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3 years ago

Select all of the answers that apply.

Physics

2 answers:

denis-greek [22]3 years ago

8 0

Answer:

Birds are just as widespread as mammals during this era.

There are no mammals present during this era.

Explanation:

aliina [53]3 years ago

3 0

The answer is There are no mammals present during this era. The studies revealed that animals on this era were mostly birds, reptiles, and amphibians. Birds were more dominantly known as the big predator animals in this period. It was only during the middle last part and late period of the Cenozoic period when the mammals came to populated and evolved. Also, it was the period when the man finally came.

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You have gathered green turtle hatchlings from a beach where the magnetic field strength is 50 μT and the dip angle is 56∘. You

svet-max [94.6K]

Answer:

Explanation:

Angle of dip = 56° , magnetic field strength = 50μT

Vertical component = 50 x sin 56 = 41.45 μT

Horizontal component = 50 cos 56 = 27.96μT

New field is added in vertical downwards direction to increase the vertical component so as to increase the angle of dip . Let this field be B

total vertical field = B + 41.45

Horizontal component = 27.96

dip angle be θ

tanθ = vertical component / horizontal component

tan62 = B + 41.45 / 27.96

1.88 = B + 41.45 / 27.96

52.58 = B + 41.45

B = 11.13 μT

Since magnetic field has to be added , current should be clockwise when looked from above.

8 0

3 years ago

X rays are used in hospital to locate in the patients bones.If the x rays of wavelength of 2×10 to the power negative nine m tra

jasenka [17]

Answer:1.5×10 to the power of 17(unit-Hertz/H)

Explanation:V=F×Wavelength

F=V/Wavelength=3×10 to power/2×10 to power of -9=1.5×10 to power of 17

8 0

3 years ago

An object is moving in a straight line along the y axis. As a function of time, its position is given by the equation y=3.0+4.8x

romanna [79]

Answer:

Explanation:

Instant Velocity and Acceleration

Give the position of an object as a function of time y(x), the instant velocity can be obtained by

$v(x)=y'(x)$

Where y'(x) is the first derivative of y respect to time x. The instant acceleration is given by

$a(x)=v'(x)=y''(x)$

We are given the function for y

$y(x)=3.0+4.8x +6.4x^2$

Note we have changed the last term to be quadratic, so the question has more sense.

The velocity is

$v(x)=y'(x)=4.8+12.8x$

And the acceleration is $a(x)=v'(x)=12.8$

5 0

4 years ago

The isobars in the conventional series that will be needed to complete the pressure analysis between the lowest and highest valu

Tresset [83]

The isobars in the conventional series that will be needed to complete the pressure analysis between the lowest and highest values on this map are: 1008, 1012, 1016, 1020.

To add, an isobar is a line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.

7 0

3 years ago

HELP HELP, this should be pretty easy Where does all of earth’s atmosphere energy come from

sp2606 [1]

Answer:The atmosphere directly absorbs about 23% of incoming sunlight, and the remaining energy is transferred from the Earth's surface by evaporation (25%), convection (5%), and thermal infrared radiation (a net of 5-6%).Jan

Explanation:

None

5 0

4 years ago