PHYSICS HIGH SCHOOL

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Answers

Answer 1

Answer:

Given:

Mass of the Beaker = 12.023 g

Total Mass of the Beaker and the Ball = 23.050 g

To Find:

The Mass of the Ball.

Solution:

Total Mass of the Beaker and the Ball - Mass of the Beaker = Mass of the Ball

23.050 g - 12.023 g = 11.027 g

Answer:

The Mass of the Ball is 11.027 g

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A ball is thrown upwards and it goes to the height 100 m and comes down 1) What is the net displacement?

Answers

Answer:

o m

Explanation:

The net displacement is 0 because it returns to its original position. The final position and initial position are the same, so displacement is 0.

The copper wire and bulb is connected in a series with 220 V electric supply. Why only an electric bulb glows where as the copper wire remains the same.Give REASON to support the answer.

Answers

-- In a series circuit, the current ( I ) is the same at every point.

-- The power dissipated by any section of the circuit is I² x Resistance.

-- The wire has very low resistance, so I²R is very low dissipated power.

-- The filament in the bulb has most all of the resistance in the circuit,
so it dissipates virtually all the power of the circuit, and certainly much
more than the wires do.

Compute the resistance in ohms of a lead block 15 cm long and 0.10 cm2 in cross-sectional area. (ρ = 2.2 x 10-5 ohm-cm)

Answers

Resistance of a wire is defined as the measure of how difficult an electric current will pass through a conductor. The longer the wire, the greater the resistance. Resistivity, on the other hand, is an intrinsic property depending on the material to which the current passes. The formula for resistance in terms of resistivity is:

R = pL/A

where:
R = resistance
p = resistivity
L = length
A = cross-sectional area

This gives a resistance of 3.3x10^-3 ohms

Answer: The resistance of a lead block is $330\Omega$

Explanation:

Resistance is defined as the difficulty of flowing of electric current through a substance. It is directly proportional to the length of the wire and inversely proportional to the area of cross section of the wire.

Mathematically,

$R\propto (l)/(A)$

Removing the proportionality sign, we get:

$R=\rho (l)/(A)$

Where,

$\rho$ = Resistivity of the wire = $2.2* 10^(-5)\Omega cm$

R = Resistance of the wire = ? ohm

l = Length of the wire = 15 cm

A = Area of cross-section of the wire = $15cm^2$

Putting the values in above equation, we get:

$R=(2.2* 10^(-5)\Omega cm* 15cm)/(0.10cm^2)$

$R=330\Omega$

Hence, the resistance of a lead block is $330\Omega$

_______ are atoms that carry an electric charge. A. Nonelectrolytes
B. Colloids
C. Electrolytes
D. Ions

Answers

ions is the answer i believe

i belive the correct answer is D

A blender uses 1,500 joules of energy in 5 seconds. What is the power rating of the blender?

Answers

the answer is 300 watts

Answer:

The power rating of the blender is 300 W.

Explanation:

To find the power of an object, you need to divided the work by the time. Thus, we would divide the work, 1,500, by the time, 5 seconds. This gives you the answer, 300 W.

Compare the outermost electrons of an atom with the inner most electrons of an atom in terms of energy

Answers

The innermost electron of an atom has the lowest level of energy while the outermost electron has the highest level of energy.
There are different energy levels in the atoms of elements, for an atom to go into an higher level it has to obtain more energy and to go to lower level it has to lose energy.

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A boy throws a football horizontally from a window that is 2.8 m above the ground. If he throws the ball with a speed of 12 m/s, how far from the window does the ball land? A. 11.2 m B. 0.23 m C. 9.1 m D. 4.3 m