Name the type of current a. used in houseold supply b. given by a cell

Answers

Answer 1

Answer: Household, at the outlet . . . Alternating current, 117v RMS, 60 Hz. / / / Flashlight cell . . . Direct current, nominal 1.5v .

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The main purpose of a particle accelerator is to

Answers

Answer;

Speed up small particles

Explanation;

A particle accelerator is a machine that accelerates the sub-atomic particles such as electrons or protons to high energies. The particle accelerators produce beams of charged particles which may used for different research purposes.
The accelerators propel charged particles to speed near the speed of light and colliding them using electromagnetic fields, which allows scientist to use them in research.

An unbalanced force of 40. newtons keeps a5.0-kilogram object traveling in a circle of radius
2.0 meters. What is the speed of the object?
(1) 8.0 m/s (3) 16 m/s
(2) 2.0 m/s (4) 4.0 m/s

Answers

This can be answered using the formula of centripetal force. In the given problem, the centripetal force (40 N), mass (5 kg), radius (2 m) are all named, except for the speed. The formula is shown below:

F = mv^2 / r

Substituting the given values:

40 N = 5kg(v^2) / 2
80 = 5 * v^2
v^2 = 16
v = 4

Therefore, the correct answer is 4.0 m/s (4).

Which of the following would you describe as a change in state?A) melting ice
B) burning paper
C) film being exposed to light
D) a piece of paper being cut in half

Answers

Melting ice is a change in state. (A)

A. Melting ice, because it is changing water from its solid state (ice) to its liquid state.

In power plants, generators convert mechanical energy into chemical energy.

Answers

The statement “In power plants, generators convert mechanical energy into chemical energy” is false. It should be that the generator will convert chemical energy from the raw material such as fuel oil that it receives into mechanical energy to generate energy.

Answer:

A 10.-kilogram object, starting from rest, slides down a frictionless incline with a constant acceleration of 2.0 m/sec2 for four seconds. What is the approximate weight of the object? A) 1 N B) 10 N C) 100 N D) 1,000 N

Answers

C) 100N

Given:

Mass of the object = 10kg

Acceleration due to gravity = 9.81m/s²

Weight is a measure of the force of gravity pulling down on an object. It depends on the object's mass and the acceleration due to gravity, which is 9.8 m/s² on Earth.

Formula for calculating the Weight of an object is expressed as;

Weight = mass × acceleration due to gravity

On substituting the values in the above formula:

Weight = 10×9.81

Weight = 98.1N

Hence, the approximate weight of the object is 100N.

Therefore, the correct option is option C.

Learn more:

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Answer:

C) 100N

Explanation: