A 150 g sample of brass at 100 °C is placed in a Styrofoam cup of water containing 120 mL of water at 10 °C. No heat is lost to
1 answer:
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Answer:
Explanation:
The given equation is where
denotes initial time in the stopwatch and
denotes the distance covered by car.
As the judge starts her watch at the instant the car passes the 2.0 meter mark and the judge reads 3.9 seconds on her stopwatch when the car passes the 8.0 meter mark.
Put in equation
Answer:
nothing, mass is not affected by gravitational force
Explanation:
Weight is the gravitational force a planet exerts on a mass on the surface.
It is the product of the mass of an object with the gravitational acceleration that the planet produces.
The weight is the gravitational force
where,
m = Mass of the object
g = Acceleration due to gravity = 9.81 m/s²
Mass is the property that matter has which opposes the force being applied to it. It is intrinsic to the object itself and does not change according to the gravitational force. But, the weight changes.
Answer:
Mininmum acceleration required =
Explanation:
Given,
Lift off speed = 125km/hr.
We know km/hr conversion factor to m/s is ,
Therefore,
Lift off speed required = m/s
Lift off speed required = 34.72222 m/s
Length of Takeoff Run given = 220 m.
So,
the flight needs to achieve its takeoff speed at a constant acceleration before it reaches the end of the 220 m runway.
Consider the formula from kinematics,
,
where,
v - final velocity of particle,
u - initial velocity of particle
a - the constant acceleration at which the particle is moving with
s - distance travelled by particle
So at minimum acceleration,it reaches the takeoff speed at the end of the runway.
Therefore in the formula,
we use, v = Lift off speed = 34.72222 m/s;
u = 0 m/s (plane starts from rest);
a = minimum acceleration of the plane
s = 220 m;
Substituting these values in the formula, we get,
a =
a = .
Therefore,the minimum acceleration of the plane required = .