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
RSB [31]
3 years ago
13

The volumes of a sample of lead and a sample of platinum are the same: 2 cm3. The density of lead is 11.3 g/cm3 and the density

of platinum is 21.5 g/cm3.
Which is an accurate description of their relative masses?
A. The masses of the lead and platinum samples are the same.
B. The mass of the lead sample is greater than the mass of the platinum sample.
C. The mass of the platinum sample is greater than the mass of the lead sample.
Physics
2 answers:
Vlad1618 [11]3 years ago
4 0

The answer is C. The mass of the platinum sample is greater than the mass of the lead sample. As I explained in a previous answer, if they are the same volume, but one is heavier, then it must be more dense. In this particular example, the platinum is more dense than the lead, and therefore has more mass.

JulsSmile [24]3 years ago
4 0

Answer:

The mass of the platinum sample is greater than the mass of the lead sample (option C.)

Explanation:

Density is a magnitude that allows you to measure the amount of mass in a given volume of a substance. Then, the expression for the calculation of density is the ratio between the mass of a body and the volume it occupies:

d=\frac{m}{V}

From this expression it can be deduced that the density is inversely proportional to the volume: the smaller the volume occupied by a given mass, the greater the density.

The density of lead is 11.3 \frac{g}{cm^{3} } . Then it is possible to apply a rule of three as follows: if in 1 cm³ of lead there is 11.3 g of substance, in 2 cm³ how much mass is there?

mass=\frac{2cm^{3}*11.3 g }{1cm^{3} }

mass=22.6 g

The density of platinum is 21.5 \frac{g}{cm^{3} }. Then it is possible to apply a rule of three as follows: if in 1 cm³ of platinum there is 21.5 g of substance, in 2 cm³ how much mass is there?

mass=\frac{2cm^{3}*21.5 g }{1cm^{3} }

mass=43 g

Then, you can see that <u><em>the mass of the platinum sample is greater than the mass of the lead sample (option C.)</em></u>

You might be interested in
A 650 × 10–4 F capacitor stores 24 × 10–3 of charge.
alexgriva [62]

C. 0.37V. A capacitor of 650x10⁻⁴F that stores 24x10⁻³C has a potential difference of 0.37V between its plates.

The key to solve this problem is using the capacitance equation C = Q/Vᵃᵇ, where C is the capacitance, Q the charge stored in the plates, and Vᵃᵇ the potential difference between the plates.

A 650x10⁻⁴F capacitor stores 24x10⁻³C, clear Vᵃᵇ for the equation:

C = Q/Vᵃᵇ -----------> Vᵃᵇ = Q/C

Solving

Vᵃᵇ = 24x10⁻³C/650x10⁻⁴F = 0.37V

3 0
3 years ago
Which special effects technique is being used in television weather reports in which meteorologists stand in front of moving map
Pachacha [2.7K]
A. cgi... they're usually filmed with a greenscreen and is keyed out in editing. known as chroma keying
6 0
3 years ago
Read 2 more answers
Which of the following is an example of an object that could have a net force greater than zero acting on it?
mario62 [17]
Net force is basically the force an object has when changing direction, so the answer would be D. 
5 0
3 years ago
Read 2 more answers
A. How far does a 100-newton force have to move to do 1,000 joules
Aloiza [94]

Work done by a force is given as the product of force and the distance moved by the force.

<h3>What is work done?</h3>

Work done is the product of force and the distance moved by the the force.

  • Work done = Force × distance

Thus, distance required by the 100 N force is given as:

  • Distance = work done/force

Distance = 1000/100 = 10 m

Distance to be moved is 10 m.

Force applied = work done/ distance

Force applied by the hoist = 500/2

Force applied by the hoist = 250 N

Distance moved in one push-up = 25 cm = 0.25 m

Work done by the athlete after one push-up = 250 × 0.25 m

Work done by the athlete = 62.5 J

Distance moved by the force = 0 m

Work done = 500 × 0 = 0 N

Therefore, for work to be done, force has to move a distance.

Learn more about work done at: brainly.com/question/25573309

5 0
2 years ago
A motorcycle traveling at 25 m/s accelerates at a rate of 6 m/s2 for 4 seconds. What is the final speed of the motorcycle in m/s
givi [52]

Initial velocity = Vo= 25 m/s

Final velocity = V = x

Acceleration= a = 6 m/s^2

time= t = 4 seconds

Appy the equation:

V = Vo + at

Replacing:

V = 25 + 6(4) = 25 + 24 = 49 m/s

8 0
1 year ago
Other questions:
  • Which sentence contains italicized words that are used as an infinitive phrase?
    12·2 answers
  • A quantitative description of kinematics involves using __ to describe the motion
    6·2 answers
  • On August 15, 2005, a spacecraft in a 190-km, 52 °-inclination circular% parking orbit around the earth departed on a mission to
    14·1 answer
  • What is the central peak in the central Arzachel
    6·1 answer
  • If a water wave vibrates up and down three times each second and the distance between wave crests is 2 meters, what are:
    15·2 answers
  • A person bounces up and down on a trampoline, while always staying in contact with it. The motion is simple harmonic motion, and
    15·1 answer
  • Which sentence avoids using a pronoun reference error?
    5·2 answers
  • What two quantities must stay the same in order for an object to have a constant velocity? A) The speed and kinetic energy must
    15·1 answer
  • A mass m is attached to an ideal massless spring. When this system is set in motion with amplitude a, it has a period t. What is
    15·1 answer
  • Q: Compare and contrast the different parts of the Electromagnetic Spectrum. Evaluate the usefulness of each part and decide whi
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!