PHYSICS HIGH SCHOOL

In order to increase thermal energy, the temperature must ___________.a.
increase
c.
remain the same
b.
decrease
d.
it cannot be determined

Answers

Answer 1
Answer:

Answer: Option (a) is the correct answer.

Explanation:

Energy obtained by an object due to the motion of particles that are present within the object is known as thermal energy.

So, when we increase the temperature of a substance then its molecules tend to gain kinetic energy. Because of this molecules will start to move from their initial position and hence, there will be more number of collisions between the molecules.

As a result, there will be increase in thermal energy of the substance.

Thus, we can conclude that in order to increase thermal energy, the temperature must increase.
Answer 2
Answer: In order to increase thermal energy, the temperature must increase

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On a large scale, matter is mostly neutral. What is true of electric forces on a large scale?a) They are exactly zero. b) They are mostly negative. c) They are close to zero. d) They are mostly positive.
When a refrigerant condenses, the surrounding air is _____.a) condensed b) cooled c) warmed d) unchanged
Which of the following condition would decrease the ability of a person to hear a sound?
Assumes matter is made of small particles in constant motion

Your vessel's position should be plotted using bearings of____.

Answers

Your vessel's position should be plotted using bearings of fixed known objects on shore.

A 30cm diameter wheel rotates with a constant angular acceleration of 2.00 rad/s2. It starts from rest at t = 0, and a chalk line drawn to a point, P, on the rim of the wheel makes an angle of 37.1° with the horizontal at this time. At t = 2.00 s, find (a) the angular speed of the wheel (b) the linear velocity and tangential acceleration of P

Answers

Answer:

a) 4.00 rad/s

b) 0.6 m/s, 0.3 m/s²

Explanation:

Given:

ω₀ = 0 rad/s

α = 2.00 rad/s²

t = 2.00 s

Find:

a) ω

b) v, a

a) ω = αt + ω₀

ω = (2.00 rad/s²) (2.00 s) + (0 rad/s)

ω = 4.00 rad/s

b) v = ωr

v = (4.00 rad/s) (0.15 m)

v = 0.6 m/s

a = αr

a = (2.00 rad/s²) (0.15 m)

a = 0.3 m/s²

include at least 3 reasons why having electricity is so great and at least 3 reasons why living without electricity would be so difficult

Answers

REASONS WHY ELECTRICITY IS GREAT AND BAD 
THREE REASONS WHY IT WOULD BE DIFFICULT TO HAVE NO ELECTRICITY 
1) it would be hard to get around 
2) would not be able to do homework because no power to light up computers.ipads etc 
3) without light we can't read and get an education 
THREE REASONS WHY ELECTRICITY IS GREAT 
1)  we have devices that get lighted up by electricity like computers,ipods,etc 
2) we could get around pretty easy with light 
3) we could get an education cause we can see and use devices like computers to help us 
HOPE THIS HELPED !!

1. What is meant by half-life?The time for a radioactive sample to reduce to half of its radioactivity.
The time for half of a radioactive sample to decay into new substances.
The time for a radioactive sample to reduce to half of its original mass.
The time for half of a radioactive sample to lose its radioactivity.

4. The isotope uranium-232 has a half-life of 68.9 years. How long will it take for 60% (N/N0 = 0.60) of the original sample to decay?

5.8 years
50.8 years
93.5 years
407 years

5. The isotope barium-133 has a half-life of 10.51 years. Of a 10 kg sample, how much will remain after 50 years?

0.37kg
4.53kg
8.64kg
270kg
6. A piece of bone from a horse found in an archaeological site is dated using carbon-14 dating. It is found that the bone has 78% of the carbon-14 that it would have when the horse was alive. Approximately how long ago did the horse die?

900 years ago
2,000 years ago
14,100 years ago
35,800 years ago
7. At an physics research facility 0.0027 kg of a new isotope is made in an atomic collider. After 6 seconds, 0.00147 kg remain. What is the half-life of the isotope?

0.25 seconds
5.26 seconds
6.84 seconds
500 seconds

Answers

1. The time for a radioactive sample to reduce to half of its original mass.
4. 10% of 232 is 23.2 times 6 equals 139.2
68.9 x6 equals 413.4
5. 0.37kg
6. 2000 years
7. 6.84 seconds

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Gravity
Pressure
Nuclear explosions.

Answers

Gravity. When a dying star of sufficient mass is no longer to support nuclear reactions in its core, it loses the pressure in the core that supports the entire star. Since there is now nothing to counter its own gravity, the entire star implodes until it becomes either a neutron star or, if its mass is large enough, a black hole. 

In the picture below, two light beams are traveling through water. If the frequency of one light beam is greater than the other, what can be said about their wavelengths?Select one:
a. The light beam with the higher frequency has the longer wavelength.
b. The light beam with the higher frequency has the shorter wavelength.
c. Wavelength does not depend on frequency therefore the wavelengths could be equal.
d. Not enough information is given to tell.​

Answers

B I’m not sure tho hope it helps
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