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The amount of heat rejected by a heat pump to the high-temperature reservoir will always be greater than the amount of heat absorbed from the low-temperature reservoir. The statement is true.

A heat pump is a device that uses a refrigeration cycle to transfer thermal energy from the outside to heat a building. Many heat pumps can also be used to cool a building by removing heat from the enclosed space and rejecting it outside.

Given the statement, the amount of heat rejected by a heat pump to the high-temperature reservoir will always be greater than the amount of heat absorbed from the low-temperature reservoir is true.

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Answer:

jh7j7j678j

Explanation:

[tex]-\frac{\sqrt{(x^{\frac{1}{2} }+1)(x^{\frac{1}{2} }-1) } }{x^{\frac{1}{2} }-1}[/tex]

[tex] \huge \fbox \colorbox{teal}{ANSWER:-}[/tex]

Newton's Third Law of Motion states: 'To every action there is an equal and opposite reaction'. ... The Third Law of Motion indicates that when one object exerts a force on another object, the second object instantaneously exerts a force back on the first object.

The velocity of the car at the end of the initial 1.70-second interval is 25.6 m/s  

Let's evaluate every step

1. Step 1

[tex]v_{i}_{1}[/tex]: initial velocity at step 1 = 30.6 m/s

[tex]v_{f}_{1}[/tex]: final velocity at step 1

[tex]t_{1}[/tex]: time at step 1 = 1.70 s

[tex]a_{1}[/tex]: average acceleration at step 1

The average acceleration in this step is given by:

[tex] a_{1} = \frac{v_{f_{1}} - v_{i_{1}}}{t_{1}} [/tex]   (1)      

2. Step 2

[tex]v_{i}_{2}[/tex]: initial velocity of step 2 = [tex]v_{f}_{1}[/tex]

[tex]v_{f}_{2}[/tex]: final velocity at step 2    

[tex]t_{2}[/tex]: time at step 2 = 4.56 s

[tex]a_{2}[/tex]: average acceleration at step 2

The average acceleration is the following:

[tex] a_{2} = \frac{v_{f_{2}} - v_{i_{2}}}{t_{2}} [/tex]   (2)            

3. Step 3          

This step is given by the sum of step 1 and step 2

[tex]v_{f}[/tex]: final velocity after 6.26 s = 17.0 m/s = [tex]v_{f}_{2}[/tex]

t = t₁ + t₂ = 1.70 s + 4.56 s = 6.26 s  

The ratio of the average acceleration is:

[tex] \frac{a_{1}}{a_{2}} = 1.55 [/tex]  (3)

By dividing equation (1) into equation (2) we have:

[tex] \frac{a_{1}}{a_{2}} = \frac{\frac{v_{f_{1}} - v_{i_{1}}}{t_{1}}}{\frac{v_{f_{2}} - v_{i_{2}}}{t_{2}}} [/tex]

[tex] \frac{a_{1}}{a_{2}} = \frac{t_{2}(v_{f_{1}} - v_{i_{1}})}{t_{1}(v_{f_{2}} - v_{f_{1}})} [/tex]                

By solving the above equation for [tex]v_{f_{1}}[/tex] we have:

[tex]v_{f_{1}} = \frac{\frac{a_{1}}{a_{2}}v_{f_{2}}t_{1} + v_{i_{1}}t_{2}}{\frac{a_{1}}{a_{2}}t_{1} + t_{2}} = \frac{1.55*17.0 m/s*1.70 s + 30.6 m/s*4.56 s}{1.55*1.70 s + 4.56 s} = 25.6 m/s[/tex]

Therefore, the velocity of the car at the end of the initial 1.70-second interval is 25.6 m/s.  

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Answer:

tan theta = H / B        where H is height of triangle and B the length of base

H1 = 87 * tan 25 =  40.6 feet

H2 = 87 * tan 40 = 73 feet

H2 - H1 = 32.4 feet

Answer:

m uncertainty percentage :

+- 2.5

+- 7.5

+- 12 5

+- 17.5

+- 25

+- 30

M uncertainty percentage = 16.5

m + M uncertainty percentage;

+- 19

+- 24

+- 29

+-34

+- 41.5

+- 46.5

ex 50 × 5 ÷100 = 2.5

Explanation:

The working principle of a washing machine is centrifugation .

Answer:

The correct option is C) centrifugation

Explanation:

The washing machine consists of a centrifuge for this purpose. A centrifuge is a piece of equipment that puts an object in rotation around a fixed axis, applying a force perpendicular to the axis of spin that can be very strong.

Answer:

  distance traveled

Explanation:

Assuming he ends where he started, his displacement is zero, while his distance traveled is 17 +13 +137 = 167 km. He would want to be paid by distance traveled.

Answer:

The independent variable is that entered by the researcher - it does not depend on anything else in the equation

The dependent variable is the result obtained by applying the equation to the independent variable

One variable is entered by the researcher giving rise to the second variable.

In the study given the intensity depends on the average water temperature.

The independent variable is the water temperature and the dependent variable is the maximum strength of the hurricane

In scientific research processes there are several types of variables

 * Those that can be controlled or manipulated by researchers, these are called independient variable  

* The variables that are measured in the investigation are called dependent variables, these are influenced by the values ​​of the independent and intervening variables

* There is a third type of variable called intervening that affect the results but cannot be identified or controlled by the researchers.

Based on this definition for this case the independent variable must be temperature, even though the researcher cannot control it directly, he can measure its value.

