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kotykmax [81]
3 years ago
5

WILL GIVE 5 STARS!!! HELP ASAP PLEASE

Physics
1 answer:
Crank3 years ago
3 0

Answer:

C. were formed from plants which did not have time to decay

Explanation:

Coal beds are formed from plants which did not have time to decay. They usually form in an anoxic environment where oxygen is lacking and there is abundant plant matter.

The best place where coal beds can form is in a swamp.

Rapid burial of the plant matter without reacting with oxygen maintains the carbon content and the chemical energy they hound.

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When you stretch a spring 33 cm past its natural length, it exerts a force of 6 N. What is the spring constant of this spring?
PilotLPTM [1.2K]

The spring formula:

       Force =  - (spring constant) · (distance stretched or squashed)

          
6 N  =  - (spring constant) · (33 cm)

                   =  - (0.33 m) · (spring constant)

          Spring constant  =   - (6 N) / (0.33 m)

                                      =    - 18.18 N/meter .

The negative signs means that the spring always wants to go in the
opposite direction from where you forced it, and return to its relaxed
length.  If you stretch it, it tries to get shorter, and if you compress it,
it tries to get longer.
6 0
3 years ago
Read 2 more answers
A closed box is filled with dry ice at a temperature of -94.7°C, while the outside temperature is 26.8°C. The box is cubical, me
Nikitich [7]

Answer:

Explanation:

3.64 x 10⁶ J passes through 6 walls

heat energy passing through 1 wall = 0.606 x 10⁶ J

Surface Area of 1 wall A = .285² = 0.081225 m²

Temperature Difference = T₁ - T₂ = 26.8 + 94.7 = 121.5

Thickness of wall d = 3.75 x 10⁻² m

Rate of heat flow per second R = \frac{0.606 \times10^6}{24\times60\times60}

=7.01 J per s.

Formula for rate of heat flow

R = \frac{KA(T_1-T_2)}{d}

Where K is thermal conductivity.

7.01 = \frac{K\times121.5\times.081225}{3.75\times10^{-2}}

K = 2.66 X 10⁻² W m⁻¹s⁻¹

8 0
3 years ago
If your dream is to be a soccer player. You got skills and one day it was your time to go to a another country but your family d
KengaRu [80]
Weigh the negatives and positives and think if it's worth it or not
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3 years ago
beth walked to the school in 80 seconds from a position 100 m west of the school. what was her velocity?
Ugo [173]
1.8 meters a second

100/80
4 0
3 years ago
Justin, with a mass of 30 g, is going down a 8.0 m high water slide. he starts at rest, and his speed at the bottom is 11 m/s. h
mr Goodwill [35]
<span>The thermal energy is the work done by friction. If Justin is at rest intially, his potential energy is MGH. Hence we have 30* 9.8*8 = 2352N. Where m is mass, g accleration due to gravity, and h is the height. When he gets to the bottom of the slide, his potential energy is converted to usable kinetic energy, so we have 1/2 mv^2. We end up with 1/2 * 30 * (11)^2 = 1815N. He started with 2352N and ended up with 1815N. Hence the thermal energy is 2352 - 1815 = 537N.</span>
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4 years ago
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