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
lilavasa [31]
3 years ago
5

Choose only one correct option. Explanation needed.

Physics
1 answer:
Mama L [17]3 years ago
7 0

Answer:

\large \boxed{\mathrm{C. \  \  \frac{500}{7 \times 15  \times 8} \ g/cm^3 }}

Explanation:

\displaystyle \sf Density = \frac{mass}{volume}

\displaystyle \rho = \frac{m}{V}

\sf mass=500 \ g

\sf volume \ of \ a \ cuboid=width  \times length  \times height=( 7 \times 15 \times 8) \ cm^3

\displaystyle \rho = \frac{500}{7 \times 15  \times 8}

You might be interested in
Coulomb measured the deflection of sphere A when spheres A and B had equal charges and were a distance d apart. He then made the
sdas [7]

Answer:

The new distance is     d = 0.447 d₀

Explanation:

The electric out is given by Coulomb's Law

         F = k q₁ q₂ / r²

This electric force is in balance with tension.

We reduce the charge of sphere B to 1/5 of its initial value (q_{B}=q₂ = q₂ / 5) than new distance (d = n d₀)

dat

     q₁ = q_{A}

     q₂ = q_{B}

     r = d₀

In order for the deviation to maintain the electric force it should not change, so we apply the Coulomb equation for the two points

         F = k q₁ q₂ / d₀²

         F = k q₁ (q₂ / 5) / (n d₀)²

         .k q₁ q₂ / d₀² = q₁ q₂ / (5 n² d₀²)

          5 n² = 1

          n = √ 1/5

          n = 0.447

The new distance is

         d = 0.447 d₀

6 0
3 years ago
If the half life of an isotope is 20 years, how much of the original amount will
Feliz [49]

Answer:

Half

Explanation:

6 0
2 years ago
Read 2 more answers
What do you think would happen if a lamp close to the sensor was left turned on overnight?
LenKa [72]
The sensor would go off
8 0
3 years ago
Read 2 more answers
An object is released from rest and falls a distance h during the first second of time. How far will it fall during the next sec
Viefleur [7K]

Answer:

E. 3h

Explanation:

We know that

u = 0 m/s.

velocity after t = 1s

v = u+gt = 0+9.81 x 1s= 9.81 m/s

distance covered in 1st sec

= =>> ut+0.5 x g x t²

=>>0 + 0.5x 9.81 x 1 = 4.90m

Let 4.90 be h

distance travelled in 2nd second will now be used

So velocity after t = 1s

=>>1 x t+ 0.5 x g x t²

=>9.81x 1 + 0.5 x 9.81 x 1 = 3 x 4.90

So since h= 4.90

Then the ans is 3x h = 3h

3 0
3 years ago
When a fork is placed in a hot piece of lasagna, thermal energy is transferred up the fork by...
Gnom [1K]
Because it's placed in the lasagna, the thermal energy is transferred by conduction. Remember, convection is transfer of heat through fluids (liquids and gases), and radiation is just transfer of heat through air. 
5 0
3 years ago
Read 2 more answers
Other questions:
  • How can liquid pressure phenomena be used in daily life. Give one example with explanation of working​?
    5·1 answer
  • What is the net force acting on a golf car travelling at a constiant speed of 5 mph?
    13·2 answers
  • Which telescope would be better viewing a faint, distant star? Why?
    15·1 answer
  • The speed of a moving bullet can be deter-
    15·1 answer
  • In an arcade game a 0.117 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releas
    8·1 answer
  • When an object (like a ball) falls, some of its _____ energy changes to _____ energy, due to the law of conservation of energy
    13·1 answer
  • 1.25 is the closest to 1.04 or not I want to answer please. I think it's true, but I want to prove it scientifically, please.
    6·1 answer
  • In a photovoltaic system, an inverter is required to:.
    6·1 answer
  • What is the magnetic field due to a very very long wire with current A at a perpendicular distance 0.30000000000000004 m away fr
    8·1 answer
  • BRAINLIEST+10PTS: does ozone absorb just harmful UV rays? Or just a random portion of UV?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!