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
prisoha [69]
3 years ago
12

(1) Arectangularmetal block with mass 18 kg has

Physics
1 answer:
sleet_krkn [62]3 years ago
8 0

Answer:

Volume=0.003m^3 density=6000kg/m^3

Explanation:

mass=18kg

volume=length x width x height

Volume of block=0.1x0.15x0.2

volume of block=0.003m^3

Density=mass ➗ volume

Density=18 ➗ 0.003

Density=6000kg/m^3

You might be interested in
A security guard walks at a steady pace traveling 170 m in one trip around the perimeter of a building.
WARRIOR [948]
Speed= distance/time
Speed= 170/230
Speed=0.74 m/s
6 0
3 years ago
The closest stars are 4 light years away from us. How far away must you be from a 854 kHz radio station with power 50.0 kW for t
Lubov Fominskaja [6]

Answer:

The distance from the radio station is 0.28 light years away.

Solution:

As per the question:

Distance, d = 4 ly

Frequency of the radio station, f = 854 kHz = 854\times 10^{3}\ Hz

Power, P = 50 kW = 50\times 10^{3}\ W

I_{p} = 1\ photon/s/m^{2}

Now,

From the relation:

P = nhf

where

n = no. of photons/second

h = Planck's constant

f = frequency

Now,

n = \frac{P}{hf} = \frac{50\times 10^{3}}{6.626\times 10^{- 34}\times 854\times 10^{3}} = 8.836\times 10^{31}\ photons/s

Area of the sphere, A = 4\pi r^{2}

Now,

Suppose the distance from the radio station be 'r' from where the intensity of the photon is 1\ photon/s/m^{2}

I_{p} = \frac{n}{A} = \frac{n}{4\pi r^{2}}

1 = \frac{8.836\times 10^{31}}{4\pi r^{2}}

r = \sqrt{\frac{8.836\times 10^{31}}{4\pi}} = 2.65\times 10^{15}\ m

Now,

We know that:

1 ly = 9.4607\times 10^{15}\ m

Thus

r = \frac{2.65\times 10^{15}}{9.4607\times 10^{15}} = 0.28\ ly

5 0
2 years ago
Is metal denting a physical change
Scilla [17]
No it is a chemical change
7 0
2 years ago
What cause earthquakes?
KengaRu [80]
Question; what causes earthquakes? 
Answer; what causes earthquakes are mainly when rocks are underground and then suddenly break along a fault. 
6 0
3 years ago
Read 2 more answers
A stuntman is being pulled along a rough road at a constant velocity by a cable attached to a moving truck. The cable is paralle
Alex73 [517]

Answer:

715 N

Explanation:

Since the system is moving at a constant velocity, the net force must be 0. The tension on the road is equal and opposite direction with the kinetic friction force created by the road and the stuntman.

Let g = 9.8 m/s2

Gravity and equalized normal force is:

N = P = mg = 107*9.8 = 1048.6 N

Kinetic friction force and equalized tension force on the rope is

T = F_{\mu} = N\mu = 1048.6 * 0.682 = 715.1452 N

6 0
2 years ago
Other questions:
  • What is a factor that affects the outcome of an experiment?
    6·2 answers
  • A 3.50 kg block is pushed along a horizontal floor by a force of magnitude 15.0 N at an angle θ = 30.0° with the horizontal. The
    7·1 answer
  • Which of the following statements is correct regarding transformers?
    12·2 answers
  • One game at the amusement park has you push a puck up a long, frictionless ramp. You win a stuffed animal if the puck, at its hi
    6·1 answer
  • You will have to zoom in to read it better
    9·1 answer
  • As the result of a thermal inversion the prevailing air temperature profile increases 1°C/100m above the ground level. To what m
    8·1 answer
  • gabriel and arely have performed an experiment and are not sure their results are valid. what should they do to check their resu
    11·2 answers
  • Describe what is happening to the speed during the period (I). 0s - 10s __________________________________________________ (II).
    11·1 answer
  • The resultant of three vectors is 90.00 cm 34o N of W. If two of these three vectors are 17.89 cm 27o W of S, and 36.00 cm NW, w
    13·1 answer
  • a person jogs eight complete laps around a 400-m track in a total time of 15.1 min .calculate the average speed, in m/s .
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!