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Deffense [45]
3 years ago
7

Forensic scientist Bennet asks his technician for the scalar quantity of fingerprints found at his crime scene. What would be th

e technician's most likely answer?
There were 13 fingerprints found at the crime scene.

There were fingerprints in the hallway facing the direction of the kitchen and fingerprints in the kitchen pointing toward the door handle.

There were individual prints dusted at the crime scene, but they have not been identified yet.

There were fingerprints found in the bedroom, some that look like they are sliding down the hallway, and prints leading to the refrigerator.
Biology
1 answer:
Norma-Jean [14]3 years ago
3 0

Answer:

first answer is correct

Explanation:

just took the test

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What is the electrical current passing through this ammeter?1
VMariaS [17]
Answer 1: 
Diagram is missing in question. Same is attached below.
Position of needle depicts amount of current flowing through the circuit. From the diagram, it can be seen that deflection needle is in between 8 amperes and 9 amperes. This signifies that, current is more than 8 amperes, but less than 9 amperes. Hence correct answer is option B: 8.5 amperes.


Answer 2: 
Diagram is missing in question. Same is attached below.
A wavelength is the distance between two successive troughs or two successive crests of the wave. Energy, frequency and wavelength of electromagnetic wavelengths are dependent on each other. In present case, X is a true measurement of the wavelenght. Hence, correct answer is option B: X.

Answer 3: 
Diagram is missing in question. Same is attached below.
Magnetic field strength is maximum where the magnetic field density is maximum. From the diagram, it can be seen that, in the region around both north pole and south pole, magnetic field density of identical, as well as very high. Hence, correct answer is option C: Around both poles.


Answer 4: 
<span>Alexandra was preparing to go on a hike in the woods. She gathered the equipment she would need and placed it on the counter. By chance, she placed her compass near an electrical outlet. Although the compass was not moving, the compass needle turned because the electrical current in the outlet produced a magnetic field. 
Reason: </span> When an electric current flows through a circuit, it generates the magnetic field around it. Due to this, the needle of compass got deflected, since it was in vicinity of magnetic field that was generated upon passage of electric current.


Answer 5: 
Diagram is missing in question. Same is attached below.
Correct answer is option B: Using the same number of turns of wire for each electromagnet. This is because, in order to study effect nails in the core of an electromagnet, it would be practical to use same number of batteries and same number of turns of wires in all the experiments. Thus, the variation in magnetism would be solely because of nails present in electromagnet.

Answer 6:
Ms. Markas takes a Thermos bottle filled with hot coffee to work each day. The thermos bottle keeps the coffee hot by slowing heat transfer from the inside to the outside of the container. This is because, thermos acts as in isolated system. An isolated system is one  which does not exchange heat as well as matter with surrounding. Due to this, coffee remains hot for long time.


Answer 7:
Correct answer: Option C-Black T-shirt
Reason: The radiation that is absorbed by the compound is dependent on the energy level separation between different electronic energy level. In energy level separation lies in visible region of electromagnetic radiation, then compound is colored. In case of black colour compounds, it absorbs light of all possible wavelenghts.

Answer 8: 
Diagram is missing in question. Same is attached below.
Correct answer: option B i.e. have a greater frequency than short wavelengths.
Reason:
We know that, E = hv = hc/∧
where, v = frequency of electromagnetic radiation
∧ = wavelenght.

From above equation, it can be seen that frequency and wavelenght have inverse relation. 
Therefore, long wavelengths have a greater frequency than short wavelengths.


Answer 9: 
 Refractive index is  the ratio of the velocity of light in a vacuum to its velocity in a specified medium. In present case, medium used is glass. The best way to determine a glass block's index of refraction is using Snell's Law.

According to Snell's Law, refractive index = \frac{sinQ1}{snQ2}
where, Q1 = angle of incident ray
Q2 = angle of refracted ray. 


Answer 10: 
Joseph studied whether different materials can block certain electromagnetic waves by testing television reception in different parts of the house. At each part of the house, Joseph used a different antenna. The experiment could have been improved by using the same antenna during each trial. Because, currently Joseph has two variable i.e. materials and antenna. This will complicate the experiments, as it would be difficult for Joseph to identify the material  that would be best suited for blocking certain electromagnetic waves. On other hand, if Joseph has used same antenna, there would have been only one variable i.e. materials. 

7 0
3 years ago
How can we use the Doppler Effect to locate galaxies in space?
Hunter-Best [27]

Answer:

I just learned this in class lol

Explanation:

if the galaxies are going way from us, it's redshirt

if the galaxies are coming toward us, it's bkieshift but it's always galaxies redshifting from us due to galaxies moving away from us

7 0
3 years ago
The nuclei of two atoms of _____________are combined to form a single atom of _________with a larger nucleus.
kotykmax [81]
The answer is option number 3
3 0
3 years ago
How do pioneer species make ecological succession possible on an island formed from a volcanic eruptions
SIZIF [17.4K]

Answer:

The correct option is <em>3. they break down rock into soil in which plants can grow</em>

Explanation:

When a disaster is such huge that even the soil and organic matter get removed from the place, then the succession that will occur in such kind of place will be termed as primary succession. For example, a volcanic eruption or an earthquake.

On the other hand, if after a disaster some of the organic matter remains on the land, then the succession that will occur will be termed as secondary succession. E.g a succession after fire

In primary succession, the pioneer species will be plants that require less soil such as the lichens. The lichens will break down the rocks into the soil and eventually new species of plants will start to grow on the land.

3 0
3 years ago
How metal and bamboo instruments are played?​
Rufina [12.5K]
Answer: Mallets
Why? (Little confused by question but this is what I know about metal and bamboo instruments)
You have to play the with a mallet that is less dense and less hard than the material you play on like metal and bamboo

Hope this helps :D
5 0
3 years ago
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