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the table below shows the right ascensions of two stars at a location.

Name of star Right ascension
Star 1 2 hours
Star 2 4 hours 30 minutes
What is the interval between the times when the two stars rise at the location? (10 points)

Group of answer choices

2 hours

30 minutes

2 hours 30 minutes

4 hours 30 minutes

Answers

Answer 1

Answer:

Explanation:

It would actually be A. 30 , as each hour of ascension (i am not sure about the correct terminology) equals 15 .

Answer 2

Answer:

30

Explanation:


Related Questions

If the air has a thermal energy of 4.5 x 10 J , what is the air temperature ?

Answers

Answer:

This is easy. You subtract the final temperature from the starting temperature to find the difference. So if something starts at 50 degrees Celsius and finishes at 75 degrees C, then the change in temperature is 75 degrees C – 50 degrees C = 25 degrees C. For decreases in temperature, the result is negative.

One possible unit of speed is

Answers

Answer:

m per second is the answaegnzxn

People on here are soooo smart I wish I could be like that

Answers

Answer:

3600J

Explanation:

The amount of energy transferred in two minutes by the given heater is 3600J of energy.

This energy causes a transfer of kinetic energy to the copper. To solve this problem;

             60 seconds  =  1 minutes

            In two minutes, the number of seconds = 2 x 60  = 120seconds

So, on the table, at 120 seconds, 3600J of energy would have been transferred.

A computational model predicts the maximum height that a roller coaster car can reach when the lowest height of its journey is at ground level, where it has a speed of 20 m/s. Given these conditions, what is the maximum height?(1 point)

196 m

4.8 m

20.4 m

2.0 m

Answers

Answer: 20.4 m

Explanation: [tex]\frac{9.8^{2} }{Velocity} = Max Height[/tex]

The answers to this test are:

1.  What is the maximum speed when the conditions are mass = 450 kg, initial height = 30 m, and the roller coaster car is initially at rest?  

24.2 m/s

2. A computational model predicts the maximum height that a roller coaster car can reach when the lowest height of its journey is at ground level, where it has a speed of 20 m/s. Given these conditions, what is the maximum height?

20.4 m

3. A computational model predicts the speed of a roller coaster car at different heights given its speed at the lowest height of its journey, which is at ground level. The speed at the lowest point is 30 m/s. What is the prediction for its speed when it is at a height of 20 m?

22.5 m/s

4. A computational model predicts the maximum potential energy a roller coaster car can have given its mass and its speed at the lowest point of its journey. Its mass is 350 kg, and it speed at a height of 0 m is 25 m/s. What is the prediction for its maximum potential energy?

109,375 J

5. What is the benefit of using simple computational models in a spreadsheet application, like the one used in this course, to predict mechanical energy and related values?

It is easy to calculate new scenarios.

Ted William drops a ball from 14.5 meter to a desk that is 1.9 meters tall. What is the final speed of the ball right before it hits the desk.

Answers

Answer:

15.7m/s

Explanation:

To solve this problem, we use the right motion equation.

 Here, we have been given the height through which the ball drops;

 Height of drop = 14.5m - 1.9m  = 12.6m

The right motion equation is;

      V²  = U² + 2gh

V is the final velocity

U is the initial velocity  = 0

g is the acceleration due to gravity  = 9.8m/s²

h is the height

  Now insert the parameters and solve;

       V² = 0² + 2 x 9.8 x 12.6

      V²  = 246.96

       V = √246.96  = 15.7m/s

What is one way skin, muscle, and nerve cells similar?

Answers

Answer:

For starters the membrane voltage is the same in nerve cells as in muscle cells.

As for skin and muscle cells, both cells arise from the same type of embryonic layer, the ectoderm and both which produces energy, though skin cells eventually lose their organelles.

jupiter has a mass of 1,898,000,000,000,000,000,000,000,000 kg. How would this number be expressed in scientific notation?​

Answers

Answer:

Explanation:

How would this number be expressed in scientific notation? 1.898^27 kg. ...

20 POINTS
PLEASE HELP THIS IS DUE IN 5 MINUTES

please do not troll or put the wrong answer

Answers

Answer:

I believe the answer is B.

Explanation:

Newton's First Law of Gravity states, "The greater the weight (or mass) of an object, the more inertia it has. Heavy objects are harder to move than light ones because they have more inertia. "

The answer is D.

All objects travel at the same speed due to gravity.

I hope I helped! Sorry if my inference was incorrect.

can anyone plz give me a right answer now?

Answers

Answer:

Dy = - 0.0789 [m]

Explanation:

The vertical component of the vector can be determined with the sine of the angle.

