law (Fnet=m•a) and an application of the meaning of the net force. If mass (m) and acceleration (a) are known, then the net force (Fnet) can be determined by use of the equation.

Fnet = m • a

If the numerical value for the net force and the direction of the net force is known, then the value of all individual forces can be determined.

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3 years ago

The hindenburg zeppelin contained 200,000 m^3 of hydrogen, with a density of 0.0899 kg/m^3. What is the mass of the hydrogen?

oksian1 [2.3K]

d=m/v

0.0899=m/200000

or,0.0899*200000=m

m=17980

6 0

3 years ago

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A seashell is suspended in the air at rest by two strands of spider silk. Each strand of silk makes an angle of 75 degrees above

Ksenya-84 [330]

The mass of the seashell suspended by the two strands of spider silk is 0.28 kg.

The given parameters:

Tension on each strand of silk, T = 1.42 N
Angle of inclination of each strand, θ = 75⁰

The mass of the seashell at equilibrium is calculated by applying Newton's second law of motion;

$\Sigma F = 0\\\\T_1 sin(\theta) + T_2 sin(\theta) - W = 0$

where;

W is the weight of the seashell

The weight of the seashell is calculated as;

$1.42 \times sin(75) \ + \ 1.42 \times sin(75) \ - W = 0\\\\2.743 - W = 0\\\\W = 2.743 \ N$

The mass of the seashell is calculated as follows;

$W = mg\\\\m = \frac{W}{g} \\\\m = \frac{2.743}{9.8} \\\\m = 0.28 \ kg$

Thus, the mass of the seashell suspended by the two strands of spider silk is 0.28 kg.

Learn more about equilibrium forces here: brainly.com/question/8045102

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3 years ago

Two charged particles are projected into a magnetic field that is perpendicular to their initial velocities. If the charges are

Svetllana [295]

Answer:

The two charged particles are opposite charge (one positive, the other negative)

Explanation:

This can be explained through Fleming's left hand rule. As we know in Fleming's LH rule

Thumb: represent motion of the charge

Fore finger: direction of magnetic field

Centre finger: direction of current

In this case, the direction of magnetic field is in one way (perpendicular to direction of the particles motion)

If the charge is positive, equivalently it's direction is the same as the direction of current. If the charge is negative, it's direction is opposite the direction of current.

Using the fleming left hand rule, we'll see that as we change the direction of current without changing the direction of field, the direction of motion will change towards the opposite way.

For example, let's say the particles is moving away from you and the magnetic field is from left to right:

If the charge is positive (hence direction of current is away from you), the particles will move downward.

If the charge is negative (hence direction of current is toward you), the particles will move upward.

With these evidence, no doubt that the two particles have different charges.

7 0

4 years ago