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BabaBlast [244]
3 years ago
13

In a series of rock layers, a geologist finds fossils of a pine trees and oak trees in layers that are 1.0 m and 1.5 m deep. How

ever, in a layer that is 2.0 m deep, he finds fossils of tropical plants and trees.
Which explains his findings?



A.


The ancient climate remained hot.


B.


The continent shifted toward the tropics.


C.


The continent remained in the tropics.


D.


The continent shifted toward the mid-latitudes and polar regions.
Physics
1 answer:
luda_lava [24]3 years ago
4 0
D. The only answer that explains that the climate of the region got cooler. Pine and oak trees reside in cooler areas that have the four seasons, meaning that the area got lost its tropic environment.
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small plastic container, called the coolant reservoir, catches the radiator fluid that overflowswhen the automobile engine becom
Ilia_Sergeevich [38]

Answer:

0.53 quart

Explanation:

The volume expansion of the coolant is gotten from ΔV = VγΔθ where ΔV   = change in volume of the coolant, V = initial volume of coolant = 15 quart, γ = coefficient of volume expansion of coolant = 410 × 10⁻⁶ /°C and Δθ = temperature change = θ₂ - θ₁ where θ₁ = initial temperature of coolant = 6 °C and θ₂ = final temperature of coolant = 92 °C. So, Δθ = θ₂ - θ₁ = 92 °C - 6 °C = 86 °C

Since, ΔV = VγΔθ

substituting the values of the variables into the equation, we have

ΔV = VγΔθ

ΔV = 15 × 410 × 10⁻⁶ /°C × 86 °C

ΔV = 528900 × 10⁻⁶ quart

ΔV = 0.528900 quart

ΔV ≅ 0.53 quart

Since the change in volume of the coolant equals the spill over volume, thus the overflow from the radiator will spill into the reservoir when the coolant reaches its operating temperature of 92 °C is 0.53 quart.

4 0
3 years ago
At a waterpark, sleds with riders are sent along a slippery, horizontal surface by the release of a large, compressed spring. Th
steposvetlana [31]

The sleds speed when the spring returns toits uncompressed length is v = 0.03 m/s.

<u>Explanation</u>:

Given,

force constant = 42 N/cm = 0.42 N/m,   mass m = 68 kg, spring x = 0.39 m

The potential energy, U, stored in the spring is

                     U = 1/2 kx^2  

                       = 1 / 2 \times 0.42 \times (0.39)^2

                       = 0.032 J

All its potential energy has been converted into kinetic energy since it has a uncompressed length.

                    K = 1/2 mv^2

                     v = sqrt (2K / m)

                       = √(( 2 \times 0.032) / 68)

                    v = 0.03 m/s .

4 0
4 years ago
WILL GIVE BRAINLIEST! In the nucleus of an atom, two protons are separated by a distance of 1*10^-15m. What is the magnitude of
tiny-mole [99]

Answer:

hi!

Explanation:

answer D.) 230 N

7 0
3 years ago
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Nadusha1986 [10]
E = 0.5mv^2 = 0.5*44*10^2 = 2200J
5 0
4 years ago
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A 60-watt light bulb has a voltage of 120 bolts applied across it and a current of 0.5 amperes flows through the bulb. What is t
Andre45 [30]

Answer:

240 ohms

Explanation:

From Ohms law we deduce that V=IR and making R the subject of the formula then R=V/I where R is resistance, I is current and V is coltage across. Substituting 120 V for V and 0.5 A for A then

R=120/0.5=240 Ohms

Alternatively, resistance is equal to voltage squared divided by watts hence \frac {120^{2}}{60}=240

7 0
3 years ago
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