2 years ago

The strength of an electromagnet CANNOT be increased by?

Physics

1 answer:

zmey [24]2 years ago

4 0

Answer:

reversing the current

Explanation:

You might be interested in

A player hits a ball with a force of 150 N by the bat. How much force does the ball exerts on the bat?

Reptile [31]

Answer:

The force on the ball is the same

3 0

2 years ago

A sphere of mass of 1.55 kg is accelerated upwards by a string to which the sphere is attached. Its speed increases from 2.81 m/

Mama L [17]

Answer:

The tension in the string is 16.24 N

Explanation:

Given;

mass of the sphere, m = 1.55 kg

initial velocity of the sphere, u = 2.81 m/s

final velocity of the sphere, v = 4.60 m/s

duration of change in the velocity, Δt = 2.64 s

The tension of the string is calculated as follows;

$T = ma + mg\\\\T = m(a + g)\\\\where;\\\\a \ is \ upward \ acceleration \ of \ the \ sphere\\\\g \ is \ acceleration \ due \ to \ gravity =9.8 \ m/s^2\\\\a = \frac{\Delta V}{\Delta t} = \frac{v- u}{ t} = \frac{4.6 - 2.81 }{2.64} = 0.678 \ m/s^2$

T = 1.55(0.678 + 9.8)

T = 1.55(10.478)

T = 16.24 N

Therefore, the tension in the string is 16.24 N

5 0

2 years ago

On Jupiter a rover drops a ball down a 430 m high cliff and records a fall time of 24.5 sec. what is the gravitational accelerat

Dahasolnce [82]

17.6 meters/ second squared

5 0

3 years ago

Is pulling a dog a contact force or a non contact force

horrorfan [7]

A contact force since you are making physical contact with the dog

Mark my brainliest please

6 0

2 years ago

if a car engine does 600,000 J of work over a 500m distance and the mass of the car is 250Kg then what is the final velocity of

drek231 [11]

Given that

Work = 600,000 J ,

distance(S) = 500 m ,

mass (m) = 250 Kg ,

Determine the velocity of car (v) = ?

We know that,

Work = Force × distance

=> Force = Work ÷ distance

= 600,000 ÷ 500

= 500 N .

Also Force F = m.a ; from Newtons II law

500 = 250 × a

a = 2 m/s.

<em>Final Velocity from the given formula </em>

V² = u² + 2.a.s

= 0 + 2 × 2 × 500

= \sqrt{2000}

8 0

2 years ago