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
liubo4ka [24]
3 years ago
7

Sand is made of tiny pieces of rock that have been worn

Physics
2 answers:
pav-90 [236]3 years ago
6 0
The formation of sand is physical damage because the rock that is worn down is basically broken. The rocks are broken.
PSYCHO15rus [73]3 years ago
5 0

Answer:

Sand is a form of physical change because it shows how one object is being worn out (broken down) into another object by nature.

Explanation:

You might be interested in
Which image shows an inclined plane?
Nadusha1986 [10]
The. 3rd one the ram of the bus
5 0
3 years ago
Read 2 more answers
A 50 kg child runs off a dock at 2.0 ms (horizontally) and lands in a waiting rowboat of mass 150 kg. At what speed does the row
Alex73 [517]

Answer:

The boat moves away from the dock at 0.5 m/s.

Explanation:

Hi there!

Since no external forces are acting on the system boy-boat at the moment at which the boy lands on the boat, the momentum of the system is conserved (i.e. it remains constant).

The momentum of the system is calculated as the sum of the momentum of the boy plus the momentum of the boat. Before the boy lands on the boat, the momentum of the system is given by the momentum of the boy.

momentum of the system before the boy lands on the boat:

momentum of the boy + momentum of the boat

m1 · v1 + m2 · v2 = momentum of the system

Where:

m1 and v1: mass and velocity of the boy.

m2 and v2: mass and velocity of the boat.

Then:

50 kg · 2.0 m/s + 150 kg · 0 m/s = momentum of the system

momentum of the system = 100 kg m/s

After the boy lands on the boat, the momentum of the system will be equal to the momentum of the boat moving with the boy on it:

momentum of the system = (m1 + m2) · v (where v is the velocity of the boat).

100 kg m/s = (50 kg + 150 kg) · v

100 kg m/s / 200 kg = v

v = 0.5 m/s

The boat moves away from the dock at 0.5 m/s.

5 0
3 years ago
Which one of the statements below is true about mechanical waves?
TEA [102]
They require a medium to travel through
5 0
2 years ago
A wave has a wavelength of 7 mm and a frequency of 9 hertz. What is its speed?
Snezhnost [94]
Speed of wave = Frequency x Wavelength
so Speed = 0.7 x 9 = 6.3

remember the calculations must be done in their Basic SI units.
therefore, you have to convert 7 mm to meters which becomes 0.7 meters

8 0
3 years ago
A. Use the graph and the element made in question 2 to determine the mass of the star.
Minchanka [31]
Black balls with blue waffles
4 0
3 years ago
Other questions:
  • Determine the current I flowing through a solenoid, if the magnetic flux inside its core is found to be 1.30 10-4 Wb. The radius
    14·1 answer
  • The Hubble space telescope has been maintained by which of these?
    14·1 answer
  • A surfer is actually traveling on which part of a surface wave
    5·2 answers
  • A taiga biome is DIFFERENT from a tundra biome because it has
    6·2 answers
  • How does enormous energy get released from the sun​
    11·1 answer
  • How long is a WiFi wavelength?<br><br> A) 10 cm<br><br> B) 12 cm<br><br> C) 15 cm <br><br> D) 20cm
    12·2 answers
  • A police officer uses a radar gun to determine the speed of a car. A specialized radar gun uses ultraviolet light to determine s
    15·1 answer
  • Question 7 of 10
    9·1 answer
  • 1. You take a trip to Philadelphia to see a concert. Your older friend drives you there. The
    14·1 answer
  • Two rocks, a and b, are thrown horizontally from the top of a cliff. rock a has an initial speed of 10 meters per second and roc
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!