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konstantin123 [22]
3 years ago
15

Which statement explains why the compass needle points in the direction it does?

Physics
1 answer:
Pavlova-9 [17]3 years ago
3 0

Answer:

A compass needle points north because the north pole of the magnet inside it is attracted to the south pole of Earth's built-in magnet. Now if the needle in your compass is pointing north, that means it's being attracted (pulled toward) something near Earth's north

Explanation:

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Which of the following is true when an object of mass m moving on a horizontal frictionless surface hits and sticks to an object
vivado [14]

Answer:

C. The initial momentum should be equal to the final momentum due to the conservation of momentum.

P_{initial} = mv_0\\P_{final} = (M+m)v_1\\v_1 = \frac{m}{M+m}v_0

Since m/(M+m) < 1, v_1 > v_0.

Explanation:

Wrong -> A. Since the smaller particle still moves after the collision, it has a kinetic energy.

Wrong -> B. The total initial momentum is equal to the momentum of the smaller particle. Therefore, the momentum of the objects that stuck together is equal to that of the smaller object.

Wrong -> D. Since the bigger object is initially at rest and the surface is frictionless, the direction of motion will be the same as the direction of the smaller particle.

4 0
3 years ago
1. Which of the following is NOT a vector quantity? (a) Displacement. (b) Energy. (c) Force. (d) Momentum. (e) Velocity.
dem82 [27]

Answer:

B. energy

Explanation:

A vector has direction.

Energy does not have a direction.

5 0
3 years ago
If a car is driving at 10 m/s and is driving for 2 minutes, what is the total distance it will
kondor19780726 [428]

Distance = (speed) x (time)

Distance = (10 meter/second) x (2 minutes)

Distance = (10 meter/second) x (2 minutes) x (60 second/minute)

Distance = (10 x 2 x 60) (meter-minute-second / second-minute)

<em>Distance = 1,200 meters</em>

4 0
3 years ago
The tires of a car support the weight of a stationary car. If one tire has a slow leak, the air pressure within the tire will __
mrs_skeptik [129]

Answer:

The answer is E. Decrease, increase, decrease

Explanation:

The pressure within the tire wall is a result of the molecules of air colliding with the walls of the tire, if there is a leakage that means some or all of the air molecules will escape resulting in a decrease in the collision between the molecules and the tire wall which means the pressure decreases within the walls which also translates to a decrease in pressure exerted by the tire on the ground surface.

Before the leakage, the tire walls are kept tensed due to the internal pressure exerted by the air molecules. When the leakage occurs the air molecules escape and this makes the tire loose its firm upright shape thereby falling to the floor and creating an increase in the area of contact between the tire and the floor surface.

The force exerted on the floor by the tire is proportional to the the pressure exerted and the surface area through which this force is applied, though the pressure is seen to decrease and the surface area seen to increase, one must consider the weight loss due to the air molecules that escapes which causes the force to decrease.

8 0
3 years ago
Heat transfer by condution
salantis [7]
Heat Transfer by conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass.  if this is not what are you looking for I am sorry :c
3 0
3 years ago
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