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
Jlenok [28]
3 years ago
14

Calculate the AMA of an access ramp if it takes 255 N of force to push a person in a wheelchair having a combined weight of 764

N up the incline.
a)2.50
b)2.95
c)3.00
d)1,020
Physics
1 answer:
Andreyy893 years ago
7 0
Actual Mechanical Advantage(AMA) = Weight / Force
Here, Weight = 764 N
Force = 255 N

Substitute the values in to the expression, 
AMA = 764 / 255
AMA = 2.99

After rounding-off to the nearest tenth value, it would be 3

Finally, option C would be your answer.

Hope this helps!
You might be interested in
How reactive is an atom of Sodium(Na) and why?
lara [203]
Sodium (Na) is very reactive because it does not have a full valence shell.
6 0
3 years ago
Which situation describes the highest rate of power?
Darya [45]

Answer : The correct option is, (D) A machine does 400 joules of work in 5 seconds.

Explanation :

Power : It is defined a the rate of doing work per unit time.

Formula used :

P=\frac{w}{t}

where,

P = power

w = work done

t = time

Now we have to determine the rate of power for the following options.

(A) A machine does 200 joules of work in 10 seconds.

P=\frac{200}{10}=20W

(B) A machine does 400 joules of work in 10 seconds.

 P=\frac{400}{10}=40W

(C) A machine does 200 joules of work in 5 seconds.

 P=\frac{200}{5}=40W

(D) A machine does 400 joules of work in 5 seconds.

P=\frac{400}{5}=80W

From this we conclude that, a machine does 400 joules of work in 5 seconds has the highest rate of power.

Hence, the correct option is, (D)

8 0
3 years ago
Omar observes that many buildings in his city were built using limestone. He has read that acid rain can damage limestone. He al
Softa [21]

Answer:he conducts the investigation to see the effect acidic water has on limestone

Explanation:

6 0
3 years ago
At what temperature do the fahrenheit and celsius scales give the same reading?
anygoal [31]
At -40.

-40 gives the same reading for Fahrenheit and Celsius scale.
7 0
3 years ago
Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 3.2 MW. What is the intensity of
Dahasolnce [82]

Answer:

I=1.5\times10^{-28}W/m^2

Explanation:

The intensity is related to the power and surface area by I=\frac{P}{A}=\frac{P}{4\pi r^2}. We need to calculate the surface area of a sphere of radius r=4.3ly.

Since 4.3ly is the distance light travels in 4.3 years at 299792458m/s, we can obtain it in meters by doing:

r=vt=(299792458m/s)(4.3\times365\times24\times60\times60s)=4.1\times10^{16}m

So we have:

I=\frac{P}{4\pi r^2}=\frac{3.2\times10^6W}{4\pi (4.1\times10^{16}m)^2}=1.5\times10^{-28}W/m^2

4 0
3 years ago
Other questions:
  • Consider a magnesium wire (σ = 2.2 ✕ 107 Ω−1 · m−1) with a cross-sectional area of 1 mm2 (similar to your connecting wires) and
    10·1 answer
  • What is the average power output (in W) of a heart defibrillator that dissipates 435 J of energy in 10.5 ms?
    5·1 answer
  • Which of the following is true about the atom shown? Choose all that apply. . . (I will have the Image Bellow). . *It is unstabl
    15·1 answer
  • Describe how to properly measure the volume of a liquid?
    8·1 answer
  • A 5-kg object experiences forces as shown in the diagram. Which statement best describes the motion of the object? A) The object
    14·1 answer
  • Technician A says that the aspect ratio of a tire represents the relationship between the tire's cross-sectional height to its c
    5·1 answer
  • Please help on this one? PLEASE.
    15·1 answer
  • A 9-volt battery is used to power two lightbulbs in a series circuit. The first light bulb has a
    5·1 answer
  • 20kVA, 300/240 V, 50Hz singal phase transformer has 80 turns on secondary winding. calculate number of primary winding turns, fu
    12·1 answer
  • An astronomer observes two ordinary stars. the first one turns out to be twice as hot as the second. this means that the first o
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!