Answer: C) The water started out lower than 40°C
Explanation: I saw no answer so I decided to help out and go ahead and answer the question myself to see what the right answer was. :)
Answer:
acceleration: 5.48 m/s²
time taken: 9.3 seconds
Given:
- mass: 1200 kg
- force: 6572 N
- initial velocity: 15 m/s
- final velocity: 66 m/s
<u>using the formula's</u>:
<u>answer 1</u>:
// rounded to nearest hundredth //
<u>answer 2</u>:
// rounded it to nearest tenth //
Answer:
In-car temperature is controlled in a variable displacement compressor system by varying the capacity of the <em>refrigeration</em> not by cycling the <em>compressor </em>on and off.
Explanation:
A Variable Displacement Compressor (VDC) works in a separate and rather more efficient manner than the fixed displacement compressor (FDC). <em>The VDC automatically regulates the cooling effect of the refrigerator by changing its pumping capacity by means of a "wobbling piston" system. </em>
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During times of peak load, the refrigeration pumping capacity is increased, delivering a large flow rate of refrigerant, thus giving a high refrigerating effect. The reverse happens during times of load refrigeration load.
<em>The fixed compressor tries to vary the temperature of the car by simply switching off the compressor</em>, and turning it on during times of low and peak loads.
Answer:
<em>The velocity after the collision is 2.82 m/s</em>
Explanation:
<u>Law Of Conservation Of Linear Momentum
</u>
It states the total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and speed v is
P=mv.
If we have a system of two bodies, then the total momentum is the sum of the individual momentums:
If a collision occurs and the velocities change to v', the final momentum is:
Since the total momentum is conserved, then:
P = P'
Or, equivalently:
If both masses stick together after the collision at a common speed v', then:
The common velocity after this situation is:
There is an m1=3.91 kg car moving at v1=5.7 m/s that collides with an m2=4 kg cart that was at rest v2=0.
After the collision, both cars stick together. Let's compute the common speed after that:
The velocity after the collision is 2.82 m/s
At temperatures above 0 K, the electron concentration in the conduction band is non-zero because some electrons from the valence band will overcome the bandgap by gained thermal energy. The correct option is D.
<h3>What are electrons?</h3>
The electrons are the spinning objects around the nucleus of the atom of the element in an orbit.
Consider an ideal intrinsic semiconductor in thermal equilibrium. No external forces or fields are applied to this semiconductor. At temperatures above 0 K, the electron concentration in the conduction band is non-zero because some electrons from the valence band will overcome the bandgap by gained thermal energy.
The semiconductors are free from impurities. At room temperature. Some electrons ion valence band gains energy and cross the bandgap. They get transferred to the conduction band.
Thus, the correct option is D.
Learn more about electrons.
brainly.com/question/1255220
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