Dy = 0.250*sin(18.4)

Dy = 0.0789 [m]

As the y-component is pointing downwards the component is negative.

Dy = - 0.0789 [m]

The heaviest loads ever raised were part of the offshore Ekofisk complex in the North Sea. The 4.0x 10 kg complex was raised 6.5 m by over a hundred hydraulic jacks. The work done on the complex during the raising was approximately 2.6x 101 J. Suppose the power output of all the jacks was 5.7x 10 W. How long did it take the jacks to raise the complex?​

Answers

Answer:

0.5s

Explanation:

Given parameters:

Mass of the complex  = 4 x 10kg

Distance moved  = 6.5m

Work done  = 2.6 x 10¹J

Power  = 5.7 x 10W

Unknown:

Time taken  = ?

Solution:

Power is the rate at which work is done.

  Power  = [tex]\frac{work done}{time}[/tex]

  work done  = power x time

        time  = [tex]\frac{work done }{power}[/tex]

  Insert the parameters;

       time  = [tex]\frac{260}{570}[/tex]   = 0.5s

Two drops of dilute sulphuric acid were added to 1 gm of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured solution got separated (step II). Step I and step II are:

Answers

Answer:

Both are physical changes

Explanation:

The dissolution of 1 gram of copper sulphate powder in a small amount of hot water in the presence of dilute H2SO4 is a physical change because no new substance was really formed in the process. This implies that step 1 is a physical change.

In step II, the hot liquid is allowed to cool leaving behind a beautiful blue coloured solution. This also is a physical change.

Hence both step I and step II are physical changes.

A 6.2 kg bowling ball that weighs 60.76 N is accelerating at 1.8 m/s2. After 2
seconds, it reaches a speed of 3.6 m/s. What is its momentum at this point?
A. 11.2 kg-m/s
B. 1.7 kg.m/s
C. 22.3 kg-m/s
D. 16.9 kg.m/s

Answers

The momentum of the bowling ball at the point where it reaches a speed of 3.6 m/s is 22.3 Kg.m/s (Option C)

How do i determine the momentum?

Momentum is defined as the product of mass and velocity. It is represented mathematically as:

Momentum = mass × velocity

Now, we can obtain the momentum of the bowling ball at the point where it reaches a speed of 3.6 m/s. Details below:

Mass of bowling ball = 6.2 KgVelocity of bowling ball = 3.6 m/sMomentum =?

Momentum = mass × velocity

Momentum =  6.2 × 3.6

Momentum = 22.3 Kg.m/s

Thus, the momentum at the point is 22.3 Kg.m/s (Option C)

Learn more about momentum:

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It takes some work for you to lift an object 20cm. How much work must you do to lift the same object 40cm?

Answers

Answer:

Twice the work needed to lift the 20cm object

Explanation:

Work done is derived using the expression below;

  Work done  = Force x distance

For this problem, we are lifting through a vertical height;

  Work done  = mg x h

 mg is the weight of the body;

Since both bodies have the same weigh;

   W1 is the workdone to lift 20cm

   W2 is the workdone to lift 40cm

   For the first lift;

         W1  = (mg) x 20cm

         (mg)  = [tex]\frac{W1}{20}[/tex]  

   For the second lift;

          W2  = (mg)  x 40cm

   Since they both have the same weight

          (mg)  = [tex]\frac{W2}{40}[/tex]  

Equating the two weights;

      [tex]\frac{W1}{20}[/tex]   =  [tex]\frac{W2}{40}[/tex]  

     20W2  = 40W1

          W2  = [tex]\frac{40W1}{20}[/tex]   = 2W1

What is the relationship between PE and KE in a system?

Answers

Answer: The connection between the two is that potential energy transforms into kinetic energy.

Explanation:

Mary Jo went on riding her horse through the trails. Her pace was 8 km/hr. She left at 8:30 am and got back to the barn at 9:00 am. How far did she go?
Question 4 options:

16 m/s

4 m/s

4 km

16 km

Answers

Answer:

4km

Explanation:

Distance=speed x time

Knowing this we know the time and speed

so it is 8 x .5= D

And 8 x .5 =4

If you have any questions let me know

A car drove 10m east and then turned around and drove back 5m west. What is the total distance traveled and the displacement

Answers

Answer:

15m

Explanation:

Why does a heat pump need an external source
of energy (such as electrical energy) ?

Answers

Answer:

The reason is because a heat pump uses external power to accomplish the work of transferring energy from the heat source to the heat sink. Heat pumps are significantly more energy efficient than simple electrical resistance heaters. The efficiency begins to decrease as the temperature difference between the heat source and sink increases.

friction always opposes ___________ motion​

Answers

ANSWER: Friction is a force that opposes motion. When two objects are in contact, friction is acts in a direction opposite to the motion of the object.


