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3 years ago

Describe one way that the force of gravity And a magnetic force or similar describe where they are different

1 answer:

8 0

Well, the Earth is a gigantic magnet and magnets in a compass always point north. Gravity pulls you down so you won't float everywhere. Hope this helps!

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Two cars collide inelastically and stick together after the collision. Before the collision, the magnitudes of their momenta are

dolphi86 [110]

Answer:

a) P1+P2

Explanation:

The magnitude of their combined momentum is just the addition of each momentum, because in this case of inelastic collision, the kinetic energy of the two cars are both converted to some form of energy because the velocity of both cars becomes zero, i.e., V=0, making P = mv = 0, this means the magnitude of P1 + P2 = 0.

3 0

3 years ago

PLEASE HELP!!! A.S.A.P.!!!!! WILL BE MARKED TO BE AS BRAINLEST!!! 30 POINTS!!!!!

Ray Of Light [21]

Answer: B)Number 1, 3 and 5 all demonstrate non-contact forces because the magnets or electrically charged objects exert forces on each other without touching.

Explanation:

Forces which act only when the two surfaces are in contact are known as contact forces. For example: frictional force is a contact force because it acts only when the two surfaces have tendency to move or are in relative motion.

Forces which act without any contact between surfaces are non-contact forces. For example: magnetic force, gravitational force, electrical force.

Because Kennedy and Lilly have to prove that some forces are non-contact forces, they must put up examples which actually show force being exerted between two objects without they being in contact. Thus, number 1, 3 and 5 demonstrate this.

7 0

3 years ago

Read 2 more answers

A proton moves from left to right across the screen at speed v0. Then a uniform magnetic field of strength 0.80 T is directed in

Anton [14]

Answer: The force is directed upward

Explanation: Considering the Lorentz force, given by:

F= qv×B

using the right hand rule and considering the direction of electron velocity and the magnetic field from the figure, the vectorial product gives a force vector upwards .

8 0

3 years ago

Conductors and Insulators

grin007 [14]

Answer:

<h2>Conductors</h2>

The substances which allow an electric current to pass through it is called conductors.

Example: Metals like copper,iron ,graphite etc.

<h2>Insulators</h2>

The substances which do not allow the electric current to pass through is called Insulators.

Example: Glass, dry wood ,plastic etc.

Hope this helps...

Good luck on your assignment...

4 0

3 years ago

The pressure in a compressed air storage tank is 1200 kPa. What is the tank's pressure in (a) kN and m units, (b) kg, m, and s u

Sever21 [200]

Answer:

a) 1200 kN/m²

b) 1,200,000 kg/ms²

c) 1.2 × 10⁹ kg/km.s²

Explanation:

Given:

Pressure = 1200 kPa

a) 1 Pa = 1 N/m²

thus,

1000 N = 1 kN

1200 kPa = 1200 kN/m²

b) 1 Pa = 1 N/m² = 1 kg/ms²

Thus,

1200 kPa = 1200000 Pa

1200000 Pa = 1200000 × 1 kg/ms²

= 1,200,000 kg/ms²

c) 1 km = 1000 m

1 m = 0.001 Km

thus,

1,200,000 kg/ms² = $\frac{1,200,000}{0.001}\frac{kg}{km.s^2}$

= 1.2 × 10⁹ kg/km.s²

3 0

3 years ago