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
Inessa05 [86]
3 years ago
13

Which statement describes a controlled experiment?

Physics
1 answer:
olga_2 [115]3 years ago
7 0

Answer:

In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.

You might be interested in
A 3.0-A current is maintained in a simple circuit that consists of a resistor between the terminals of an ideal battery. If the
harina [27]

Answer:

R=2.78\ \Omega

Explanation:

Given that,

The current flowing in the circuit, I = 3 A

The power of the battery, P = 25 W

We need to find the resistance of the battery. We know that the power of the battery is given by the formula as follows :

P=I^2R

Put all the values to find R.

R=\dfrac{P}{I^2}\\\\R=\dfrac{25}{(3)^2}\\\\R=2.78\ \Omega

So, the resistance is equal to 2.78\ \Omega.

7 0
2 years ago
Can anyone help me with this question please​
JulsSmile [24]

Explanation:

V=u+at

where,

v=final speed

u=initial speed,(starting speed)

a=acceleration

t=time

  1. v=u+at = 6=2+a*2

6=2+2a

2a=6-2

2a=4

a=4/2 = 2

a =2

2. to find time taken

v=u+at

25=5*2t

2t=25-5

2t=20

t=20/2

t=10sec

3. finding final speed

v=u+at

v=4+10*2

=4+20

v=24m/sec

5.v=u+at

=5+8*10

=5+80

V=85m/sev

6. v=u+at

8=u+4*2

8=u+8

U=8/8

u=1

these are your missing values

5 0
3 years ago
A room has a wall with an R value of 18 F sq.ft. hr/BTU. The room is 15 feet long and 11 feet wide with walls that are 9 ft high
seropon [69]

Answer:

The heat transferred through the wall that day is  13728 BTUs

Explanation:

Here, we have the area of the wall given as

Area of wall = 2 × Length × Height + 2 × Width × Height

Length = 15 feet

Width = 11 Feet and

Height = 9 feet

Therefore, the area = 2×15×9 + 2×11×9 = 468 ft²

Temperature difference is given by

Average outside temperature - Wall temperature = 40 - 18 = 22 °F

Therefore the heat transferred through the wall that day (24 hours) at 18 sq.ft. hr/BTU is given by;

468 × 22 × 24/18 = 13728 = 13728 BTUs.

5 0
3 years ago
Which constants and directions always apply when using gravity?​
Lostsunrise [7]

Answer:

.

Explanation:

6 0
2 years ago
Read 2 more answers
Es muy urgente porfavor! ( solo me teneis que ayudar a sacar el apartado d,e y f porfavor!
Luba_88 [7]
I don’t know español
3 0
2 years ago
Other questions:
  • A(n)________is a substance that is made up of a single kind of atom.
    9·1 answer
  • A 1,700 kg car is being used to give a 1,400 kg car a push start by exerting a force of
    8·1 answer
  • What amount of heat is required to raise the temperature of 25 grams of copper to cause a 15ºC change? The specific heat of copp
    7·1 answer
  • Electric field lines point from positive charges to negative charges. A. True B. False​
    15·1 answer
  • Which of these circuit schematics has an ammeter?<br> Α. Α<br> B. B<br> C. C<br> D. D
    5·2 answers
  • I need help it is about physics
    8·2 answers
  • Which roots are better underwater , taprroots or fibrous?
    9·1 answer
  • PLEASE help its timed..
    5·1 answer
  • Why doesn't the arrow fly forever
    5·1 answer
  • (2) Put 5kg mass at left side (at 2m). This is fixed throughout the experiment! (3) Try to balance by putting 5kg mass at the ri
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!