One student did an experiment with sand, rocks, pebbles, and water. The steps of the experiment are shown below.

1 answer:

3 0

The intended observation in this experiment is to check the flow of water through the cotton cloth when pouring the water through different material (sand, rocks and pebbles).
We will observe that the rate of water flow changes depending on which material it is flowing through.
The used materials in this experiment (sand, rocks and pebbles) are the same as those forming different layers of the earth.

Therefore, based on the above explanation, we can infer that the best answer is:
D. groundwater moves at different rates through different layers of the Earth

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At what distance above earth would a satellite have a period of 125 min?

Nezavi [6.7K]

Rw^2 = GmM/r^2
 Leads to
 w^2 r^3 = GM
 (2pi /T) ^2 r^3 = GM
 4pi^2 r^3 = GM T^2
 r^3 = GM T^2 / 4pi^2
 Work out r^3 then r.
 T = 125 min = 125(60) = 7500 s
 R = 6.38E6 m
 m = 5.97E24 kg
 G = 6.673E-11
 r= 8279791.78 m
Since r = radius R of Earth + height above urface,h
 h = r - R = 8279791.78 - 6.38E6 = 1899791.78 m
h= 1899.79178 Km

5 0

2 years ago

Read 2 more answers

the temperature of a 2.0-kg increases by 5*c when 2,000 J of thermal energy are added to the block. What is the specific heat of

nata0808 [166]

To calculate the specific heat capacity of an object or substance, we can use the formula

c = E / m△T

Where
c as the specific heat capacity,
E as the energy applied (assume no heat loss to surroundings),
m as mass and
△T as the energy change.

Now just substitute the numbers given into the equation.

c = 2000 / 2 x 5
c = 2000/ 10
c = 200

Therefore we can conclude that the specific heat capacity of the block is 200 Jkg^-1°C^-1

3 0

2 years ago

Calculate the number of moles in each of the following masses: 0.039 g of palladium 0.0073 kg of tantalum

marysya [2.9K]

Answer:

The number of moles of palladium and tantalum are 0.00037 mole and 0.0000404 mole respectively

Explanation:

Number of mole = reacting mass/molar mass

n = R.m/m.m......................... Equation 1

Where n = number of moles, R.m = reacting mass, m.m = molar mass.

For palladium,

R.m = 0.039 g and m.m = 106.42 g/mol