1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ddd [48]
3 years ago
5

What did Dr. Kidwell's fighting so the birds eating a box on different tree trunks

Physics
1 answer:
Gelneren [198K]3 years ago
3 0
I think it's D(Leaves).
You might be interested in
How is it possible for two objects to have the same momentum but different velocities give an example
castortr0y [4]
Momentum is
p = mv, where m is the mass and v is the speed.
So, if two objects have the same momentum but different speeds, the must have different masses as well.
v1/v2 = m2/m1
The example is a car and a truck. Car has the mass 1000 kg and velocity 100 m/s, and truck has the mass 5000 kg and velocity 20 m/s. Use the formula above to determine is it true that they have the same momentum:
(100 m/s) / (20 m/s) = (5000 kg) / (1000 kg)
5 = 5
So, the example is correct.
Hope this helps! Good luck!
4 0
3 years ago
The mass of one cup of water is 0.236 kilograms. Use scientific notation to represent the mass of one cup of water.
Crazy boy [7]
2.36 x 10^-1
You move the decimal to right behind the first significant digit and the exponent on the 10 is how many places you moved that decimal. You can type it into a calculator to check it as well if you're not sure.

5 0
3 years ago
Read 2 more answers
What type of circuit is illustrated?
Gemiola [76]
Hey! The correct answer is D.open circuit,Please do give me brainiest answer I need 1 more to level up. Thanks ;]
4 0
3 years ago
Read 2 more answers
A heat engine accepts 200,000 Btu of heat from a source at 1500 R and rejects 100,000 Btu of heat to a sink at 600 R. Calculate
diamong [38]

To solve the problem it is necessary to apply the concepts related to the conservation of energy through the heat transferred and the work done, as well as through the calculation of entropy due to heat and temperatra.

By definition we know that the change in entropy is given by

\Delta S = \frac{Q}{T}

Where,

Q = Heat transfer

T = Temperature

On the other hand we know that by conserving energy the work done in a system is equal to the change in heat transferred, that is

W = Q_{source}-Q_{sink}

According to the data given we have to,

Q_{source} = 200000Btu

T_{source} = 1500R

Q_{sink} = 100000Btu

T_{sink} = 600R

PART A) The total change in entropy, would be given by the changes that exist in the source and sink, that is

\Delta S_{sink} = \frac{Q_{sink}}{T_{sink}}

\Delta S_{sink} = \frac{100000}{600}

\Delta S_{sink} = 166.67Btu/R

On the other hand,

\Delta S_{source} = \frac{Q_{source}}{T_{source}}

\Delta S_{source} = \frac{-200000}{1500}

\Delta S_{source} = -133.33Btu/R

The total change of entropy would be,

S = \Delta S_{source}+\Delta S_{sink}

S = -133.33+166.67

S = 33.34Btu/R

Since S\neq   0 the heat engine is not reversible.

PART B)

Work done by heat engine is given by

W=Q_{source}-Q_{sink}

W = 200000-100000

W = 100000 Btu

Therefore the work in the system is 100000Btu

4 0
3 years ago
What is the pooled variance for the following two samples?
Snowcat [4.5K]
I think it is B as 168/20
4 0
3 years ago
Other questions:
  • If a pendulum has a period of 2.4 seconds what is the frequency?
    5·1 answer
  • The distance between two telephone poles is 50 m. A 1 kg bird lands on the telephone wire midway between the poles, and the wire
    14·1 answer
  • 1. A pair of oppositely charged parallel plates is separated by 5.51 mm. A potential difference of 614 V exists between the plat
    13·1 answer
  • Most of the water vapor and carbon dioxide in earth's atmosphere is found A. In the upper part of the atmosphere. B.In the thin
    13·1 answer
  • If a person driving 130 miles per hour and hit a brick wall ? Does the brick wall hit (push) the car back ? Which Newton laws wo
    5·2 answers
  • Determine the inductance L of a 0.65-m-long air-filled solenoid 3.2 cm in diameter containing 8400 loops.
    6·1 answer
  • PLEASE HELP 50 pts + brainliest. 3. A laser light travels from air (n=1) through water (n=1.33), and then a piece of glass (n=1.
    9·1 answer
  • How is thermal energy transferred during convection? by physical contact by electromagnetic waves by movement in fluids by mecha
    9·2 answers
  • You are planning a bicycle trip for which you want to average 24 km/h. You cover the first half of the trip at an average speed
    7·1 answer
  • What was the most difficult thing about organizing your store
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!