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s344n2d4d5 [400]
2 years ago
9

Joe wanted to experiment with different factors that affect the freezing rate of water. He put two cups of water into each of tw

o identical glass bowls. Next, he stirred sugar into the water in one of the bowls, and he put both bowls in the freezer. He checked their temperatures after one hour, and measured how much water was still liquid in each bowl. What was the variable that changed in this experiment? A. the amount of time each bowl was left in the freezer B. the amount of sugar mixed into each bowl C. the size and shape of each bowl D. the amount of water each bowl contained
Physics
2 answers:
creativ13 [48]2 years ago
7 0

the answer is not D ....... the answer is {B} if you got it right give me a 5 stars and a hard

djyliett [7]2 years ago
5 0

Answer:

B.  the amount of sugar mixed into each bowl

Explanation:

Both bowls were left the same amount of time, they have the same size and shape and a cup of water was poured into both of them. The only difference was that Joe stirred sugar into the water in only one of the bowls.

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Researchers interested in studying stress gave 150 high school seniors a very difficult math exam. After the test, the researche
belka [17]

Answer:

<u>Informed Consent- The study didn't conform this ethical standard.</u>

<u>Debriefing- The study conforms this ethical standard.</u>

<u>Confidentiality- The study conforms this ethical standard.</u>

<u>Protection from harm- The study conforms this ethical standard.</u>

Explanation:

<u>Informed consent</u> is described as a procedure whereby researchers tend to provide details about specific research they are going to conduct, the risk & benefits involved in the study, different alternatives involved in the procedure, etc.

<u>Debriefing </u>is described as a process that is being conducted in any of the different psychological research encompassing human participants after specific research is completed. The researcher tends to describe the details of the research to the participants.

<u>Confidentiality</u> is described as one of the different code of ethics followed by health workers or psychologists. While practicing confidentiality, a psychologist tends to promise his or her participants that he or she will keep everything a secret whatever is being discussed or shared between both of them.

<u>Protection from harm</u> determines that the psychologists conducting research follows the ethics in which he or she has to protect all the participants from any kind of harm.

4 0
1 year ago
Suppose a teenager puts her bicycle on its back and starts the rear wheel spinning from rest to a final angular velocity of 250
shtirl [24]

Answer: a) angular acceleration, a = 5.24rad/s^2

b) time taken for the wheel to stop, ∆t = 0.30s

Explanation:

All shown in the attachment.

3 0
2 years ago
You have a suspect on the run in a dry, wooded area; they’ve ditched the gun but are hiding from you. how long do you have to fi
erma4kov [3.2K]

Answer:

C. a few days

Explanation:

The evidence that we will have to investigate is the gunshot residue on the body of the suspect. When a person fires a gun there will be a deposition of material from the components of the chemicals present in the gun. This deposit is called gunshot residue and consists of particles of the propellant or explosive primer.

Experimentation has shown that the period of time that is person will test possible for gunshot residue is 5.27 days.

7 0
1 year ago
A fisherman is fishing from a bridge and is using a "50.0-N test line." In other words, the line will sustain a maximum force of
umka21 [38]

Answer:(a) 50 N

(b)38.34 N

Explanation:

Given

Maximum tension(T) in line 50 N

(a)If line is moving up with constant velocity i.e. there is no acceleration

This will happen when Tension is equal to weight of Fish

T-mg=0

T=mg

Maximum weight in this case will be 50 N

(b)acceleration of magnitude 2.98 m/s^2

T-mg=ma

50=m\left ( g+a\right )

50=m\left ( 12.78\right )

m=3.91

Therefore weight is 3.91\times 9.8=38.34 N

7 0
2 years ago
Temperature and kinetic energy are ___________ proportional. adirectly directly indirectly 2. Heat is a measure of _____________
Usimov [2.4K]

Explanation:

It is known that relation between kinetic energy and temperature is as follows.

        K.E \propto \frac{3}{2}kT

Hence, kinetic energy is directly proportional to temperature.

Thermal energy is defined as the energy present within the molecules of an object due to the motion of particles. Basically, thermal energy is internal energy of an object.

Thus, we can conclude that:

  • Temperature and kinetic energy are directly proportional.
  • Heat is a measure of thermal energy.
  • Temperature is proportional to the total kinetic energy.
7 0
2 years ago
Read 2 more answers
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