Answer:
A
Explanation:
What you write in your journals should be related to the topic. and it would be useful to look back on.
Answer:
1.5 m
Explanation:
Using the law of conservation of energy
Gain in potential energy by the skateboarder= Loss in kinetic energy by the skateboarder
PE=KE where KE represent potential energy, PE represent potential energy
where m is mass of skateboarder and v is velocity of skateboarder
PE=mgh where m is the mass of skateboarder, g is acceleration due to gravity which in this case is taken as and h is the highest point reached by the skateboarder. Equating PE=KE we have
and since m are on both LHS and LHS, the cancel
} and making h the subject of the above formula
Substituting v with 5.4 m/s and g as we obtain
Rounded off, h=1.5 m
Answer: At the period that's between its peaks of brightness and its luminosity.
Explanation:
The two observable properties of a cepheid variable that are directly related to one another at the period between its peaks of brightness and its luminosity. The period-luminosity relation allows us to determine its luminosity from the period between its peaks of brightness. In astronomy, a period-luminosity relation is a relationship linking the luminosity of pulsating variable stars with their pulsation period. The popular relation, for Classical Cepheid variables, is also called Leavitt's law
Answer:
F = 18 N
Explanation:
We have,
Mass of a dresser is 36 kg
Acceleration produce on the dresser is
It is required to find the force being applied on it. The force acting on an object is given by :
F = ma
So, the force of 18 N is applied to it.
Answer:
Explanation:
Hi!
In a (x, y) coordinate representation, the two forces are:
The sum of the two forces is:
The angle to x-axis is calculated using arctan:
The magnitude is: