Answer:
C: Solutions W and Y have greater solubility than solutions X and Z.
Explanation:
Temperature and pressure affect the solubility of a solution as follows:
- the higher the pressure, the greater the solubility (because more pressure means more collisions between the molecules, so this improves the solubility)
- the higher the temperature, the greater the solubility (because higher temperature means higher kinetic energy of the molecules, so more collisions, and so this improves the solubility)
Therefore, considering these two factors, the solutions with greater solubility must be W (which has high pressure) and Y (which has high temperature).
The magnitude of static friction force is f_s = 842.8 N
Explanation:
Write down the values given in the question
The wheel of a car has radius r = 0.350 m
The car applies the torque is τ = 295 N m
It is said that the wheels does not slip against the road surface,
Here we apply a force of static friction,
It can be calculated as
Frictional force f_s = τ / r
= 295 Nm / 0.350 m
f_s = 842.8 N
Answer:
Explanation: you can choose B or C but i would choose C
Answer:
The driver hits the stationery dog because the applied force is less than required force
Explanation:
Kinetic energy will be given by
where m is the mass of the vehicle and v is the speed/velocity of the vehicle.
Substituting 800 Kg for m and 20 m/s for v we obtain
Frictional force by vehicle pads is given by
where d is the distance moved
Substituting 160000 for KE and 50 m for d we obtain
Therefore, the vehicle hits the dog since the required force is 3200N but the driver applied only 2000 N
I believe the correct answer is A) From crest to crest.
~Silver
