Answer:
1503 km
Explanation:
Distance is speed multiply times. We can express mathematically as:
where s is distance, v is speed and t is time. We know that speed is 501 km/h and t is 3 hours. Therefore, substitute v = 501 and t = 3 in:
Therefore, the train will be able to reach 1503 km within 3 hours.
Answer:
a = 7.4 m / s²
Explanation:
The centripetal acceleration of an object that has constant speed is
a = v² / r
linear and angular velocity are related
v = w r
let's substitute
a = w² r
the angular velocity is related to the period
w = 2π / T
we substitute
a =
let's calculate
a = 4π² 3.00 /4²
a = 7.4 m / s²
Answer:
v = 8[m/s]
Explanation:
In this case, the work that is exerted on the cart is the kinetic energy that allows the movement, so we can use the following equation of kinetic energy.
Now replacing:
Answer:
23.99N
Explanation:
Given:
Pressure created by the heart = 120mm of hg
converting the pressure into the standard unit of N/m²
1mm of hg =
now, 120 mm of hg in N/m² will be
120mm of hg =
also
given effective area = 15.0 cm² = 15 × 10⁻⁴m²
Now,
Force = Pressure × Area
thus,
Force exerted will be = × 15 × 10⁻⁴m²
or
Force exerted will be = 23.99N