Find the amount of energy (Q) required to raise the temperature of the water in kilo joules (KJ).
Given mass of water m = 2kg = 2000g.
Temperature difference ΔΤ = T2 – T1 = 60 °C – 25 °C = 35 °C .
Specific heat of water = 4.18 J/g* °C .
Therefore, Q =
kilo joules.
Amount of energy required = 292.6 kJ
Explanation:
Amount of energy required is given by the equation ,
Q = m × C ×ΔT
where m is the mass of the water = 2000 g
C is the specific heat of water = 4.18 J/g°C
ΔT = Temperature difference = 60 - 25 = 35 °C
Applying these values in the above equation, we will get,
Q = 2000 g × 4.18 J/g°C × 35°C
= 292600 J
When joule is divided by 1000 we will get the amount of energy in kJ.
[tex]$ Q = \frac{292600}{1000} = 292.6 kJ[/tex]
So the energy required to raise the temperature of the water is 292.6 kJ.
An ice hockey player is skating on an ice rink. The rink has a coefficient of kinetic friction of roughly 0.1. If the normal force on the hockey player is 800. N, what is the frictional force acting on the hockey player?
Answer:
The frictional force acting on the Hockey player = 80 N.
Explanation:
Given,
coefficient of kinetic friction = 0.1
Normal force on the hockey player = 800 N.
Frictional force acting on the hockey player = ?
Frictional force acting on the hockey player ca be calculated using the formula,
Frictional force = coefficient of kinetic friction x Normal force
substituting the values,
Frictional force = 0.1 x 800 = 80 Newtons.
Therefore, Frictional force acting on the Hockey player = 80 N.
Practicing new things strains your brain fibers, weakening your ability to make connections.
A) True
B) False
Answer:
B
Explanation:
Practicing new things only makes your brain stronger
7. A single-pole GFCI breaker is rated at
a. 120VAC
b. 240VAC
c. 120/240VAC
d. 240/480VAC
List four things that should be done during a thorough inspection of the brake fluid.
1. How many pieces of 12-1/2" long wood can be cut from a piece of
wood that is 39-3/4" long? *
o A. 2
o B.3
o C.6
OD.7
A sailboat is operating under sail at night. Which of these lights should be used?
orange masthead light
blue sternlight
yellow masthead light
white sternlight
Answer:
White Stern light
Explanation:
According to boating regulations, navigation lights must be used for safety purposes when operating water vessels especially during the night.
The boating regulations for operating sailboats, specify that a white stern light must be used during hours from sunset to sun rise. This is to indicate the presence of the sea craft on the ocean, as well as its direction.
A stern light is a white light placed as closely as practical at the stern shining constantly. It covers an angle of 135 degrees, and helps show the direction of the boat.
The lights should be used is white sternlight.
What lights should be used in a sailboat at night?A sailboat is operating under sail at night is known to be one where the operator of that sailboat is said to be operating under sails at darkness and so their sidelights should be (red - green) and stern light (white).
When they are said to be less than 20 meters in length, the three lights can be use altogether at or near the top of the mast.
Learn more about lights from
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1.) Explain the job description of a Civil Engineer...
Answer:
They create, improve, and protect the environment that us humans live in. They oversee the way something's may look like construction for example, they plan and then design. This can do with any type of new construction for anything. Basically, they try to help design things that can improve and protect our world and daily living.
1. Consider the steady flow in a water pipe joint shown in the diagram. The areas are:
A1=0.2 m², A2=0.2 m², and Az=0.15 m². In addition, Fluid is lost out of a hole at
section 4, estimated at a rate of 0.1m/s. The average speed at section 1 and 3 are
Vi=5m/s and V3=12m/s, respectively. Find the velocity at section 2.
Answer:
-4.5 m/s
Explanation:
Assuming steady and incompressible flow and uniform properties at each section
[tex]V_1A_1+V_2A_2+A_3V_3+Q_4=0[/tex]
Here V is velocity of flow and A is area, Q is flow rate out of the leak, subscript 1-4 represent different sections
At the surface, is negative hence the equation above will be
[tex]-V_1A_1+V_2A_2+A_3V_3+Q_4=0[/tex]
Making the subject of the formula then
[tex]V_2=\frac {V_1A_1-A_3V_3-Q_4}{A_2}[/tex]
Substituting the given values then
[tex]V_2=\frac {(5\times 0.2)-(12\times 0.15)-0.1}{0.2}=-4.5 m/s\\V_2=-4.5m/s[/tex]
Find the probability that at most five defective fuses will be found in a box of 200 fuses in experience shows that 2% of such fuses are defective
The answer is b. I have attached a photo of the explanation.
When your car is broken down on the side of the road, you should make your vehicle as _____ as possible. A. visible B. comfortable C. cooled D. loud
Answer:
A
Explanation:
If you're car brokebroke down and you may want people to see it so you can get help right away in case you are hurt.
The car broken down on the road, must be made more and more visible. Thus, option A is correct.
What is the importance of driver consciousness in broken car case?The driver is responsible for his actions on the road, and thereby was found with the awareness to the traffic safety. In case the car is broken and not made visible, it may lead to the number of road accidents.
Thus, the car must be made visible on the side of the road in case it is broken down to avoid the accidents and raise help. Thus, option A is correct.
Learn more about traffic awareness, here:
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#SPJ2
Just getting to your class is enough for showing up.
A) True
B) False
Answer:
A
Explanation:
If you are having a hard day, that could be all that you are capable of