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## 10 Objective Type Questions on Heat-Part II

Heat is energy transferred from one body, region, or thermodynamic system to another due to conduction or  thermal radiation It is often described as one of the fundamental processes of energy transfer between physical entities.All  substance releases heat -some more some less. Sun emits enormous amount of heat energy. Here is the fundamental test on heat

## 10 Objective Type Questions on Heat-Part II

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1. which of the following types of electromagnetic radiation can be used to check metal parts for damage? X-rays, Microwave or infrared radiation?

2. A 2.0-kg mass is attached to one end of a spring with a spring constant of 100 N/m and a 4.0-kg
mass is attached to the other end. The masses are placed on a horizontal frictionless surface
and the spring is compressed 10 cm. The spring is then released with the masses at rest and
the masses oscillate. When the spring has its equilibrium length for the ﬁrst time the 2.0-kg
mass has a speed of 0.36 m/s. The mechanical energy that has been lost to the instant is:
A. zero
B. 0.31 J
C. 0.61 J
D. 0.81 J
E. 1.2 J

The correct answer is B. Pls. Explain.

3. Constructive interference will maximize the amplitude of two waves of identical wavelength if they are offset by:
wavelength/4
wavelength/2
wavelenth/pi
wavelength/2pi
wavelength

4. where can I find useful websites about physics? especially physics that deal with engineering

Thank you!!

5. hello everybody. Lets say you had jet boots that were unstable. They provided upward thrust but you could not control the thrust. You might suddenly jet off to the right. So now, you have this idea. To a gauntlet, that works simialair to an Ion thruster. Now, you you turn you boots on. Your flying up. You suddenly jerk to the right. You power up your right hand trhruster. How much power would you need to stabilize. When I say power, how much power would you need to add to your gauntlet?

6. Bullets from two revolvers are ﬁred with the same velocity. The bullet from gun #1 is twice as
heavy as the bullet from gun #2. Gun #1 weighs three times as much as gun #2. The ratio
of the momentum imparted to gun #1 to that imparted to gun #2 is:
A. 2:3
B. 3:2
C. 2:1
D. 3:1
E. 6:1

The Correct Answer is C. Pls. Explain

7. A particular horizontal turntable can be modeled as a uniform disk with a mass of 200 g and a
radius of 20 cm that rotates without friction about a vertical axis passing through its center. The
initial angular speed of the turntable is 2.4 rad/s. A ball of clay, with a mass of 80 g, is dropped
from a height of 35 cm above the turntable. It hits the turntable at a distance of 10 cm from the
center, and sticks where it hits so that the clay and the turntable rotate together at a new angular
speed. Assuming the turntable is firmly supported by its axle so it remains horizontal at all times,
find the final angular speed of the turntable-clay system.
PLEASE EXPLAIN HOW TO DO IT!!

8. Tractors can ride through a mudy field that a car would readly sink into, even though the difference in wight is no that much. WHY ? What is the difference between the tractor and car?

9. a car stands beside a series of poles 4 m apart. it accelerates from rest at a rate of 2m/s^2 for 4 seconds, maintains its constant velocity for another 4 seconds, and brakes to rest in 2 seconds. how many poles have the car passed?

can you please show me the solution? thanks

10. Its what I want to study at university… I did A level Biology, Chemistry, Physics and Maths and really hated the maths. I got an A in Biology and Chemistry, an A* in Physics and I got a B in maths. D’you think I’ll cope with Physics in university?

11. Physics homework help!!!!! very important, need to get an A?
an object is placed in front of a diverging lens with a focal length of 20.0 cm. For each object distance, find the image distance and the magnification. Describe each image.

a. 40 cm
B. 20.0 cm
C. 10.0 cm

i think one equatiom might jog ur memory, like 1 over p plus 1 over f equals 1 over q or something like tht, plz help me, i need to pass physics fo this quarter, i did the 1st 6 problems, but cant get these last two. thnx very very much

12. two people (one 80kg and the other 40kg) are standing on ice skates and they push off of each other. Who pushes off with the greatest force? Who experiences the greater acceleration?

13. When a particle suﬀers a head-on elastic collision with another particle, initially at rest, the
greatest fraction of kinetic energy is transferred if

A. the incident particle is initially traveling very fast
B. the incident particle is traveling very slowly
C. the incident particle is much more massive than the target particle
D. the incident particle is much less massive than the target particle
E. the incident and target particle have the same mass

but why?
thank you

14. Want to help me out?
Would be greatly appreciated.

Here’s all four:

How does physics serve to improve our understanding of physical systems?

How do the principles of physics effect your daily life?

Describe something in nature that has become more compelling because of an understanding of physics principles

Is it possible to describe the whole natural world (chemical and biological) with a small number of physical principles? If so, how?

Is physics a redundant science? Do we now have a clear understanding of the interactions between matter and energy on all scales? Is technological application the main thrust of physics research today?

15. Is Physics needed for business universities? How important is Physics in regards to getting into a business University? I’m talking about Canadian business school Universities, by the way.

For example, if I didn’t take calculus/data management/advanced functions, then I know for a fact that any business school would NOT let me in.

But what about physics? If I didn’t take physics, does it matter? Or is it an instant rejection from business schools?

16. I have been conditionally accepted into a respiratory therapist program but have never taken any Physics perviously and one of the requirments is 112 physics. I am planning to take a correspondence course via a local college, but am worried about not being able to understand the concepts of physics. I would greatly appreciate some insite on what Im up against! Thanks!

PS: Also if you know how interelated the concepts of physics and respiratory therapy are it would be nice to know.