1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
soldier1979 [14.2K]
3 years ago
9

A student conducted an experiment that used two rose plants to determine if a liquid formula for fertilizer was better than a dr

y formula. He tested each fertilizer on a single plant for one month, and he concluded that the liquid formula was better. When he described his conclusion to his teacher, she told him he needed to conduct additional trials. The teacher most likely asked for additional trials because A.she did not believe the new formula helped plants grow better than the old formula. B.it was necessary to see data from more plants before the conclusion could be accepted. C.it was necessary to have tested the fertilizer on different kinds of plants. D.she thought he should test additional fertilizer formulas on the same two plants.
Physics
1 answer:
Serga [27]3 years ago
4 0
B. it was necessary to see data from more plants before the conclusion could be accepted.
You might be interested in
Give 2 reasons for fitting heavy commercial vehicles with many tyres​
forsale [732]
Better weight distribution and more stability
4 0
2 years ago
An alpha particle (a helium nucleus, consisting of two protons and two neutrons) has a radius of approximately 1.6 × 10-15 m. A
Snezhnost [94]

Answer:

9.96x10^-20 kg-m/s

Explanation:

Momentum p is the product of mass and velocity, i.e

P = mv

Alpha particles, like helium nuclei, have a net spin of zero. Due to the mechanism of their production in standard alpha radioactive decay, alpha particles generally have a kinetic energy of about 5 MeV, and a velocity in the vicinity of 5% the speed of light.

From this we calculate the speed as

v = 5% 0f 3x10^8 m/s (speed of light)

v = 1.5x10^7 m/s

The mass of an alpha particle is approximately 6.64×10−27 kg

Therefore,

P = 1.5x10^7 x 6.64×10^−27

P = 9.96x10^-20 kg-m/s

8 0
3 years ago
During convection, heat warms up a fluid, making the fluid less dense so it begins to RISE. As the warm fluid moves, it begins t
Fiesta28 [93]

Answer:

True

Explanation:

Convection is a form of heat transfer that is predominantly common in fluids especially liquid and gas.

It occurs by the movement of a part of substance from one place to another based on density and temperature differences.

A typical convection cell is made up of a liquid that is heated. The liquid part close to the heat source becomes warmer and rises due to its low density. The part away from the heat source is more dense and begins to sink.

This analogy is commonly demonstrated in a boiling pot of water.

7 0
3 years ago
Read 2 more answers
How and why will my weight change if i took a trip to the moon
MatroZZZ [7]

weight less on moon than on earth.

high on lift off - G force

low in orbit.

zero at a point between earth and moon

7 0
3 years ago
Read 2 more answers
What is SI unit for distance
Dafna11 [192]

Answer:

meter

The SI unit of distance and displacement is the meter [m].

Explanation:

have advancedd

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which unit of a measurement is better for determining the volume for a drop of water. A milliliter, or a liter?
    5·1 answer
  • Acoustic encoding is the encoding of <br> images<br><br> sounds<br><br> meanings<br><br> acronyms
    8·2 answers
  • A certain lightning bolt moves 40.0 C of charge. How many fundamental units of charge |qe| is this?
    13·2 answers
  • What is responsible for creating distinct weather patterns?
    11·1 answer
  • George walks to a friend's house. He walks 750 meters North, then realizes he walked
    9·1 answer
  • Margy is trying to improve her cardio endurance by performing an exercise in which she alternates walking and running 100.0 m ea
    6·1 answer
  • Can someone help me match the words?
    13·1 answer
  • What type of metals are known as ferromagnetic metals
    12·1 answer
  • Sally and Sam are in a spaceship that comes to within 16,000 km of the asteroid Ceres. Determine the force Sally experiences, in
    9·1 answer
  • A cyclist accelerates from 0m/s to 8m/s in 3 seconds.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!