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
olga55 [171]
3 years ago
15

Which describes the reaction of a substance to form one or more new substances?

Physics
1 answer:
kifflom [539]3 years ago
3 0
A chemical change is the correct
You might be interested in
(1) Expansion of concrete
Pachacha [2.7K]
Abcdefghijklmnopqurtuv
6 0
3 years ago
An object that travels around another object in space is called?
dalvyx [7]
An object that travels around another object in space, is called a Satellite. 
5 0
3 years ago
Calculate the power rating of a home appliance (in kilowatts) that uses 5.1 amps of current when plugged into a 120 Volt outlet.
Mrrafil [7]

Answer:0.612 kilowatts

Explanation:

Current=5.1 amperes

Voltage=120 volts

Power=current x voltage

Power=5.1 x 120

Power=612

power=612 watts

power=612/1000 kilowatts

Power=0.612 kilowatts

4 0
4 years ago
A skull believed to belong to an ancient human being has a carbon-14 decay rate of 5.4 disintegrations per minute per gram of ca
larisa86 [58]

Answer:

9.43*10^3 year

Explanation:

For this question, we ought to remember, or know that the half life of carbon 14 is 5730, and that would be vital in completing the calculation

To start with, we use the formula

t(half) = In 2/k,

if we make k the subject of formula, we have

k = in 2/t(half), now we substitute for the values

k = in 2 / 5730

k = 1.21*10^-4 yr^-1

In(A/A•) = -kt, on rearranging, we find out that

t = -1/k * In(A/A•)

The next step is to substitite the values for each into the equation, giving us

t = -1/1.21*10^-4 * In(5.4/15.3)

t = -1/1.21*10^-4 * -1.1041

t = 0.943*10^4 year

8 0
4 years ago
A sled and rider (combined mass of 69 kg) finish a downhill run with a speed of 30 m/s, then enter a flat (horizontal) area wher
NARA [144]

Answer:

Distance that sled move while slowing down= 195.65m

Explanation:

Distance traveled by sled after slowing down=S

acceleration at the start= -2.3 m/s2

initial speed u=30m/s

final speed=v

By using the equation

v^{2} =u^{2} +2as\\

Final speed is zero.

Therefore;

0=30^{2} +2*(-2.3)*s\\2*2.3s=30^{2} \\s=30^{2} /(2*2.3)\\s=195.65 m

6 0
3 years ago
Other questions:
  • Which statement best compares the properties of compounds and elements that the compounds contain?
    11·1 answer
  • What are the parts of a cell? How do cell part work together to keep the cell alive?
    12·1 answer
  • Which statement correctly differentiates between transmitters and receivers?
    8·2 answers
  • Which of the following is an example of acceleration?
    15·1 answer
  • An athlete grips a light rope that passes over a low-friction pulley attached to the ceiling of a gym. A sack of sand precisely
    12·1 answer
  • A horizontal force of magnitude 46.7 N pushes a block of mass 4.35 kg across a floor where the coefficient of kinetic friction i
    12·1 answer
  • If you have a positive electrical force, and a negative electrical force, what do you expect will happen?
    8·1 answer
  • 75 points please answer ASAP what kind of enrgy is required for photosynthesis to occur
    7·2 answers
  • If a person walks 3 m north and 5 meters east, how would you find the displacement for that person? what would the displacement
    13·1 answer
  • Through which of the following would sound travel fastest?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!