A student has the following equipment - copper wire, nail made of iron,a battery, paperclips.How can he make an electromagnet and use it to separate a mixture of small pieces of copper and iron?

please help

Answers

Answer 1

Answer: The first step would be to create an electromagnet. You can create an electromagnet by winding a copper wire around the nail, the connect both ends to the battery. A current would start flowing around the nail through the wire, creating an electromagnet with its own magnetic field. Next, bringing the electromagnet to the mixture of copper and iron would slowly attract the pieces of iron (as copper is weakly magnetic). Do this slowly and the iron pieces would all slowly be separated from the copper pieces.

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Which term identifies the effects of the buildup of stationary electric charges on everyday objects caused by the transfer of electrons fromone object to another? A. stationary electricity B. current electricity C. magnetic electricity D. static electricity

Answers

D static Electicity....

Answer:Static Electricity

Explanation:

Jacob has a bucket of ice. He covers the bucket with a lid and sets it in the sun. The ice melts into liquid water. How does the mass of the ice compare with the mass of the water? A. The mass of the ice is the same as the mass of the water. B. The mass of the ice is more than the mass of the water. C. The mass of the ice is less than the mass of the water. D. There is no way to determine this from the information given.

Answers

Answer:

Explanation:

According to law of conservation of energy:

Mass (or energy) can neither be created nor destroyed but they can be changed into different forms.

As there is a lid on the bucket there is no evaporation happening, hence the mass will remain same.

Your shopping cart has a mass of 65 kilograms, In order to accelerate the shopping cart down an aisle at 0.3 m/sec2, what force would you need to use or apply to the cart?

Answers

remember Newton's second law: F=ma

to get the force in newtons, mass should be in kg and acceleration in m/s^2

conveniently, we don't need to convert units

we just need to multiply the two to get the force

65* 0.3 = 19.5 kg m/s^2 or N

if significant digit is an issue, the least number if sig figs is 1 so the answer would be 20 N

Final answer:

To accelerate a shopping cart with a mass of 65kg at a rate of 0.3 m/sec2, you would need to exert a force of 19.5 Newtons, according to Newton's second law of motion.

Explanation:

The subject of this problem is physics, specifically the concept of force, mass, and acceleration within the domain of Newton's second law of motion. The law states that the force needed to accelerate an object is equal to the mass of the object multiplied by the desired acceleration.

Given the mass of the cart is 65 kilograms and the acceleration is 0.3 m/sec2, you can calculate the required force using the formula:
Force = mass * acceleration.

So, Force = 65 kg * 0.3 m/sec2 = 19.5 Newtons. Therefore, you would have to exert a force of 19.5 Newtons to accelerate the shopping cart at the specified rate.

Learn more about Force calculation here:

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If the velocity of a body varied uniformly from 10 ms-1 to 25 ms-1 during a time interval of 5s what was the acceleration of the body?

Answers

Acceleration = velocity change / time
a = 25 - 10 / 5
a = 15/5
a = 3

In short, Your Answer would be 3 m/s2

Hope this helps!

Acceleration of the body =

.

Hope this cleared your doubt. Have a great day/night ahead!

(please show work)A rock is dropped off of a cliff. It falls to the ground in 10 seconds. Answer the following questions assuming that there is no air resistance.

c. What is the instantaneous velocity of the rock just before it hit the ground?

d.Find the rock's displacement for the 10 seconds.

Answers

c. -98 m/s

The motion of the rock is a uniformly accelerated motion (free fall) with constant acceleration $g=-9.8 m/s^2$ (negative since it is downward). Therefore, we can find its velocity using the following suvat equation