Answer: Car brakes produces more energy then the bicycle because the cars wheels produces a much bigger force that makes the car go and to stop that force the car uses greater amount of energy that transfers to heat but in a bicycle the wheels do not turn that fast so when you press the break there is less energy that transfer to heat.
Explanation:
Kinetic energy<span> is the </span>energy<span> of motion. An object that has motion - whether it is vertical or horizontal motion - has </span>kinetic energy<span>. It is expressed as:
KE = mv^2 /2
720 = 10.0v^2 /2
v = 12 m/s
Hope this answers the question. Have a nice day.</span>
The force of attraction between the two particles will remain the same, because when mass is doubled, force of attraction is doubled. However, when distance between their centers is doubled, then force of attraction is halved. As such double and half cancel out each other and force of attraction remains the same.
Answer:
Combustibility is a measure of how easily a substance bursts into flame, through fire or combustion. This is an important property to consider when a substance is used for construction or is being stored. It is also important in processes that produce combustible substances as a by-product.
Explanation:
Answer:
The variation is inversely proportional to the decrease density
Explanation:
This is an exercise where we will use the Archimedes principle that states that the thrust is equal to the weight of the dislodged liquid
B = m g
ρf = m / Vf
m = ρf Vf
B = ρf Vf g
If we use Newton's second law for equilibrium
B - W = 0
B = m g
ρ Vf g = ρb Vb g
ρb / ρf = Vf / Vb (1)
Let's apply this expression to our case
In water
Vf / Vg = 0.90
replace in equation 1
ρb / ρf = 0.90
ρb = ρf 0.90
ρb = 1000 0.90
ρb = 900 kg / m3
Now we change the liquid to one with lower density, let's calculate the volume ratio
Vf / Vg = ρb / ρf
The density of the body (ρb) remains constant if the density of the fluid decreases, as in the denominator the volume fraction increases, whereby the submerged part decreases
The variation is inversely proportional to the decrease density
