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
prohojiy [21]
2 years ago
5

1. Why are some countries so poor while others are so rich?

Physics
1 answer:
irina [24]2 years ago
8 0

Answer:

It depends on how much resources a country has.

You might be interested in
HELP When the forces are applied in the same direction, how do you determine net force?
aleksklad [387]

Answer:

Explanation:

If two forces act on an object in the same direction, the net force is equal to the sum of the two forces.

5 0
3 years ago
Suppose you are measuring double‑slit interference patterns using an optics kit that contains the following options that you can
svetlana [45]

Answer:

3.6 m

Explanation:

\lambda_R = 650 \ nm\\\\\lambda_R = 650*10^{-9} m\\\\L \ should \ be \ minimum \\\\i.e \  0.25 \ mm\\\\= 0.25 *10^{-3} m

\lambda_R = 700 \ nm\\\\\lambda_R = 700*10^{-9} m\\\\

Also

\beta = 1 \ mm \ fringe \  width

D_{min} = \frac{\beta d}{\lambda}\\\\D_{min} = \frac{10^{-3}*0.25*10^{-3}}{700*10^{-9}}\\\\D_{min} = 3.57 \\D_{min} =  3.6 m

Therefore, the minimum distance L  you can place a screen from the double slit that will give you an interference pattern on the screen that you can accurately measure using an ordinary 30 cm (12 in) ruler. = 3.6 m

4 0
3 years ago
What circumstance would allow an officer to search a home even if they didn’t have a warrant?
Ipatiy [6.2K]

Answer:

A

Explanation:

The officer would have had permission regardless of anything else, kind of like letting someone into your house.

5 0
3 years ago
A typical electric refrigerator has a power rating of 500 Watts, which is the rate (J/s) at which electrical energy is supplied
Goshia [24]

Answer:

The rate of heat removed from inside the refrigerator is 300 watts.

Explanation:

By the First Law of Thermodynamics and the definition of a Refrigeration Cycle, we have the following formula to determine the rate of heat removed from inside the refrigerator (\dot Q_{L}), in watts:

\dot Q_{L} = \dot Q_{H}-\dot W (1)

Where:

\dot Q_{H} - Rate of heat released to the room, in watts.

\dot W - Rate of electric energy needed by the refrigerator, in watts.

If we know that \dot Q_{H} = 800\,W and \dot W = 500\,W, then the rate of heat removed from inside the refrigerator is:

\dot Q_{L} = \dot Q_{H}-\dot W

\dot Q_{L} = 300\,W

The rate of heat removed from inside the refrigerator is 300 watts.

3 0
2 years ago
An object that has kinetic energy must what ?
11Alexandr11 [23.1K]

An object that has kinetic energy must be <em>moving</em>.

The formula for an object's kinetic energy is

KE = (1/2) · (the object's mass) · <u><em>(the object's speed)²</em></u>

As you can see from the formula, if the object has no speed, then its kinetic energy is zero.  That's why kinetic energy is usually called the "energy of motion", and if an object HAS kinetic energy, then that tells you right away that it must be moving.

4 0
3 years ago
Other questions:
  • When nonmetals bond with other atoms, what usually happens?
    5·1 answer
  • Which one of the following is a decomposition reaction?
    11·2 answers
  • A satellite orbits the earth a distance of above the planet’s surface and takes 6.43 hours for each revolution about the earth.
    15·1 answer
  • The Voltage difference of a circuit is 16V and the resistance is 120 ohms. What is the current in the circuit? Show me your work
    15·1 answer
  • The reactivity of an atom arises primarily from ___.
    9·1 answer
  • Which of the following is rounded to 2 significant figures? (Select all that apply)
    13·1 answer
  • Adanna is watching waves on the sea go past two buoys. She knows the buoys are 20 metres apart.
    14·2 answers
  • Plz help me!!!! A spring is connected to a wall as shown below. A mass on a horizontal surface is connected to the springs and p
    6·1 answer
  • I NEED HELP :) ty.............
    8·1 answer
  • who plays adopt me on rob.lox!! plz answer people only if you play though tell me your best pet and your user name so we can pla
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!