Other Physics Answers

A spring has a spring constant of 450 N/m. How much must this spring be stretched to

store 49 J of potential energy?

You are given the task of designing a solenoid that must produce a field in its interior that is 20 times larger than the Earth's field (Bearth = 5×10^-5). This solenoid is to be 10 cm long and 1.0 cm in diameter, with N = 500. What current must the wire be able to carry without falling?

Recognize the principle:

Sketch the Problem:

Identify the relationship/ Equation:

Solution:

What does it mean?:

A solenoid with length 30 cm, radius 1.2 cm, and 300 turns carries a current of 2.6 A. Find B on the axis of the solenoid (a) at the center, (b) inside the solenoid at a point 10 cm from one end, and (c) at one end.

What is powdered effervescent tablet in a cup of water?? What time the tablet was fully dissolved? And what is you're observation???

Tomas

Classify the following energy as renewable or renewable found in the box bellow

Biomass

Fossil fuel(coal,petroleum, natural gas)

Hydroelectric

Electrochemical (batteries)

Wind power

Solar power

Geothermal

Biogas

Non-renewable source Renewable source

Consider this thought experiment: Put a pan of water on a weighing scale and read the weight. Dip a piece of iron in the water taking care that the lower end does not touch the bottom. Will the reading increase or not? Why and by what principle?

A 100-N weight is suspended at the middle of a rope forming a letter “Y” with the angle between the ropes being 150°. Find the tensions in the rope.

A steel rod 2 cm in diameter is found to stretch 0.01 cm when subjected to a tensile force of 5000 N. What is its original length?

A 4-m uniform bar of 10-kg mass is inclined 30° with the horizontal. If it is supported vertically at its ends find the force of reaction at each support.

Two balls of 0.4 kg and 0.2 kg mass with a velocity of 2 m/s and 4 m/s, respectively, approach each other to execute a perfectly elastic collision. Find the velocity of eacha aftercollision.