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
marshall27 [118]
3 years ago
6

Computes average speed when a person walk for 1 minute at speed of 1.5 m/s and another 1 minute at speed of 3.5 m/s along a stra

ight road
Physics
1 answer:
Vinvika [58]3 years ago
3 0

Answer:

2.5 m/s

Explanation:

(60*1.5+60*3.5)/120=2.5

or

(1.5+3.5)/2=2.5

You might be interested in
How long would it take for a ball dropped from the top of a 576-foot building to hit the ground? round your answer to two decima
LUCKY_DIMON [66]
If a ball is if a ball is dropped from a 576ft building it would take about 8 seconds for it to hit the ground.
4 0
3 years ago
The internal energy of a system changes because the system gains 160 J of heat and performs 309 J of work. In returning to its i
o-na [289]

Answer:

w=255

Explanation:

The change in internal energy is given by the first law:

ΔE = Q - w

where ΔE is the change in internal energy of the system

q is the heat added to the system

w is the work done *by* the system on the surroundings

So, for the first phase of this process:

ΔE = Q - w

Q=160J

w=309J

ΔE = 160J - 309J = -149J

To bring the system back to its initial state after this, the internal energy must change by +149J (the system myst gain back the 149 J of energy it lost).  We are told that the system loses 106 J of heat in returning to its initial state, so the work involved is given by:

ΔE = Q - w

+149J = -106J - w

255J = -w

w = -255J

5 0
3 years ago
Why does a magnet attract a steel nail
SVEN [57.7K]

Answer:

The nail will stick to the bar magnet because it will become magnetized, and it's metal. The presence of the nearby north pole rearranges the magnetic domains inside the steel so that their south poles all point toward the north pole of the permanent magnet. As a result, the other end of the nail becomes a north pole.Magnets attract iron due to the influence of their magnetic field upon the iron. ... When exposed to the magnetic field, the atoms begin to align their electrons with the flow of the magnetic field, which makes the iron magnetized as well. This, in turn, creates an attraction between the two magnetized objects.

7 0
3 years ago
A meteorologist plans to release a weather balloon from ground level, to be used for high-altitude atmospheric measurements. The
Slav-nsk [51]

Answer:

563.86 N

Explanation:

We know the buoyant force F = weight of air displaced by the balloon.

F = ρgV where ρ = density of air = 1.29 kg/m³, g = acceleration due to gravity = 9.8 m/s² and V = volume of balloon = 4πr/3 (since it is a sphere) where r = radius of balloon = 2.20 m

So, F = ρgV = ρg4πr³/3

substituting the values of the variables into the equation, we have

F =  1.29 kg/m³ × 9.8 m/s² × 4π × (2.20 m)³/3

= 1691.58 N/3

= 563.86 N

8 0
3 years ago
give me some like COD and mafia 3 like games please! I want like more gore, guts and glory, So for yall gamers out there, give m
Svetlanka [38]

Answer:

any black ops i started playing crysis 3 its good and gta5

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • A spherical conductor with a radius of 54.5 cm has an electric field of magnitude 4.00 × 105 V/m just outside its surface. What
    15·1 answer
  • A wave has a velocity of 24 m/s and a period of 3.0 s. Calculate the wavelength of the wave.
    10·1 answer
  • researchers want to use edna to look for an invasive species in a waterway. which of these steps should they do first? a. precip
    13·2 answers
  • Which motion map represents an object moving in uniform circular motion with the greatest tangential speed?
    5·2 answers
  • The amount of heat needed to increase the temperature of a 1-kilogram substance by 1°C is known as the
    10·2 answers
  • A parallel plate capacitor has circular plates with diameter D 21.5 cm separated by a distance d 1.75 mm. When a potential diffe
    6·1 answer
  • Heat from the Sun reaches Earth thanks to _____.
    6·2 answers
  • I will mark brainliest!! The Moon travels around the Earth each month in an elliptical path, as opposed to a perfect circle.
    13·1 answer
  • Galileo Galilei was the first scientist to perform experiments in order to test his ideas. He was also the first astronomer to s
    14·1 answer
  • If you throw an apple towards the sky why its going up in spite of gravitational pull?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!