Thes are all correct :<span>2.Scientists observe natural events occurring around them. They question these observations and investigate them.
3.All scientists follow one scientific method of investigation
4.If a hypothesis is not verified by the results from the scientific method, scientists may either redo the process or create a new hypothesis.</span>
Answer:
the rock will sink. this is because it is more dense than water
Answer:
2.461
Explanation:
Let mass of Bonzo = m1
Mass of Ender =m2
When they push eachother from stationary position
Initial velocity of Bonzo = Vib=0 m/s
Final velocity of Bonzo = Vfb= 1.3 m/s
Initial velocity of Ender = Vie= 0 m/s
Final velocity of Ender = Vfe= -3.1 m/s
We know initial momentum = final momentum
==> m1Vib+m2Vie = m1Vfb+m2Vfe
==> 0+0= m1×1.3 +m2×(-3.1)
==> 1.3m1-3.1m2=0
==> 1.3 m1 = 3.2 m2
==> m1/m2 = 3.2/1.3
==> m1/m2 = 2.461
Answer:
#_cars = 7
Explanation:
For this exercise let's start by finding the total number of students
#_students = 12 +15
#_students = 27
Now we can use a direct proportion relationship or rule of three. If 4 students drive, how many cars for 27 students?
#_cars = 27 (¼)
#_cars = 6.75
the number of cars must be an integer therefore the correct answer is
#_cars = 7
Answer: The distance between the charges is r=0.44m
Explanation
Step one
Using the formula
F = (k q1*q2) /r²
F = electric force
k = Coulomb constant
q1, q2 = charges
r = distance of separation
Step two
Given data
F=179N
q1 and q2=+68.0 µC and +56.0 µC
k=8.98755 × 10^9 N
r=?
Step three
Inputting our values we have
179=8.9875×10^9(68*10^-6*56*10^-6)/r²
179=(8.9875*10^9*3.8*10^-9)r²
179=34.15/r²
Make r subject of formula we have
r²=34.15/179
r²=0.190
r= √0.190
r=0.44m
Coulomb's law states that: The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them.