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
aliya0001 [1]
3 years ago
9

Chandra is doing an experiment to find out which type of dog food her dog prefers. The following are the steps of her experiment

:
1. Place five identical bowls next to each other in the dog's yard.

2. Place a different type of dog food into each bowl.

3. Observe which foods the dog eats and how much of it he eats.

4. Record all observations.

5. Repeat the experiment at the same time every day for the next week.

6. Analyze the results.

Which variable did Chandra change in the experiment?
A.
the type of dog food
B.
the dog food bowl
C.
the time of day the dog was fed
D.
the type of dog
Physics
1 answer:
ELEN [110]3 years ago
8 0

Answer:

A the type of dog food because it was different and every other thing was the same.

You might be interested in
A charge -353e is uniformly distributed along a circular arc of radius 5.30 cm, which subtends an angle of 48°. What is the line
vladimir2022 [97]

Answer:

- 1.3 x 10⁻¹⁵ C/m

Explanation:

Q = Total charge on the circular arc = - 353 e = - 353 (1.6 x 10⁻¹⁹) C = - 564.8 x 10⁻¹⁹ C

r = Radius of the arc = 5.30 cm = 0.053 m

θ = Angle subtended by the arc = 48° deg = 48 x 0.0175 rad = 0.84 rad        (Since 1 deg = 0.0175 rad)

L = length of the arc

length of the arc is given as

L = r θ

L = (0.053) (0.84)

L = 0.045 m

λ = Linear charge density

Linear charge density is given as

\lambda =\frac{Q}{L}

Inserting the values

\lambda =\frac{-564.8\times 10^{-19}}{0.045}

λ = - 1.3 x 10⁻¹⁵ C/m

4 0
3 years ago
An electron passes through a point 2.83 cm 2.83 cm from a long straight wire as it moves at 35.5 % 35.5% of the speed of light p
igor_vitrenko [27]

Answer:

The magnitude of electron acceleration is 2.34 \times 10^{15} \frac{m}{s^{2} }

Explanation:

Given:

Distance from the wire to the field point r = 2.83 \times 10^{-2} m

Speed of electron v = 35.5 \%c

Current I = 17.7 A

For finding the acceleration,

First find the magnetic field due to wire,

  B = \frac{\mu _{o}I }{2\pi r }

Where \mu_{o} = 4\pi   \times 10^{-7}

  B = \frac{4\pi \times 10^{-7}  \times 17.7 }{2\pi (2.83 \times 10^{-2} ) }

  B = 12.50 \times 10^{-5} T

The magnetic force exerted on the electron passing through straight wire,

  F = qvB  

  F = 1.6 \times 10^{-19} \times 0.355 \times 3 \times 10^{8} \times 12.50 \times 10^{-5}

  F = 21.3 \times 10^{-16} N

From the newton's second law

  F = ma

Where m = mass of electron = 9.1 \times 10^{-31} kg

So acceleration is given by,

   a = \frac{F}{m}

   a = \frac{21.3 \times 10^{-16} }{9.1 \times 10^{-31} }

   a = 2.34 \times 10^{15} \frac{m}{s^{2} }

Therefore, the magnitude of electron acceleration is 2.34 \times 10^{15} \frac{m}{s^{2} }

7 0
2 years ago
A bar magnet was placed underneath a sheet of paper where a pile of iron filings sits. In the presence of the energy stored in t
Naya [18.7K]

Answer: 1. The field energy will increase

2. The energy increases, and the lines of force are denser

3. It points toward the field of earths magnetic poles

4. 1 and 2 only

5. 2, 4, 1, 3

Explanation: just took it

4 0
2 years ago
What is an example of a invertebrate that doesn’t have an exoskeleton?
Tatiana [17]

<em><u>Invertebrat</u></em><em><u>e</u></em><em><u> </u></em><em><u>means</u></em><em><u> </u></em><em><u>those</u></em><em><u> </u></em><em><u>organism</u></em><em><u> </u></em><em><u>which</u></em><em><u> </u></em><em><u>doesnot</u></em><em><u> </u></em><em><u>have</u></em><em><u> </u></em><em><u>backbone</u></em><em><u> </u></em><em><u>in</u></em><em><u> </u></em><em><u>their</u></em><em><u> </u></em><em><u>body</u></em><em><u> </u></em><em><u>.</u></em><em><u>Some</u></em><em><u> </u></em><em><u>of</u></em><em><u> </u></em><em><u>t</u></em><em><u>he</u></em><em><u> </u></em><em><u>examples</u></em><em><u> </u></em><em><u>are</u></em><em><u>:</u></em>

<em><u>1</u></em><em><u>.</u></em><em><u>S</u></em><em><u>p</u></em><em><u>i</u></em><em><u>d</u></em><em><u>e</u></em><em><u>r</u></em>

<em><u>2</u></em><em><u>.</u></em><em><u>e</u></em><em><u>a</u></em><em><u>r</u></em><em><u>t</u></em><em><u>h</u></em><em><u>w</u></em><em><u>o</u></em><em><u>r</u></em><em><u>m</u></em>

<em><u>3</u></em><em><u>.</u></em><em><u>S</u></em><em><u>t</u></em><em><u>a</u></em><em><u>r</u></em><em><u>f</u></em><em><u>i</u></em><em><u>s</u></em><em><u>h</u></em>

<em><u>4</u></em><em><u>.</u></em><em><u>S</u></em><em><u>e</u></em><em><u>a</u></em><em><u> </u></em><em><u>urchins</u></em><em><u>.</u></em>

<em><u>hope</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>will</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>lot</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

5 0
3 years ago
Read 2 more answers
Why do fundamental needs form the foundation of Maslow’s hierarchy
GrogVix [38]

Answer:

After we satisfy our basic needs, they no longer serve as motivators and we can begin to satisfy higher-order needs. Maslow organized human needs into a pyramid that includes (from lowest-level to highest-level) physiological, safety, love/belonging, esteem, and self-actualization needs.

Explanation:

6 0
2 years ago
Other questions:
  • How is temperature related to kinetic energy
    14·1 answer
  • Estimate the total mass of the Earth’s atmosphere. (The radius of the Earth is 6.37 3 106 m, and atmospheric pressure at the sur
    8·1 answer
  • How many electrons make up a charge of - 30.0 μc?
    14·2 answers
  • Why does alternating current change direction 50 to 60 times per second?
    10·2 answers
  • The total energy in a substance as a result of the motion and position of all the particles is _________. a. heat b. temperature
    8·1 answer
  • Drag the tiles to the correct boxes to complete the pairs.
    5·2 answers
  • If a force is exerted on an object, is it possible for that object to be moving with constant velocity?
    7·1 answer
  • Si se arroja una ròca en sentido horizontal desde un barranco de 100 m de altura. Choca
    8·1 answer
  • Two spherical objects have masses of 100 kg and 200 kg. Their centers are
    7·1 answer
  • What is science ? what qualities do we deal in deal in physic ? ​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!