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
astraxan [27]
3 years ago
15

A statue is made of bronze, which is an alloy of about 80% copper and 20% tin. Which metal is in the higher concentration in thi

s bronze statue?
A.The concentrations of each metal in the statue are equal.
B.The statue has a higher concentration of copper.
C.Tin is more concentrated in the statue.
Physics
2 answers:
Olenka [21]3 years ago
7 0

Answer:

<h2>B. The statue has a higher concentration of copper.</h2>

Explanation:

We know by given that the statue is made of bronze, which is formed by 80% copper and 20% tin.

So, as you can observe, the copper represents a majority of the statue, that means it has more concentration of copper than tin.

Therefore, the right answer is B. The statue has a higher concentration of copper, because it's made 80% of copper actually.

skad [1K]3 years ago
3 0
The answer is B because it's 80 percent copper, that's a greater number then 20.
You might be interested in
A tall cylinder contains 30 cm of water. Oil is carefully poured into the cylinder, where it floats on top of the water, until t
Anastaziya [24]

Answer:

The gauge pressure is  P_g  =  2058 \ P_a

Explanation:

From the question we are told that

       The height of the water contained is  h_w  =  30 \ cm  =  0.3 \ m

        The height of liquid in the cylinder is  h_t  =  40 \ cm  = 0.4 \ m

       

At the bottom of the cylinder the gauge pressure is  mathematically represented as

        P_g  =  P_w + P_o

Where  P_w is the pressure of water which is mathematically represented as

      P_w  =  \rho_w  *  g * h_w

Now  \rho_w is the density of water with a constant values of  \rho_w  = 1000 \ kg /m^3

   substituting values

      P_w  = 1000 *  9.8 *  0.3

     P_w  =  2940 \  Pa

While P_o is the pressure of oil which is mathematically represented as

          P_o  =  \rho_o *  g *  (h_t -h_w )

Where \rho _o is the density of oil with a constant value

         \rho _o  = 900 \ kg / m^3

substituting values

       P_o  =  900 *  9.8 * (0.4 - 0.3)

       P_o  =  882 \ Pa

Therefore

      P_g  =  2940 - 882

      P_g  =  2058 \ P_a

6 0
3 years ago
A police car is traveling north on a straight road at a constant 16.0 m/s. An SUV traveling north at 30.0 m/s passes the police
Nastasia [14]

Answer:

It will take 15.55s for the police car to pass the SUV

Explanation:

We first have to establish that both the police car and the SUV will travel the same distance in the same amount of time. The police car is moving at constant velocity and the SUV is experiencing a deceleration. Thus we will use two distance fromulas (for constant and accelerated motions) with the same variable for t and x:

1. x=x_{0}+vt

2. x=x_{0}+v_{0}t+\frac{at^{2}}{2}

Since both cars will travel the same distance x, we can equal both formulas and solve for t:

vt = v_{0}t+\frac{at^2}{2}\\\\   16\frac{m}{s}t =30\frac{m}{s}t-\frac{1.8\frac{m}{s^{2}} t^{2}}{2}

We simplify the fraction present and rearrange for our formula so that it equals 0:

0.9\frac{m}{s^{2}} t^{2}-14\frac{m}{s}t=0 \\\\ t(0.9\frac{m}{s^{2}}t-14\frac{m}{s})=0

In the very last step we factored a common factor t. There is two possible solutions to the equation at t=0 and:

0.9\frac{m}{s^{2}}t-14\frac{m}{s}=0 \\\\  0.9\frac{m}{s^{2}}t =14\frac{m}{s} \\\\ t =\frac{14\frac{m}{s}}{0.9\frac{m}{s^{2}}}=15.56s

What this means is that during the displacement of the police car and SUV, there will be two moments in time where they will be next to each other; at t=0 s (when the SUV passed the police car) and t=15.56s(when the police car catches up to the SUV)

8 0
3 years ago
Help with this ASAP it’s due today
adoni [48]
I didn’t know water has calories
7 0
3 years ago
How is velocity ratio of wheel and axle calculatedaad<br>​
iogann1982 [59]

Answer:

VR = \frac{Radius of wheel}{Radius of axle}

Explanation:

A machine is a device that can be used to overcome a load by the application of an effort through a pivot. Examples are: pulleys, wedge, screw jack, wheel and axle etc.

The wheel and axle is a simple device that can be used to lift a load through a height. Its velocity ratio (VR) can be determined by:

VR = \frac{Radius of wheel}{Radius of axle}

Note that for a practical wheel and axle, the radius of the wheel is greater than the radius of the axle.

3 0
3 years ago
How does a helicopter fly ? ( I need it explained in the view of physics)
Zielflug [23.3K]

Answer:

because blades of helicopter create a high pressure difference between lower and higher portion of blade so due to this pressure difference helicopter became able to fly.

Explanation:

for instant answer

join wats up group

just scan it

post question

get answer from trusted experts for free

3 0
3 years ago
Read 2 more answers
Other questions:
  • Molecules move from areas of low concentration to high concentration through a process of
    8·1 answer
  • What is the largest four subsystems?​
    15·1 answer
  • An object is moving to the right in a straight line. The net force acting on the object is also directed to the right, but the m
    5·1 answer
  • You (85 kg) are standing on the horizontal surface at the top of a cliff. The coefficient of static friction between your feet a
    6·1 answer
  • A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly
    7·1 answer
  • How many protons, neutrons, and electrons does a neutral atom of this element have? (round atomic mass to nearest whole number)
    6·2 answers
  • Which option is part of designing a set of experimental procedures?
    12·2 answers
  • About 50 000 years ago, in an area located outside Flagstaff, Arizona, a giant
    11·1 answer
  • Why is brainly so dumb? I am currently trying to get into my account right now, and even though I JUST changed it, it keeps sayi
    6·2 answers
  • Which force counteracts motion whenever two surfaces come into contact?.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!