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
natta225 [31]
3 years ago
8

If the mass of a material is 42 grams and the volume of the material is 15 cm^3, what would the density of the material be?

Physics
1 answer:
Fantom [35]3 years ago
3 0

Density = mass / volume

Density = 42g / 15cm^3

Density = 2.8g/cm^3

You might be interested in
A skier is skiing down a slope on the mountain.
uysha [10]

The mechanical energy isn't conserved. Some energy is lost to friction.

Option A.

<h3><u>Explanation:</u></h3>

The mechanical energy is defined as the energy of a body which it achieves by virtue of its position and velocity. The mechanical energy are of two types - potential energy and kinetic energy. The potential energy is the energy of the body which it achieves by means of its relative position and is directly proportional to the height of the body from its relative plane. Whereas the kinetic energy of the body is achieved by virtue of its velocity and is directly proportional to the square of velocity of the body.

As the mountaineer is skiing down the slope of a mountain, the potential energy of the person is gradually changing into his kinetic energy. Had it been in an ideal situation, the potential energy lost would have been just equal to the kinetic energy gained by the person. But there's friction which opposes the speed of the body and reduces the velocity. Thus the kinetic energy will be lost to some extent and the energy won't be conserved.

4 0
3 years ago
Which image illustrates why dark clothing helps to keep you warm on a cool, sunny day?
xeze [42]

Answer:

Explanation:

I suppose it has to do with the way the diagram is drawn. The heat does not reflect which makes both A and B incorrect.

C would have nothing to do with either reflection or refraction.

That only leaves D which is the answer.

7 0
3 years ago
Read 2 more answers
An object starts from rest and uniformly accelerates at a rate of 1.25 m/s2 for 7.0 seconds.
stich3 [128]

Explanation:

Since its accelerating, the velocity vs time graph is linear

For displacement we need initial velocity (which is zero because it starts from rest) and final velocity (which is calculatee thro acceleration formula

A= (vf - vi)/t

a= vf-0/t

1.25=vf / 7

1.25*7=vf

8.75 = vf

Now for displacement plug all the values in

X = 1/2(vf-vi)/t formula

The displacement (x) is 30.625 m

For part 3, we know new displacement that is 22m , the final and initial velocities are the same so just plug in the values for same formula above

The answer is t = 5.02

Im pretty sure all the answers are correct

8 0
2 years ago
Differentiate x sin nx
Sedaia [141]

Answer:

x sin nx = x cos nx

same as

theta  / theta x    (xsin (nx)) = sin (nx) + (nx) cos (nx)

7 0
2 years ago
Read 2 more answers
What two factors affect the speed of a sound wave as it travels through a medium ?​
iragen [17]
The material that makes up the medium such as air or water and the temperature.
6 0
3 years ago
Other questions:
  • A periodic longitudinal wave that has a frequency of 19.0 hz travels along a coil spring. if the distance between successive com
    15·1 answer
  • Complete the blanks and tell the reaction force
    8·1 answer
  • Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. when they hit the ground
    12·1 answer
  • Which layer in the Earth has a composition similar to the granite shown in this photograph?
    6·1 answer
  • 1. What are the 3 spheres of Earth?
    12·1 answer
  • Microwave ovens emit microwave energy with a wavelength of 12.1 cm. What is the energy of exactly one photon of this microwave r
    7·1 answer
  • A coil of resistance 100ohm is placed in a magnetic field of 1mWb the coil has 100 turns and a galvanometer of 400ohm resistance
    13·1 answer
  • Please help OwO .....
    8·1 answer
  • Can anyone help me out with conservation of energy
    9·1 answer
  • A
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!