Before we solve, let's use our formula for speed.
Speed is defined as distance divided by time.
S = D/T
We have 119m and 28s.
Our distance is 119m.
Our time is 28s.
Plug these numbers into the formula.
S = 119/28
Divide 119 by 28 to get our speed.
119/28 = 4.25.
Our speed is 4.25 m/s.
I hope this helps!
Answer:
-3,89
Explanation:
First to consider is that the reaction is raising the temperature of the solution, so it's an exothermic reaction.
The enthalpy can be calculated by the following equation:
First we need to calculate the mass using the density and the volume:
⇒
Then we have Cp = 3,74 Joules/gram°K ΔT = -3,33 °C (cause of exothermic reaction)
Replacing in the formula:
The first choice on the list is the correct one.
Complete Question
The complete question is shown on the first uploaded image
Answer:
The mass is
Explanation:
From the question we are told that
The mass of the stars are
The orbital speed of each star is
The orbital period is
The centripetal force acting on these stars is mathematically represented as
The gravitational force acting on these stars is mathematically represented as
So
=>
=>
=>
=>
The distance traveled by each sun in one cycle is mathematically represented as
Now this can also be represented as
Therefore
=>
=>
So
=>
=>
Explanation:
It is given that,
Initial speed of a golfer, u = 29 m/s
If it travels the maximum possible distance before landing. It means that it is projected at an angle of 45 degrees.
(a) We need to find the time spent by the ball in the air. It can be calculated by using second equation of motion.
Here,
a = -g
s = 0 (it is displacement and it is equal to 0 as the ball lands on the green).
So,
So, it will take 4.184 seconds in the air.
(b) let x is the longest hole in one that the golfer can make if the ball does not roll when it hits the green. It can be given by :
Hence, this is the required solution.