The dependent variable is the intensity or maximum strength and the number of hurricanes that can be measured by the researcher and create a relationship between the intensity as a function of the gulf water temperature.

To learn more about the dependent and independent variables see: brainly.com/question/14501374

Answer:

Difference between MeV and meV?

1 MV = 1000000 volts. 1 MeV stands for million electron volts. It is a unit of energy. 1 MeV = 1.60217653 x 10 13

Explanation:

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#A

[tex]\boxed{\sf 1kg=1000g}[/tex]

[tex]\\ \sf\longmapsto 4000[/tex]

[tex]\\ \sf\longmapsto \dfrac{4000}{1000}[/tex]

[tex]\\ \sf\longmapsto 4kg[/tex]

#B

[tex]\boxed{\sf 1km=1000m}[/tex]

[tex]\\ \sf\longmapsto 2.4km=2.4(1000)[/tex]

[tex]\\ \sf\longmapsto 2400m[/tex]

The lithosphere is the solid layer of Earth, the hydrosphere is the water-based part, and the atmosphere is the air, they work together to shape the biosphere.

The lithosphere is the soil part that composes the Earth's planet (i.e., the soil), the hydrosphere refers to oceans and all water bodies, while the atmosphere is the layer of air. These three layers interact with biotic factors to shape the biosphere.

In conclusion, the lithosphere is the solid layer of Earth, the hydrosphere is the water-based part, and the atmosphere is the air, they work together to shape the biosphere.

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Please find attached photograph for your answer. Please do comment whether it is useful or not.

The idea that "students ' immune systems have declined due to the use of hand sanitizers " is a hypothesis.

The term hypothesis refers to an intelligent guess or idea often based which is subject to scientific investigation via experiments.

A hypothesis may be right or wrong. We can only prove a hypothesis by subjecting it to a series of rigorous experiments.

Thus Collette's idea is a hypothesis.

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Answer:

1. Astronomical telescope.

2. Terrestrial telescope.

3. Galilean telescope.

Explanation:

[tex].[/tex]

Answer:

c. Should uncontrolled nuclear reactions be used for military applications?

Explanation:

The question on wether to use technology for military applications, is not a science question but a moral dilemma

The question that can not be answered by science is the question; "Should uncontrolled nuclear reactions be used for military applications?".

Science is empirical in its approach. This implies that the questions that are answered by science are questions that are testable and can be be verified in a laboratory.

Science does not answer questions that deal with the opinions of various individuals. That is completely outside the purview of scientific investigation.

Hence, science does not answer the question; Should uncontrolled nuclear reactions be used for military applications?

This question deals with moral values and the opinions of people about a matter and not empiricism.

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Answer:

Explanation:

Answer:

At 20 °C (68 °F), the speed of sound in air is about 343 metres per second (1,235 km/h; 1,125 ft/s; 767 mph; 667 kn), or a kilometre in 2.9 s or a mile in 4.7 s.

Answer:

3.70 gallons

Explanation:

Answer:

Speeding up While Falling Down

Gravity is a force that pulls objects down toward the ground. When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion.

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Explanation:

Answer:

A light emitting diode (a semiconductor diode which glows when voltage is applied.

Total displacement of the car = (0+150) Km = 150 Km

Total time taken = 2 hours

Average velocity = 150/2 Km/h = 75 Km/h

A car travels 150 km in the north direction and it takes 2 hours to cover the distance then the velocity of the car will be 75 km/hr.

Velocity is the rate at which a moving object's direction changes as perceived from a certain vantage point and measured by a particular unit of time. Kinematics, the area of special relativity that investigates how bodies move, starts with the fundamental idea of speed.

In order to be explained, the scientific vector quantity known as velocity needs to have both a magnitude and a direction.

As per the provided information in the question,

The total displacement, D = 150 km north.

Total time is taken by the car, t = 2 hours.

Then, the velocity (v) of the car will be,

v = D/t

v = 150/2

v = 75 km/hr.

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Answer:

(A)  inertia increases.

Explanation:

Inertia is the property of mass that resists change so the mass an object has the greater the inertia

Answer:

Telescope,cameras

Hope it helped

Answer:

0.0035 mg

Explanation:

1 mcg = 1e-3 mg

》35 mcg = 35×10^-3 mg

= 0.0035 mg

Answer:

-8 m/s²

Explanation:

Initial velocity = 40 m/s

Final velocity = 0 m/s

Time (T1) = 5 s

Time (T2) = 10 s

Acceleration = v - u/t2 - t1

Acceleration = 0 - 40/10 - 5

Acceleration = -40/5

Acceleration = -8 m/s²

(A)

Explanation:

If the displacement is given by

[tex]D_x = -3t + 4t^2[/tex]

Then its velocity [tex]v_x[/tex] and acceleration [tex]a_x[/tex] are then

[tex]v_x = \dfrac{dD_x}{dt} = -3 + 8t[/tex]

[tex]a_x = \dfrac{dv_x}{dt} = 8[/tex]

Evaluated at t = 2, we see that [tex]v_x = 13[/tex] and [tex]a_x = 8[/tex] and both of them are positive. Therefore, the answer (a).

Answer:

QUESTION

If the displacement of an object is given in SI units by Dx = -3 t + 4 t 2, at t = 2 s its velocity and acceleration are, respectively:

[tex]==============================[/tex]

ANSWER

a) positive, positive

[tex]==============================[/tex]

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Answer:

C. Velocity of the ball

Explanation:

This is because as the acceleration of the ball increases, there will be an increase in the velocity rate and decrease in the time.

See the formula,

a=m/s²