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
Alona [7]
3 years ago
9

What is the rue of experimental designs that are used in scientific research?

Physics
1 answer:
Tema [17]3 years ago
8 0
There are three basic types of experimental research designs . ... True experimental designs are characterized by the random selection of participants and the random assignment of the participants to groups in the study. The researcher also has complete control over the extraneous variables.
You might be interested in
I got the correct answer, but I don't know what I did. Why is the answer E?
MariettaO [177]

Explanation:

Displacement is the straight line distance from the starting position to the final position.

Person X walks halfway around circle.  So her displacement is 100 m.

Person Y walks 3/4 of the way around.  So his displacement is 50√2 m ≈ 70.7 m.

Person Z walks completely around the circle, so their displacement is 0 m.

Therefore:

Z < Y < X

6 0
3 years ago
A 2.00 kg ball is thrown upward at some unknown angle from the top of a 20.0 m high building. If the initial magnitude of the ve
Charra [1.4K]

Answer: 28.1

Explanation:

5 0
3 years ago
A friend asks you how much pressure is in your car tires. You know that the tire manufacturer recommends 30 psi, but it's been a
Rama09 [41]

Answer:

21 psi

Explanation:

The weight of the car is:

W = mg

W = 1000 kg * 9.8 m/s²

W = 9800 N

Divided by 4 tires, each tire supports:

F = W/4

F = 9800 N / 4

F = 2450 N

Pressure is force divided by area, so:

P = F / A

P = (2450 N) / (0.13 m × 0.13 m)

P ≈ 145,000 Pa

101,325 Pa is the same as 14.7 psi, so:

P ≈ 145,000 Pa × (14.7 psi / 101,325 Pa)

P ≈ 21 psi

3 0
3 years ago
I need help please somebody help me
Morgarella [4.7K]

Answer:

Generally, magnets are attracted to objects that are made of the metals iron, nickel, or cobalt. These materials are called ferromagnetic materials. ... When all or most of the domains are aligned in the same direction, the whole object becomes magnetized in that direction and becomes a magnet.

Explanation:

5 0
2 years ago
Describe two forms of energy-efficient transportation.
vodka [1.7K]
Electricity which may efficient transportation if you develop your way depending contact metal basis , such as electric train .

-Water is from of heat-energy using solar power which run a turbine may be wheel on a railway path.
6 0
3 years ago
Other questions:
  • A man pulls on his dog's leash to keep him from running after a bicycle. Which term best describes this example?
    9·2 answers
  • HELP!!! When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physical cha
    7·1 answer
  • What is the displacement of an object that moves from the origin to a position at - 12m​
    12·2 answers
  • What do we call the combination of all food chains in a given ecosystem
    8·1 answer
  • as the trait is dominant and controlled by a single gene,the mutation must have occurred on both diploid copies. true or false?
    11·1 answer
  • Give me 1 example of complete inelastic collision​
    6·1 answer
  • When you put the iron cube in the olive oil and the brick cube in the water what loses heat more quickly and why? The oil or the
    11·1 answer
  • Find the expression for pressure exerted by fluid with proper description​
    10·1 answer
  •  Why are radio waves safer to humans than X- Rays
    8·1 answer
  • Determine the unbalanced force necessary to accelerate a 2.60 kg object at a rate of 14.0 m/s².
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!