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
enot [183]
3 years ago
14

British sterling silver is a copper-silver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams

of British sterling silver should be used to prepare 250 grams of a copper-silver alloy that is 20% copper by weight? (Round your answers to one decimal place.)
Physics
1 answer:
Gala2k [10]3 years ago
8 0

Answer:

The answer to your question is: 200 g

Explanation:

Need 250 gr of copper.silver alloy 20% copper by weight

   

                     250 g alloy  --------------------   100%

                           x             ---------------------    20%

                         x = 20(250)100

                        x = 5000 / 100

                        x = 50 g of copper

Then

   

   g of British sterling silver = 250 g alloy - 50 g of copper

   g of British sterling silver = 200 g

You might be interested in
What is the power of a hair dryer if it uses 72,000 joules energy in 60.0 seconds
Vladimir [108]
Power=Energy
72,000/60 = 1200 watts 
:)
8 0
3 years ago
Read 2 more answers
Question 1 (1 point)
Dmitry [639]

1). trajectory

2). person sitting in a chair

3). 490 meters

4). 65 m/s

5). False.  The projectile's displacement, velocity, and acceleration have vertical and horizontal components, but the projectile doesn't.

6). False

7). The vertical component of a projectile doesn't change due to gravity, but the vertical components of its displacement, velocity, and acceleration do.

The vertical components do NOT equal the horizontal components.

8). Decreasing if you include the effects of air resistance.  Constant if you don't.  Gravity has no effect on horizontal velocity.

9). We can't see the simulation.  But if the projectile doesn't have jets on it, then as it travels upward, its vertical velocity must decrease, because gravity is trying to not let it get away.

10). We can't see the simulation.  But if the projectile is traveling downward, we would call that "falling", and its vertical velocity must increase, because gravity is pulling it downward.

6 0
3 years ago
Read 2 more answers
HELP RIGHT NOW THE RIGHT ANSWER GETS BRAINLEST!!!
cupoosta [38]
Solar Flares: C
Prominences: A
Sun Spots: D
Convection: B
3 0
3 years ago
Read 2 more answers
A block of mass 3kg is placed on a rough surface. The coefficient of static friction between two surfaces is 0.2 then what is th
yarga [219]

Answer:

the minimun horizontal force is = 5,88 N

Explanation:

Using a free body diagram we can calculate this force, in the image attached and using Newton's law we have:

3 0
2 years ago
An object in freefall seems to be
Dominik [7]
Within Gravitational Force without obstruction.
3 0
3 years ago
Other questions:
  • A ball is drawn from an urn containing 3 white and 3 black balls. After the ball is drawn, it is replaced and another ball is dr
    8·1 answer
  • In a playground, there is a small merry-go-round of radius 1.20 m and mass 160 kg. Its radius of gyration is 91.0 cm. (Radius of
    7·1 answer
  • True or false
    14·1 answer
  • Help!!
    11·2 answers
  • A student locates a double-slit assembly 1.40 m from a reflective screen. The slits are separated by 0.0572 mm. (a) Suppose the
    15·1 answer
  • First extinguish a match or candle by blasting it violently. Why?​
    12·1 answer
  • Two children ride side-by-side on a carousel. Their paths are shown in the image below.
    8·1 answer
  • How can a wave carry information?
    11·2 answers
  • A radio station broadcasts its music with waves at a frequency of 7.34 x 10²Hz. These radio waves travel at a speed of 3.00x 10%
    7·1 answer
  • Two large parallel metal plates carry opposite charges. They are separated by 0.20 m and the p.d. between them is 500 V. What is
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!