If a compasses moved close to a magnet, the compass will always point?towards the earths north pole
away from the earths south pole
along the magnets field lines
none of the above

Answers

Answer 1

Answer: The answer is C. Along the magnetic field lines

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How long would it take a sound wave from a car alarm to travel 1 km if the temperature is 0 degrees Celsius

Answers

The speed of sound in dry air at 0°C is 331.3 meters per second.

(1,000 meters) x (1 second / 331.3 meters) = 3.018 seconds .

What is the biggest planet in our galaxy

Answers

We won't be able to answer that until we've seen all of them and
we know that there aren't any more that we haven't seen yet.

There are estimated to be between 200 billion and 400 billion stars
in our galaxy, and a large part of the stars in the galaxy aren't visible
to us. So you can see that it's going to take some time before we're
able to answer your question. Check back with us next Tuesday.

Two cars collide at an intersection. Car A, with a mass of 1900 kg, is going from west to east, while car B, of mass 1500 kg, is going from north to south at 17.0 m\s. As a result of this collision, the two cars become enmeshed and move as one afterwards. In your role as an expert witness, you inspect the scene and determine that, after the collision, the enmeshed cars moved at an angle of 60.0degrees south of east from the point of impact.Part A WAS: How fast were the enmeshed cars moving just after the collision? I got 8.66 for velocity in part a which was CORRECT but i can't figure out PART B??...Part B:How fast was car A going just before the collision

Answers

Part A: The enmeshed cars were moving at a velocity of approximately 8.66 m/s just after the collision.

Part B: Car A was traveling at a velocity of approximately 8.55 m/s just before the collision.

How to compute the above velocities

To find the speed of car A just before the collision in Part B, you can use the principle of conservation of momentum.

The total momentum of the system before the collision should equal the total momentum after the collision. You already know the total momentum after the collision from Part A, and now you want to find the velocity of car A just before the collision.

Let's denote:

- v_A as the initial velocity of car A before the collision.

- v_B as the initial velocity of car B before the collision.

In Part A, you found that the enmeshed cars were moving at a velocity of 8.66 m/s at an angle of 60 degrees south of east. You can split this velocity into its eastward and southward components. The eastward component of this velocity is:

v_east = 8.66 m/s * cos(60 degrees)

Now, you can use the conservation of momentum to set up an equation:

Total initial momentum = Total final momentum

(mass_A * v_A) + (mass_B * v_B) = (mass_A + mass_B) * 8.66 m/s (the final velocity you found in Part A)

Plug in the known values:

(1900 kg * v_A) + (1500 kg * v_B) = (1900 kg + 1500 kg) * 8.66 m/s

Now, you can solve for v_A:

(1900 kg * v_A) + (1500 kg * v_B) = 3400 kg * 8.66 m/s

1900 kg * v_A = 3400 kg * 8.66 m/s - 1500 kg * v_B

v_A = (3400 kg * 8.66 m/s - 1500 kg * v_B) / 1900 kg

Now, plug in the values from Part A to find v_A:

v_A = (3400 kg * 8.66 m/s - 1500 kg * 8.66 m/s) / 1900 kg

v_A = (29244 kg*m/s - 12990 kg*m/s) / 1900 kg

v_A = 16254 kg*m/s / 1900 kg

v_A ≈ 8.55 m/s

So, car A was going at approximately 8.55 m/s just before the collision in Part B.

Learn more about velocity at:

brainly.com/question/25905661

#SPJ3

On a highway, a car is driven 80. kilometersduring the first 1.00 hour of travel,
50. kilometers during the next 0.50 hour, and
40. kilometers in the final 0.50 hour. What is the
car’s average speed for the entire trip?
(1) 45 km/h (3) 85 km/h
(2) 60. km/h (4) 170 km/h

Answers

The average speed of the car for the entire trip can be calculate by using:

$v=(S)/(t)$

where S is the total distance covered by the car, and t is the total time taken.

The total distance travelled by the car is:

$S=80 km+50 km+40 km=170 km$

while the total time taken is:

$t=1.00 h+0.50 h+0.50 h=2.00 h$

so, the average speed of the car is:

$v=(S)/(t)=(170 km)/(2.00 h)=85 km/h$

so, the correct answer is (3) 85 km/h.

The average speed of the car for entire trip is $\boxed{85\text{ km/h}}$ .

Further Explanation:

Speed is the measure of a quantity of an object the tells how fast the object is moving in the other words we can define the speed that it is the distance covered by an body divided by the time taken to cover that distance. It is a quantity with only magnitude so it is a scalar quantity.

The average speed is defined as the sum of all the distance traveled by the body divided by the sum of time taken to travel that distance.

Given:

The distance travel by the car is $80\text{ km}$ for $1.00\text{ hours}$ .

The distance travel by the car is $50\text{ km}$ for $0.50\text{ hours}$ .

The distance travel by the car is $40\text{ km}$ for .

$0.50\text{ hours}$ .

Concept:

The expression for the average can be written as:

S = $\frac{{{\text{sum of distances }}}}{{{\text{sum of time}}}}$ …… (1)

The distance travel by the car is $80\text{ km}$ for $1.00\text{ hours}$ , distance travel by the car is $50\text{ km}$ for $0.50\text{ hours}$ and distance travel by the car is $40\text{ km}$ for $0.50\text{ hours}$ .

The sum of the distance is:

$\begin{aligned}D&=80{\text{ km}}+{\text{50 km}}+40{\text{ km}}\n&=170{\text{ km}}\end{aligned}$

The sum of time taken to travel the distance is:

$\begin{aligned}t&=1.00{\text{ h}} + 0.50{\text{ h}} + 0.50{\text{ h}}\n&=2.00{\text{ h}}\end{aligned}$

Substitute $170\text{ km}$ for total distance and $2.00\text{ h}$ for total time in equation (1).

$\begin{aligned}S&=\frac{{{\text{170 km}}}}{{2.00{\text{ h}}}}\n&=85{\text{ km/h}}\end{aligned}$

Therefore, the average speed of the car for entire trip is $\boxed{85\text{ km/h}}$ .

Learn more:

1. Find the net force. https://brainly.in/question/8668644

2. Find the velocity. https://brainly.in/question/4502003

3. Calculate average speed brainly.com/question/11597590

Answer Details:

Grade: Middle school

Subject: Physics

Chapter: Kinematics

Keywords:

Highway, car, driven, 80 km, 1.00 hour, 1.00 hr, 1.00 h, 50 km, 0.50 hour, 0.50 hr, 0.50 h, 50 km, average speed, entire, trip, 85 km/hr.

What is the relationship between globular clusters and the milky way?

Answers

Globular clusters are nearly spherical groups of about 10,000 to 1 million stars. A typical galaxy may contain up to a few hundred globular clusters; our galaxy, the Milky Way, has somewhere between 125 and 200 globular clusters orbiting the galactic center.

-ScienceBuddies.com

When a squid pushes against the water, the squid moves forward because the ______________ pushes against the _______________.