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Nuetrik [128]
3 years ago
9

2. Karen wants to know where in her garden a basil plant will grow the best. She thinks a basil plant will grow best in the corn

er of the garden that gets the most sunlight. To test her hypothesis, she decided to plant several groups of basil in her garden.
Which of the following variables should Karen change from one group of basil plants to the next?
A. the amount of water she gives the plants
B. the location of the plants
C. the height of the plants
D. the type of plants
Physics
1 answer:
Stolb23 [73]3 years ago
3 0

Since she is testing where the plant would grow best, the type, height and amount of water does not help the original question. Only moving the plants will help her determine where to plant the basil plants. Option B. the location of the plants

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17. In which layer does mantle convection occur?
Anarel [89]

Answer:

D. Asthenosphere

Explanation:

The asthenosphere is relatively plastic part of the mantle which underlies the brittle lithosphere. In the asthenosphere, it is generally believed that the rocks are in ductile state and easily moves. It is the site of convection within the earth. In mantle convection, hot and light materials rises and keeps moving into upper crustal levels till they solidify. Here also, cold and denser materials sinks deeper till they turn to melt. This differences in temperature and density sets up a convective cell within the mantle. Several convective cells are in the mantle.

8 0
3 years ago
Which of these formulas represents 1 atom of sodium (Na) chemically combined with another element?
Andru [333]
The answer is B. because NaCl are just two elements with one atom from each element
3 0
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A night lamp uses a 30 W bulb. If it is left on continuously for 8 hours, how much energy will it use?
fiasKO [112]
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By what order of magnitude is something that runs in nanoseconds faster than something that runs in milliseconds?
maksim [4K]

To solve this problem we will define the order of magnitude of both points, then we will obtain the radius and obtain the conclusion of the order of magnitude.

A nanosecond is one billionth of a second while and a millisecond is one millionth of a second

\frac{\text{millisec}}{\text{nanosec}} = \frac{10^{-3}}{10^{-9}} = 10^6

Therefore something that runs in nanoseconds is six times faster than something that runs in milliseconds

5 0
3 years ago
Huck Finn walks at a speed of 0.70 m/sm/s across his raft (that is, he walks perpendicular to the raft's motion relative to the
exis [7]

Answer:

Explanation:

Given

Velocity of Huck w.r.t to raft v_{H,raft}=0.7\ m/s

Perpendicular to the motion of raft

Velocity of Raft in the river v_{raft,river}=1.6\ m/s

As Huck is traveling Perpendicular to the raft so he possess two velocities i.e. vertical velocity and horizontal velocity of River when observed from bank

v_{Huck,river\ bank}=0.7\hat{j}+1.6\hat{i}

So magnitude of velocity is given by

|v|=\sqrt{0.7^2+1.6^2}

|v|=\sqrt{0.49+2.56}

|v|=\sqrt{3.05}

|v|=1.74\ m/s

For direction \tan =\frac{0.7}{1.6}=0.4375

\theta =23.63^{\circ} w.r.t river bank

                       

4 0
3 years ago
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