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LuckyWell [14K]
3 years ago
10

If the forces acting on an object are balanced, what must be true about the motion of this object?

Physics
2 answers:
Novay_Z [31]3 years ago
8 0
D it must have a constant velocity or it would not be balanced
Leokris [45]3 years ago
5 0

Answer:

D Constant velocity

Explanation:

if it has forces moving on it it has constant velocity

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A microscope has an objective lens with a focal length of 14.0mm . A small object is placed 0.80mm beyond the focal point of the
Nikolay [14]

Answer:

A. 260 mm

B. - 18

C. 175

Explanation:

A

The expression for the lens equation is

\frac{1}{f} = \frac{1}{u} + \frac{1}{v}

\frac{1}{14.0mm} = \frac{1}{14.80 mm} + \frac{1}{v}

\frac{1}{v} = \frac{1}{14.0} - \frac{1}{14.80}

v = 259 mm

   = 260 mm or 26 cm (to 2 s.f)

check the attached files for additional solution

3 0
3 years ago
A drop of blood is discovered at a crime scene. In order to determine if it is human blood, the forensic investigator performed
arlik [135]
It is (C): human.
This is more like forensic sciences or biology btw.
5 0
3 years ago
Read 2 more answers
One of the heating systems we talked about in this course comprises of a system of ducts. What is the process by which heat is t
madreJ [45]

Answer: b- covection

Explanation:

Conduction: It is the circulation or transfer of heat through a metal or solid. For example, heat generated inside an enclosure can be transferred to the outer surface by means of conduction.so therefore conduction can not be the answer.

Convection is the circulation or tansfer of heat from a surface by means of a fluid such as air. Natural convection happens when air is heated: it expands, rises, and is replaced by cooler air. The amount of convection may be increased by using a fan to increase the flow of air.Likewise,Ducts are used to circulate air in the system. Since, air is circulated in the system, heat is transfered by convection.Hence,the answer is B-convection.

Radiation: Here, energy is radiated through the air by means of electromagnetic radiation. Since heat transfer through raidation does not involve contact between the heated object and the heated source,so energy is lost as light or through electromagnetic radiation. So C is wrong.

7 0
3 years ago
A car traveling at a speed of 25 m/s increases its speed to 30 m/s in 10 sec. What is the acceleration of the car?
inysia [295]

Answer:

.5m/s/s

Explanation:

V + at

8 0
3 years ago
When sound waves strike the eardrum, this membrane vibrates with the same frequency as the sound. The highest pitch that typical
kherson [118]

Answer:

Explanation:

Time period, T = 50 μs = 50 x 10^-6 s

Frequency is defined as the number of oscillations or vibrations completed in one second.

The reciprocal of time period is called frequency.

f = 1 / T

f = 1 / (50 x 10^-6)

f = 20,000 Hz

Angular frequency, ω = 2 x π x f

ω = 2 x 3.14 x 20,000

ω = 125600 rad/s

7 0
3 years ago
Read 2 more answers
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