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4 years ago

WILL GIVE 5 STARS!!!! HELP ASAP!!!!

Physics

1 answer:

Lady_Fox [76]4 years ago

8 0

Answer:

Mollusks

Explanation:

The shear concentration of fossilized mollusks can be explained by the ability of their shells which are comprised primarily of calcium, allowing the hard shells remain and become fossilized long after the animal has decomposed.

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Can magnets move other objects from a distance

miv72 [106K]

Answer:

A is an object that attracts certain other

materials, particularly iron and steel. SO yes

Explanation:

3 0

3 years ago

Compare and contrast power and work.

cestrela7 [59]

Answer:

Comparison

Displacement and force are factors of both work and power

Work=Force× Displacement

power=(Force×Displacement)/time

Therefore power is the derivative of work with respect to time.

Contrast

Work is defined as a product of force and distance while power is the rate at which the work is done.

6 0

4 years ago

The motor of a four wheeler traveling along a muddy trail generates an average power of 7.48 104 W when moving at a constant spe

Radda [10]

Answer:

The tension in the tow rope pulling the log is 784.61 N

Explanation:

Given:

v = speed = 13 m/s

Pf = final power when the log is pulled = 8.5x10⁴W

Pi = average power = 7.48x10⁴W

The force required to move a car is equal to:

$F_{i} =\frac{P_{i} }{v} =\frac{7.48x10^{4} }{13} =5753.85 N$

$F_{f} =\frac{P_{f} }{v} =\frac{8.5x10^{4} }{13} =6538.46 N$

T = Ff - Fi = 6538.46 - 5753.85 = 784.61 N

7 0

4 years ago

Read 2 more answers

A Ferris wheel with 60 spokes has a diameter of 100 m. It makes one rotation every 60 seconds. Find the speed of the passengers

Doss [256]

Answer:

The speed of the passengers is 5.24 m/s

Explanation:

Uniform Circular Motion

It occurs when an object in a circular path travels equal angles in equal times.

The angular speed can be calculated in two different ways:

$\displaystyle \omega=\frac{v}{r}$

Where:

v = tangential speed

r = radius of the circle described by the rotating object

Also:

$\omega=2\pi f$

Where:

f = frequency

Since the frequency is calculated when the number of revolutions n and the time t are known:

$\displaystyle f=\frac{n}{t}$

The Ferris wheel has a diameter of 100 m and makes n=1 rotation in t=60 seconds, thus the frequency is:

$\displaystyle f=\frac{1}{60}\ Hz$

The angular speed is:

$\displaystyle \omega=2\pi \frac{1}{60} =\frac{\pi}{30} \ rad/s$

Now we calculate the tangential speed, solving this formula for v:

$\displaystyle \omega=\frac{v}{r}$

$v=\omega . r$

The radius is half the diameter, r=100/2=50 m:

$\displaystyle v=\frac{\pi}{30} . 50$

Calculating:

v = 5.24 m/s

The speed of the passengers is 5.24 m/s

7 0

3 years ago

What conventions are used in SI to indicate units

klemol [59]

Answer:

Conventions used in SI to indicate units are as follows:

Only singular form of units are used. for example: use kg and not kgs.
Do not use full stop after the abbreviations of any unit. for example: do not use kg. or cm.
Use one space between last numeric digit and SI unit. for example: 10 cm, 9 km.
Symbols and words should not be mixed. for example: use Kilogram per cubic and not kilogram/m3.
While writing numerals, only the symbols of the units should be written. for example: use 10 cm and not Ten cm.
Units named after a scientist should be written in small letters. for example: newton, henry.
Degree sign should not be used when the kelvin unit is used. for exmaple: use 37° and not 37°k

5 0

3 years ago