Answer:
A. the magnitude of the velocity at which the two players move together immediately after the collision is 7.9m/s
B. The direction of this velocity is due north as the linebacker since he has obviously has more momentum
Explanation:
This problem bothers on the inelastic collision
Given data
Mass of linebacker m1= 110kg
Mass of halfbacker m2= 85kg
Velocity of linebacker v1= 8.8m/s
Velocity of halfbacker v2= 7.2m/s
Applying the principle of conservation of momentum for inelastic collision we have
m1v1 +m2v2= (m1+m2)v
Where v is the common velocity after impact
Substituting our data into the expression we have
110*8.5+85*7.2= (110+85)v
935+612=195v
1547=195v
v=1547/195
v=7.9m/s
Momentum of linebacker after impact = 110*7.9= 869Ns
Momentum of halfbacker after impact = 85*7.9= 671.5Ns
the direction after impact is due north since the linebacker has greater momentum
Answer:
9.79211 m/s²
Explanation:
M = Mass of the Earth = 5.972 × 10²⁴ kg
G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²
r = Radius of Earth = 6378000 m
The acceleration due to gravity is 9.79211 m/s²
For any distance above the Earth's surface h
<h2>
Answer: D. Salinity level and temperature</h2>
Explanation:
The density of the water is given by a relation between its mass and its volume :
Isolating the volume:
This means the <u>volume of the water will depend on its mass and its density</u>.
In this sense, the two factors that affect the volume of seawater are <u>salinity level and temperature.
</u>
This is because the salinity (<u>amount of salt in water</u>) changes the its mass and its density, therefore its volume. The higher the salinity, the greater the volume.
In the case of temperature, when it increases, the volume of water also increases and when the temperature decreases, the volume also decreases.
The solubility of the sample will decrease
The error in the measurement of sin 90 degrees at the given error in angle is 0.001.
<h3>
Error in measurement</h3>
The error in measurement is obtained from the difference between the actual measurement and the observed measurement.
The error of sin 90 degrees is calculated as follows;
Actual measurement = sin 90 = 1
Observed measurement = sin(90 - 0.5)
Observed measurement = sin(89.5) = 0.999
<h3>Error in measurement of sin 90 degrees</h3>
<em>Error in measurement = Actual measurement - Observed measurement </em>Error in measurement = 1 - 0.999
Error in measurement = 0.001
Thus, the error in the measurement of sin 90 degrees at the given error in angle is 0.001.
Learn more about error in measurement here: brainly.com/question/26668346