Water enters a baseboard radiator at 180 °F and at a flow rate of 2.0 gpm. Assuming the radiator releases heat into the room at a rate of 20,000 Btu/ hr., what is the temperature of the water leaving the radiator?

Answer:

322 Hz

Explanation:

v = speed of train approaching the railroad crossing = 80 km/h = 80 x 1000/3600 m/s = 22.22 m/s

V = speed of sound of the horn of train = 331.5 m/s

f = actual frequency of the sound from the horn = 300.0 Hz

f' = observed frequency of the horn

Using Doppler's effect, observed frequency is given as

f' = V f/(V - v)

inserting the values

f' = (331.5) (300.0)/(331.5 - 22.22)

f' = 322 Hz

Answer:

33 hours or equivalently: 1980 minutes

Explanation:

Use the formula for movement under constant velocity, as the velocity equal the distance traveled divided by the time it took, and solve for the unknown time (t):

which can also be given in minutes as : 33 x 60 = 1980 minutes

Final answer:

The total time taken by the octopus is 16.5 hours to swim 8 1/4 km, which is equivalent to 16 hours and 30 minutes.

Explanation:

Time is a fundamental concept that measures the progression of events and phenomena in the universe. It is a dimension in which events unfold sequentially, from past to present to future. Time is often measured in seconds, minutes, hours, days, and years and is a crucial component of our understanding of the physical world, providing a framework for organizing and comparing the durations of events and processes.

To find the time it takes for the octopus to swim 8 1/4 km, we divide the distance by the speed.

Time = Distance / Speed

= 8 1/4 km / 0.5 km/h = 16.5 hours.

Therefore, the octopus takes 16.5 hours to swim 8 1/4 km.

Since there are 60 minutes in an hour, we can convert the hours to hours and minutes. 16.5 hours is equivalent to 16 hours and 30 minutes.

Learn more about Time taken to swim a distance here:

brainly.com/question/32743661

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Answer:

That they must die

Explanation:

Stick = Die

Answer:

Explanation:

Using the principle of conservation of energy, the potential energy is converted to kinetic energy, assuming any losses.

Kinetic energy is given by ½mv²

Potential energy is given by mgh

Where m is the mass, v is the velocity, g is acceleration due to gravity and h is the height.

Equating kinetic energy to be equal to potential energy then

½mv²=mgh

V

Making v the subject of the formula

v=√(2gh)

Substituting 9.81 m/s² for g and 20 m for h then

v=√(2*9.81*20)=19.799 m/s

Rounding off, v is approximately 20 m/s

Answer:

19.8 m/s

Explanation:

During the motion of a pemdulum bob, it casually converts kinetic energy to potential energy and vice versa.

A pendulum bob reaches its maximum speed at a position closest to its equilibrium position and has its lowest when it is farthest from the equilibrium position.

The maximum speed of a pendulum bob based on the mass involved and the maximum displacement from the equilibrium position is obtained from

Maximum kinetic energy = Maximum potential energy

Maximum potential energy occurs at the farthest point from equilibrium, that is,

P.E(max) = mgh

Maximum kinetic energy = ½mv²

½mv² = mgh

v = √2gh

g = acceleration due to gravity = 9.8 m/s²

h = farthest height from equilibrium position = 20 m

v = √(2×9.8×20) = 19.8 m/s

Hope this Helps!!!