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
nordsb [41]
2 years ago
15

Assume your mass is 84 kg. The acceleration due to gravity is 9.8 m/s 2 . How much work against gravity do you do when you climb

a flight of stairs 3.9 m high
Physics
1 answer:
KATRIN_1 [288]2 years ago
7 0
M, mass=84 kg
height, h=3.9m
gravity, g= 9.8m/s2
W = F . d
F=force
d=Displacement
W=work done by force
Now by putting the values
F= m g (Acting downward )
d= h (Upward)
W= m g h ( work done against the force)
W= 84•9.8•3.9J
W= 3210.48
Therefore the answer will be 3210.48J.
You might be interested in
Define rotational speed?- short answer
Marina86 [1]
Rotational speed of an object around an axis is the numbers of turns of the object divided by time.  <span />
3 0
3 years ago
The equation for photosynthesis is 6H2O (water) + 6CO2 (carbon dioxide) + Light Energy → C6H12O6 (glucose) + 6O2 (oxygen). When
aleksklad [387]

Answer:

b

Explanation:

bc

8 0
3 years ago
Question 1: Bicycle pump
belka [17]

Answer: The pressure  of the air when compressed is 5.0\times 10^5Pa

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

P\propto \frac{1}{V}     (At constant temperature and number of moles)

P_1V_1=P_2V_2  

where,

P_1 = initial pressure of gas  = 1.0\times 10^5Pa

P_2 = final pressure of gas  =?

V_1 = initial volume of gas  = V

V_2 = final volume of gas  = \frac{V}{5}

1.0\times 10^5\times V=P_2\times \frac{V}{5}  

P_2=5.0\times 10^5Pa

Therefore, the pressure  of the air when compressed is 5.0\times 10^5Pa

4 0
3 years ago
At what condition do a coin and feather fall together​
Ronch [10]

Answer:

A feature and a coin dropped from the same height falls at the same speed at the condition at free fall,both coin and feature gain same acceleration of 9.8m/s^2.

4 0
2 years ago
Consider a step-down transformer with 15 turns in the primary and 6 turns in the secondary windings. Calculate the input impedan
AURORKA [14]

Answer:

Input impedance of this transformer is 50 ohms.  

Explanation:

Given that,

Number of turns in the primary coil, N_p=15

Number of turns in the secondary coil, N_s=6

Output impedance of the transformer, V_o=8\ \Omega

The number of turns and the impedance ratio in the step down transformer is given by :

\dfrac{15}{6}=\sqrt{\dfrac{Z_p}{Z_s}}\\\\\dfrac{15}{6}=\sqrt{\dfrac{Z_p}{8}}\\\\Z_p=50\ \Omega

So, the input impedance of this transformer is 50 ohms. Hence, this is the required solution.

8 0
3 years ago
Other questions:
  • A 4,000-kg car traveling at 20m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?
    14·1 answer
  • What causes earth to have a complete year
    13·1 answer
  • Elena (60.0 kg) and Madison (65.0 kg) are ice-skating at the Rockefeller ice rink in New Yok city. Their friend Tanner sees Elen
    7·1 answer
  • What is the name of the ratio of the voltage applied to a circuit and the current in a circuit
    9·1 answer
  • Newton's second law of motion says that the mass of an object times its acceleration is equal to the net force on the object. Wh
    11·1 answer
  • I NEED HELP ASAP
    15·2 answers
  • Three joules of work is needed to shift 10 C of charge from one place to another. The potential difference between the places is
    8·1 answer
  • The results from Rutherford's alpha particle scattering experiment led to
    9·1 answer
  • Electricity and magnetism are separate yet interconnected phenomena. Which of the following options BEST supports the idea that
    13·2 answers
  • How do line symmetry differ from rotational symmetry?.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!