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
Gnom [1K]
3 years ago
7

(this is my sister on my acc I'm letting her) True or False? When you use a pulley you use less force to pull up a load.Explain

your thinking below. btw im in grade four so no fancy words.​
Mathematics
1 answer:
natta225 [31]3 years ago
3 0

Answer:

True depending on what you are comparing it to.

Step-by-step explanation:

A pulley would help lighten the load that you are trying to pull up, which may make it easier for you to get the load to your designated area. The more complicated it is, usually the more 'lighter' it becomes, or the less force you have to exert.

For example, you will have to give a 100% energy in trying to life a heavy box. However, if you use a simple pulley (only one), you may only have to exert 75% more energy, for the weight is significantly lower.

~

You might be interested in
Help with the following problem please
Effectus [21]
Given:
The largest circle has a radius of R=7 units.
Let x be the radius of the large shaded circle.
The small shaded circles have a radius of 1/5 of the large shaded circle.
=> the small shaded circles have a radius of r=x/5

By adding up radii, we have the equation
2(r+x+r)=2(x/5+x+x/5)=2R=2*7=14
Simplify:
7x/5=14/2
x=5
=> r=1

Area of outer circle                  = \pi R^2=\pi7^2=49\pi
Area of large shaded circle      = \pi x^2=\pi5^2=25\pi
Area of 4 small shaded circles = 4\pi r^2=4\pi1^2=4\pi
Total area of shaded circles     =25\pi+4\pi=29\pi

Shaded area as a fraction of that of the outer circle 
=\frac{29\pi}{49\pi}=29/49

3 0
3 years ago
- 3x + 4 and passes through the point (2,5)
Anuta_ua [19.1K]

Answer:

y=(x+13)/3

Step-by-step explanation:

the question is not quite clear, i think u mean y= -3x + 4

then, the slope of the line perpendicular to the given line is m1.m2= -1, hence, -3.m2= -1 m2 = 1/3

y-5=1/3(x-2) y=x/3+13/3 or y=(x+13)/3

6 0
3 years ago
the rectangular top of Kathleen's desk has a length of 24 inches and a width of 17 inches. What is the area of the top of Kathle
Olin [163]

Answer:

28

Step-by-step explanation:

7 0
3 years ago
An engineer deposits $2,000 per month for four years at a rate of 24% per year, compounded semi-annually. How much will he be ab
Alex17521 [72]

The amount of money he will be able to withdraw after 10 years after his last deposit is $926,400.

<h3>Compound interest</h3>

  • Principal, P = $2,000 × 12 × 4

= $96,000

  • Time, t = 10 years
  • Interest rate, r = 24% = 0.24
  • Number of periods, n = 2

A = P(1 + r/n)^nt

= $96,000( 1 + 0.24/2)^(2×10)

= 96,000 (1 + 0.12)^20

= 96,000(1.12)^20

= 96,000(9.65)

= $926,400

Therefore, the amount of money he will be able to withdraw after 10 years after his last deposit is $926,400

Learn more about compound interest:

brainly.com/question/24924853

#SPJ4

5 0
2 years ago
The conversion of a temperature from Celsius to Fahrenheit is represented by the expression below, where C is the temperature in
Ainat [17]

Answer:

B.

Step-by-step explanation:

C= 20 degrees Celsius

20 x 9/5 = 180/5

180 divided by 5 = 36 degrees celsius

Then you do 36 degrees celsius + 32 and you get 68.

So therefore 20 degrees celsius is eqivalent to 68 degrees Fahrenheit.

3 0
2 years ago
Read 2 more answers
Other questions:
  • Martina purchased a prepaid phone card for $20 . Long distance calls cost 14 cents a minute using this card. Martina used her ca
    12·1 answer
  • mr. Johnson was paid $190 for a job that required 40 hours of work. At this rate how much should he be paid for a job requiring
    8·1 answer
  • Anyone please help !!
    13·1 answer
  • Aaron wants to divide the trail mix equally into 6 bags to give to his friends.How much trail mix will be in each bag?
    11·2 answers
  • Is 23/3 a irrational number
    14·2 answers
  • The figure is the net for a rectangular prism. What is the surface area of the rectangular prism represented by the net? Enter y
    15·2 answers
  • Yolanda is saving money to buy a game. So far she has saved $12, which is three-fourths of the total cost of the game. How much
    11·1 answer
  • Write 41 2/3% as a fraction in lowest form
    12·1 answer
  • 3.
    7·1 answer
  • PLZZZ HELLPPP SOON REWARD BRRIANIESTTT
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!