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3 years ago

Distance and direction of an objects change in position from starting point

Physics

1 answer:

Tju [1.3M]3 years ago

6 0

Answer:

An object changes position if it moves relative to a reference point. The change in position is determined by the distance and direction of an object's change in position from the starting point (displacement). Direction • Direction is the line, or path along which something is moving, pointing, or aiming.

Explanation:

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Estimate the mass of water that must evaporate from the skin to cool the body by 0.55 ∘c. assume a body mass of 100 kg and assum

Gala2k [10]

Heat required to decrease the temperature of body is given as

$Q = ms\Delta T$

here given that

$m = 100 kg$

$s = 4 J/g ^0C = 4000 J/Kg ^0C$

$\Delta T = 0.55^0C$

now by above equation

$Q = 100 \times 4000 \times 0.55$

$Q = 220,000 J$

now in order to evaporate water the heat is given as

$Q = mL$

$220000 = m \times 2.25 \times 10^6$

$m = 0.097 kg$

$m = 97 g$

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3 years ago

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A magnetic field has a magnitude of 0.078 T and is uniform over a circular surface whose radius is 0.10 m. The field is oriented

oee [108]

Answer:

Magnetic flux, $\phi=2.22\times 10^{-3}\ Wb$

Explanation:

It is given that,

Magnitude of the magnetic field, B = 0.078 T

Radius of circular loop, r = 0.1 m

The field is oriented at an angle of θ = 25° with respect to the normal to the surface. The magnetic flux through the surface is given by :

$\phi=BA\ cos\theta$

$\phi=0.078\times \pi \times (0.1)^2\ cos(25)$

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4 years ago

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We use the radioactive decay equation for this problem which is expressed as:

An = Aoe^-kt

An is the remaining amount after time t, Ao is the initial amount and k is a constant.

First, we determine the k from the half life as follows:

An/Ao = 1/2 = e^-k(14.4)
k = 0.04814

Then, we can calculate An after 28.8 yr.

An = 1000 e^-0.04814(28.8)
An = 250 g

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3 years ago

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You are asked to help design a new type of loop-the-loop ride. Instead of rolling down a long hill to generate the speed to go a

Trava [24]

Answer

The answer and procedures of the exercise are attached in the following archives.

Step-by-step explanation:

You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.

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4 years ago

Say the tortoise and the hare are racing. If the tortoise moves straight

Rina8888 [55]

Explanation:

It's displacement would be negative

displacement is a vector quantity.

'Backwards', we can assume, would be negative.

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