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
QveST [7]
3 years ago
8

A man of mass 85 kg runs up a flight of stairs of height 4.6 m in a time period

Physics
1 answer:
seraphim [82]3 years ago
7 0

Explanation:

a) Power = work / time = force × distance / time

P = Fd/t

P = (85 kg × 9.8 m/s²) (4.6 m) / (12 s)

P ≈ 319 W

b) P = Fd/t

0.70 (319 W) = (m × 9.8 m/s²) (4.6 m) / (9.6 s)

m = 47.6 kg

You might be interested in
List 5 possible effects of not adhering to standards of measurement
murzikaleks [220]

Answer:

factual evidence of customer-service levels.

better understanding of cross-functional performance.

enhanced alignment of operations with strategy.

evidence-based determination of process improvement priorities.

detection of performance trends.

better understanding of the capability range of a process.

3 0
3 years ago
Matter can undergo chemical reactions and nuclear reactions, which
asambeis [7]

Answer:

C

Explanation:

they involve breaking and making chemical bonds

8 0
2 years ago
give an example of motion in which displacement of the particle is zero but acceleration is not zero in journey?
BartSMP [9]

Motion of a ball thrown by a person upwards and caught after some time is an example of motion in which displacement of the particle is zero but acceleration is not zero in journey.

The displacement of the ball is zero because the starting and end point of the motion are same, i.e, the person's hands.During its motion, the acceleration of ball is constant and non zero called as acceleration due to gravity, g= -9.8 m/s². The velocity of ball is continuously changing. It first decreases during the upward motion of the ball and then increases during the downward journey.The acceleration remains constant and non zero all the time.

4 0
3 years ago
Which choice correctly describes what happens during heating?
Masja [62]

Answer:

Option 4

Explanation:

During heating actually heat transfer takes place from a body at higher temperature to a body at lower temperature and the heat transfer takes place until both attain the same temperature  

Therefore heat transfer depends on the temperature of the systems

Now while comparing the thermal energies of the systems, if both the systems have same mass then the system which is at higher temperature has greater thermal energy when compared to the system which is at lower temperature

So in this case assuming that both the systems have same mass then the energy will leave the system with greater thermal energy and go into the system with less thermal energy as the system with greater thermal energy in this case will be at higher temperature and we are considering this assumption because thermal energy not only depends on temperature but also depends on mass of the system

7 0
3 years ago
Which one is the answer
andreev551 [17]

Answer:

translucent

Explanation:

you can see light coming thru but u cant see thru the glass.

4 0
3 years ago
Read 2 more answers
Other questions:
  • determine the weight in newtons of a woman whose weight in pounds is 125. also, find her mass in slugs and in kilograms. DEtermi
    8·1 answer
  • An object's potential energy is set it cannot change is this true
    12·2 answers
  • The potential difference between two parallel conducting plates in vacuum is 165 V. An alpha particle with mass of 6.50×10-27 kg
    7·1 answer
  • Which of the following is an accurate statement?
    12·1 answer
  • An electric heater is rated at 1500 W, a toaster at 750 W, and an electric grill at 1000 W. The three appliances are connected t
    11·1 answer
  • The charge per unit length on a long, straight filament is-92.0 μC/m. (a) Find the electric field 10.0 cm from the filament, whe
    10·1 answer
  • The amount of pressure exerted by a solid is based on
    11·2 answers
  • You want to calculate how long it takes a ball to fall to the ground from a height of 20 m. Which equation can you use to calcul
    11·1 answer
  • NEED HELP ASAP! DUE NOW!!
    14·1 answer
  • Amount of pressure of liquid increases with ?​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!