Answer:
the answer is a. a ball is moving towards the camera faster then slower
According to the inverse square law of light, <span>apparent brightness will decrease by a factor of 9. Use the formula </span>
, to check it.
Answer:
a) uranium
b) deuterium
Explanation:
For the first question, you can actually know this by simple logic. The nucleus of Ucranium, has more energy than a pair of deuterium. Ucranium has a mass number and atomic mass higher than deuterium, therefore, when you do a fission with ucranium in it's nucleous, this would be in energy higher than the deuterium.
However, in terms of mass only, the fissioning of 1 gram of Deuterium will produce more energy than 1 gram of uranium, basically because deuterium is lighter and has a lower molecular weight than ucranium. This means that because of this lower molecular weight, in 1 gram of deuterium will contain more number of atoms than in 1 g of uranium. The interaction with these atoms, will produce more energy than the energy produced by uranium.
Answer:
Your answer is: False
It is called a resting heart rate for a reason : )
Explanation:
Hope this helped : )
Answer:
The maximum speed is 23.39m/s
Explanation:
Centripetal force Fc is the force acting on a body moving in a circular path and directed towards the centre of the path.
If F = ma
centripetal acceleration a = v²/r
Centripetal force Fc = mv²/r ... (1)
where;
m is the mass of the object
r is the radius.
Since there is friction between the tyre and the road, then the frictional force Ff acts between the surface and this frictional force is the one that tends to oppose the moving force (centripetal force)
Ff = μsR where
μs is the coefficient of static friction
R is the normal reaction which is also equivalent to the weight of the car i.e R = W = mg
Ff = μsmg ... (2)
For the body to be static, the centripetal force must be equal to the frictional force i.e Fc = Ff
mv²/r = μsmg
Making v the subject of the formula;
v²/r = μsg
v² = μsgr
v = √μsgr
Given the following data;
μs = 0.6
g = 9.81m/s²
r = 93.0m
v = √0.6×9.81×93
v = √547.398
v = 23.39m/s
