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katen-ka-za [31]
3 years ago
10

Jamal is testing the effect of four different fertilizers on a particular plant. For his experiment, Jamal obtained twenty ident

ical plants. He placed the plants in identical pots, exposed them to the same amount of sunlight each day, and gave them the same amount of water. Every week for twelve weeks, Jamal gave the plants equal amounts of fertilizer. Four plants received fertilizer W, four plants received fertilizer X, four plants received fertilizer Y, four plants received fertilizer Z, and four plants didn't receive any fertilizer at all. At the end of each week, Jamal measured the height of each plant and recorded his data in a table. His data for week five appears below. Fertilizer Trial 1 Trial 2 Trial 3 Trial 4 None 7 cm 8 cm 8 cm 7 cm W 8 cm 7 cm 8 cm 7 cm X 10 cm 12 cm 11 cm 10 cm Y 5 cm 6 cm 5 cm 5 cm Z 10 cm 4 cm 7 cm 9 cm At the end of week five, Jamal concluded that fertilizers X and Z improved the growth rate of his plants. Which trials led Jamal to this conclusion? A. trials 1 and 4 for fertilizer X and all trials for fertilizer Z B. trials 2 and 3 for fertilizer X and trials 1 and 4 for fertilizer Z C. all trials for fertilizer X and trials 1 and 4 for fertilizer Z D. all trials for both fertilizer X and fertilizer Z
Physics
2 answers:
Ivanshal [37]3 years ago
7 0

Answer:

C. all trials for fertilizer X and trials 1 and 4 for fertilizer Z

Explanation:

Plants without fertilizer had a height of 7 cm or 8 cm. Taking these values as a reference, from the table we can see that fertilizer W has no effect, fertilizer Y has a negative effect (heights are below the reference), fertilizer X has a positive effect (heights are above the reference),  and fertilizer Z has a positive effect in trials 1 and 4 and a negative effect in trials 2 and 3, that suggest this fertilizer is not as effective as fertilizer X, even though, it is concluded that it improved the growth rate of the plants given that it had a positive effect in some trials.

Mashcka [7]3 years ago
3 0

the answer is C Explanation:i just had this question

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Here, we are required to find the relationship between balls of different mass(a measure of weight) and different volumes.

  • 1. Ball A will have the greater density
  • 2. Ball C and Ball D have the same density.
  • 3. Ball Q will have the greater density.
  • 4. Ball X and Y will have the same density

The density of an object is given as its mass per unit volume of the object.

Mathematically;.

  • Density = Mass/Volume.

For Case 1:

  • Va = Vb and Ma = 2Mb
  • D(b) = (Mb)/(Vb) and D(a) = 2(Mb)/Vb
  • Therefore, the density of ball A,
  • D(a) = 2D(b).
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For Case 2:

  • Vc = 3Vd,

  • Vd = (1/3)Vc

  • Md = (1/3)Mc

  • D(c) = (Mc)/(Vc) and D(d) = (1/3)Md/(1/3)Vd

  • D(c) = D(d).

  • Therefore, ball C and D have the same density

For Case 3:

  • Vp = 2Vq and Mp = Mq
  • D(p) = (Mq)/2(Vq) and D(q) = (Mq)/Vq
  • Therefore, the density of ball P is half the density of ball Q
  • Therefore, ball Q has the greater density.

For case 4:

  • Mx = (1/2)My
  • Vx = Vy

Therefore, Ball X and Ball Y have the same density.

Read more:

brainly.com/question/18110802

8 0
3 years ago
The ability to store electrical energy is called<br><br> Voltage <br> Capacitance
NARA [144]
Hey!!

here is your answer>>>

Volaltage = It is the power to push the electrons

Capacitance = The ability to store electrical energy!.

Hope my answer helps!
5 0
3 years ago
Two charges +q and -q are situated at certain distance, at the point exactly midway betwee them what happens on electric field a
Luden [163]

Answer: Electric field is not zero but potential is zero

Explanation:

In science, charge, also recognized as electric charge, electrical charge, or electrostatic charge and expressed q, is a component of a unit of body that reveals the extent to which it has more or fewer electrons than protons.

Considering the direction of the electric field is of positive to negative charge. Therefore, it determination be toward due −q also due to both the charges.

But for potential, it is a scalar quantity, so the sum of potential due to all the charges will be zero.

Henceforth, the option (c) Electric field is not zero but potential is zero is the correct answer.

a incorect

From the above statements, we could conclude that option (c) Electric field is not zero, but potential is zero is the correct answer. So, the option (a) Electric field and potential both are zero is an incorrect solution.

b incorect

Among all the options, the option (c) Electric field is not zero but potential is zero is the correct answer.

Therefore, the option (b) Electric field is zero but potential is not zero is an incorrect solution

d) is incorrect

It has been explained that the option (c) Electric field is not zero but potential is zero is the correct answer.

Hence, the option (d) Electric field is not zero but potential is zero is an incorrect solution.

7 0
3 years ago
When a mass of 0.350 kg is attached to a vertical spring and lowered slowly, the spring stretches 12.0 cm. The mass is now displ
Ray Of Light [21]

Answer:

period of oscillations is 0.695 second

Explanation:

given data

mass m = 0.350 kg

spring stretches x = 12 cm = 0.12 m

to find out

period of oscillations

solution

we know here that force

force = k × x   .........1

so force = mg =  0.35 (9.8)  = 3.43 N

3.43 = k × 0.12

k = 28.58 N/m

so period of oscillations is

period of oscillations = 2π × \sqrt{\frac{m}{k} }   ................2

put here value

period of oscillations = 2π × \sqrt{\frac{0.35}{28.58} }  

period of oscillations = 0.6953

so period of oscillations is 0.695 second

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Liquid is the answer

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