EXPLANATION: HOPE THIS HELPS.

According to Newton’s 2nd law of motion: objects at a rest will remain in rest unless acted upon

Answers

Answer:

True

Explanation:

It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion. Any change in motion involves an acceleration, and then Newton's Second Law applies.

- Hyperphysics

Answer:

true

Explanation:

because that's the answer

What are the vector scalar pairs?

Answers

Answer:

Explanation:

is there more to the problem?

a physics instructor conducts a projectile motion demonstration. The device used will drop one steel ball and horizontally launch another. If no air resistance is presented which steel ball, the one launced or the one dropped, striked the ground first?

(a) The launched ball

(b) The dropped ball

(c) both hit a the same time

(d) neither hit the ground​

Answers

Answer:

Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. The object is called a projectile, and its path is called its trajectory. The motion of falling objects, as covered in Problem-Solving Basics for One-Dimensional Kinematics, is a simple one-dimensional type of projectile motion in which there is no horizontal movement. In this section, we consider two-dimensional projectile motion, such as that of a football or other object for which air resistance is negligible.

Explanation:

B the dropped ball

A man drives his car 5 km east of his starting point then he travels 10 km south and reaches a point. From here he travels 15 km towards west and reaches another point .Finally he travels 20 km towards north. Find the net displacement of the man from where he started

Answers

Answer:

hjkjjjrjebdbnnd heudhdb

A 10 kg box is 1.3 m above the ground. How much potential energy does it have? (g on Earth of 9.8 m/s?
answer =
GPE = mgh
KE = .5mv2
I really need help

Answers

Potential energy = mgh
Potential energy = 10 x 9.8 x 1.3
Potential energy = 127.4 J

You lift a 2.0 kg book from a shelf that is 1 m from the floor. What is the potential energy with respect to floor?

Answers

Potential energy = mgh
Potential energy = 2 x 9.8 x 1
Potential energy 19.6 J

3) A 15.0kg cannonball is ascending after being launched. Neglect drag.

a)How many forces are acting on the cannonball?
b)What is the magnitude of the net force on the cannonball?
c)What is the magnitude of the cannonball's acceleration
dDescribe the cannonball's speed at this time:

Answers

Answer:

c

Explanation:

A runner is training and runs past meter mark 65 and starts a stopwatch. After the runner passes meter mark 15 the stopwatch stops at 8 seconds.



What was the runners velocity?
Question options:
-6.25 m/s
6.25 m/s
8.13 m/s
-1.88 m/s

Answers

Answer:

6.25 m/s

Explanation:

Given parameters

Initial mark = 65

Final mark  = 15

time taken = 8s

Unknown:

Velocity of the runner  = ?

Solution:

Velocity is the displacement divided by time;

        Velocity  = [tex]\frac{displacement}{time}[/tex]  

Displacement  = Initial mark - final mark  = 65 - 15 = 50m

Now, insert the parameters and solve;

       Velocity  = [tex]\frac{50}{8}[/tex]   = 6.25m/s

Gizmo do you know how to do it​

Answers

Answer:

?? what

Explanation:

A soccer ball is rolling across a soccer field. The system consists of the
ball. The force of gravity pulls down on the ball as it rolls. Is the work positive or negative?

Answers

Answer:

NEGATIVE

Explanation:

Compounds are made of more than one type of element bound together in fixed ratios.


True or false?

Answers

Answer:

True

Explanation:

There are two major pure substances in Chemistry namely: elements and compounds. Elements are substances made up of only one type of atom which cannot be broken down. For example, H2 symbolizing hydrogen gas is an element.

On the other hand, atoms of different elements can combine together and be held by chemical bonds to form substances called COMPOUNDS. Hence, a compound is pure substance made of more than one type of element bound together in fixed ratios. For example, Al2O3 is a compound comprising of elements Al (aluminum) and O (oxygen) in a fixed ratio of 2:3.

The picture below shows Earth:

A. rotating
B. revolving
C. orbiting
D. stopping

Answers

Rotating around its axis I think the pic is small

The figure shows about the rotating earth.

To find the correct option among all the options, we need to know about the rotation state of earth.

What is rotation of earth?

Motion of earth about its own axis is known about its rotation motion.

How does rotation motion different from orbital or revolving motion?

In revolving and orbital motion, an object moves around an axis out side of that bulk of object in a certain orbit, while in rotational motion, the object moves around its own axis.

How is rotation motion represented?

Rotation motion is represented by drawing an axis in the bulk of object and to indicate the rotation a circular arrow is drawn.

Thus, we can conclude that the figure shows about the rotating earth.

Learn more about rotation motion here:

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