PHYSICS HIGH SCHOOL

What is true of an object pulled inward in an electric field?a) The object has a neutral charge.

b) The object has a charge opposite that of the field.

c) The object has a negative charge.

d) The object has a charge the same as that of the field.

Answers

Answer 1

Answer:

Answer:

option b

Explanation:

There is an object pulled inward in an electric field.

We have to find out of the four options given which is true.

a) The object has a neutral charge is false since when electric field pulls the object inward, there is a charge inside.

b) The object has a charge opposite that of the field, this option is correct since there will be an equal and opposite charge created by the object

c) The object has a negative charge will be correct only if the original charge was positive hence wrong

d) The object has a charge the same as that of the field is incorrect since this would be opposite the charge

So only option b is right

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If a police car drives at a constant speed of 30 km/h, how long will it take to travel a distance of 96 km??

Answers

Answer:

3.2 hours

Explanation:

96÷30=3.2

so it should take 3.2 hours

When Ava first opened her beverage, there were lots of bubbles. However, as her drink got warmer, she noticed that there were fewer bubbles in it. In general, as the temperature increases, the solubility of solids _______ while the solubility of gases _______. 1) increases, decreases 2) increases, increases 3) decreases, decreases 4) decreases, increases

Answers

In general, as the temperature increases, the solubility of solids increases, while the solubility of gases decreases. Therefore, the correct answer is 1) increases, decreases.

Final answer:

Generally, as temperature rises, solid solubility increases while gas solubility decreases. This is why when a carbonated drink gets warm, it has less bubbles.

Explanation:

Generally, as the temperature increases, the solubility of solids typically increases, while the solubility of gases usually decreases. Thus, for Ava's case with the beverage, as the drink got warmer (indicating an increase in temperature), the bubbles, which are gaseous, decreased. A real-life example of this is a carbonated drink. When you open a cold soda, it starts out very bubbly.

However, if you let it sit and warm up, the gas (carbon dioxide) becomes less soluble in the liquid and leaves the solution, resulting in fewer bubbles.

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which unit of measure would scientist use to measure the thickness of rock layer, created as a result of volcanic activity

Answers

A scientist would use a unit of length appropriate for the magnitude of what he or she is measuring. In this case, since rock is built up very slowly, they would probably use millimetres or centimetres. In some cases they may use meters.

There you go.

How would one be able to travel in time?

Answers

The most important thing that one would need to have is a clear, vivid, active, convincing imagination. In reality, time travel is not possible.

One uniform sphere of matter has a radius of 0.50 m and a mass of 65 kg. A second uniform sphere has a radius of 0.80 m and a mass of 87 kg. The surfaces of the spheres are 1.20 m apart, as measured on a line drawn between the centers of the spheres. What is the magnitude of the gravitational force that each sphere exerts on the other?

Answers

Answer:

$6.04\cdot 10^(-8)N$

Explanation:

The magnitude of the gravitational force between the two spheres is given by:

$F=G(m_1 m_2)/(r^2)$

where

G is the gravitational constant

m1 , m2 are the masses of the two spheres

r is the distance between the centres of the two spheres

Here we have:

m1 = 65 kg is the mass of the first sphere

m2 = 87 kg is the mass of the second sphere

the distance between the centres of the two spheres is equal to the sum of the radius of each sphere and the distance between the surfaces:

r = 0.50 m + 0.80 m + 1.20 m = 2.50 m

Substituting the numbers into the formula, we find:

$F=(6.67\cdot 10^(-11) )((65 kg)(87 kg))/((2.50 m)^2)=6.04\cdot 10^(-8)N$

Final answer:

To calculate the gravitational force between the two spheres, we use Newton's law of gravitation. Substituting the given values into the formula will give us the magnitude of the gravitational force.

Explanation:

To calculate the magnitude of the gravitational force between two spheres, we can use Newton's law of gravitation, which states that the force is equal to the gravitational constant (G) multiplied by the product of the masses of the spheres and divided by the square of the distance between their centers. In this case, the gravitational force exerted by the first sphere on the second sphere can be calculated as:

F = (G * m1 * m2) / r^2

Substituting the given values, we get:

F = (6.67 × 10-11 N·m2/kg2)(65 kg)(87 kg) / (1.2 m)2

Calculating this expression will give us the magnitude of the gravitational force. The force exerted by the second sphere on the first sphere will have the same magnitude.

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Radio waves travel at the speed of light, which is 3.00 u 108 m/s. How many kilometers will radio messages travel in exactly one year?

Answers

Answer:

Distance traveled will be $9.462* 10^(12)km$

Explanation:

We have given speed of the light $v=3* 10^8m/sec$

We have to find the distance traveled by light in 1 year

We know that 1 year = 8760 hour

And 1 hour = 60×60 = 3600 sec

So 1 year $=8760* 3600=3.154* 10^(7)sec$

We know that distance = speed × time

So distance traveled by light in one year $=3.154* 10^7* 3* 10^8=9.462* 10^(15)m$

We have to fond the distance in km

As we know that 1 km = 1000 m

So $9.462* 10^(15)m=(9.462* 10^(15))/(1000)=9.462* 10^(12)km$

Final answer:

Radio messages will travel approximately 9.46 x 10^12 kilometers in exactly one year.

Explanation:

Radio waves travel at the speed of light which is approximately 3.00 x 108 m/s.

To find out how many kilometers radio messages will travel in exactly one year, we need to first convert the speed of light into kilometers per second.

Since there are 1000 meters in a kilometer, we divide the speed of light by 1000 to convert from meters to kilometers. Then, we multiply this value by the number of seconds in a year (365 days x 24 hours x 60 minutes x 60 seconds) to get the total distance traveled in kilometers.

In summary, radio messages will travel approximately 9.46 x 1012 kilometers in exactly one year.

Learn more about Speed of light here:

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