Which of these statements about resistance is true? Choose the best answer.A. The greater the resistance, the easier it is for electricity to flow
B. The greater the resistance, the less thermal energy is produce.
C. The greater the resistance, the more electrical energy is produced.
D. The greater the resistance, the more electrical energy is produced.

Answers

Answer 1

Answer:
'C' and 'D' are the same statement, and none of the 3 choices
is good.

Electrical energy is produced in a generator, a solar panel, or
a battery, not in things with resistance.

From the generator or battery, current flows through a circuit of
one or more components.

The greater the resistance of a component, the more energy is
LOST as the current flows through it. The component dissipates
the energy in the form of heat.

Answer 2

Answer:

This question is not worded in the best possible manner, nor is it specific enough. I also notice that C and D are duplicates.
The answer is B.

A is not true because regarding Ohm's law, $V = IR$ , where V=voltage, I=current, and R=resistance. If we hold Voltage as a constant, (which should be mentioned in the question if it was any good) than we can easily notice that $(V)/(R) = I$ , where I represents current. The larger $I$ is, the easier for electricity to flow. Clearly as resistance increases, current decreases, therefore A is not true.

B is true because of the same reason C (and D) is not true: the greater the resistance, the more power it creates. Again, holding Voltage, or V, as constant, the equation for finding the power (electrical power/energy) of a system is $(V^2)/(R) = P$ . We can notice here again that the greater R is, the less P is. The larger P is, the more energy is dissipated by the circuit. Therefore, since R is getting larger, P is getting smaller, and the amount of heat dissipated becomes less with R's increase.

C and D are not true because of what I explained in B, P gets smaller with R's increase.

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_______ is the idea that people should be more interested in advancing their lives on earth than in worrying about getting to heaven

Answers

The correct answer for the question that is presented is this one: "Theology." Theology is the idea that people should be more interested in advancing their lives on earth than in worrying about getting to heaven. Studying Theology requires a lot of faith from the learner.

In one hand you hold a .12-kg apple, in the other hand a .20-kg orange. The apple and orange are separated by .75 m. What is the magnitude of the force of gravity that
(a) the orange exerts on the apple?
(b) the apple exerts on the orange?

Answers

Final answer:

The orange exerts a gravitational force on the apple, which can be calculated using the formula for gravitational force. The apple exerts an equal and opposite gravitational force on the orange.

Explanation:

(a) The orange exerts a gravitational force on the apple. The magnitude of this force can be calculated using the formula for gravitational force: F = G * (m1 * m2) / r^2, where G is the gravitational constant (approximately 6.67430 x 10^-11 N*m^2/kg^2), m1 and m2 are the masses of the two objects, and r is the distance between their centers of mass. Plugging in the values, we have F = (6.67430 x 10^-11 N*m^2/kg^2) * (0.12 kg * 0.20 kg) / (0.75 m)^2. Solving this equation gives us the magnitude of the force of gravity between the orange and apple.

(b) The apple exerts an equal and opposite gravitational force on the orange, as described by Newton's third law of motion. This means that the magnitude of the force of gravity exerted by the apple on the orange is the same as the force of gravity exerted by the orange on the apple.

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Final answer:

The force of gravity between two objects can be calculated using Newton's universal law of gravitation. The force the orange exerts on the apple, and vice versa, is 2.138 x 10^-11 N. However, the apple's force on the orange is in the opposite direction.

Explanation:

The subject of this question is gravity, a fundamental force in physics. The force of gravity between two objects can be calculated using Newton's law of universal gravitation, which states that every point mass attracts every other point mass by a force pointing along the line intersecting both points. The equation is F = G * ((m1*m2)/r^2), where F is the force of gravity between the two objects, G is the gravitational constant (6.674 x 10^-11 N(m/kg)^2), m1 and m2 are the masses of the objects, and r is the distance between the centers of the two objects.

(a) Using this equation, we can find that the force the orange exerts on the apple is F = (6.674 x 10^-11) * ((0.20*0.12)/0.75^2) = 2.138 x 10^-11 N.

(b) According to Newton's third law of motion, every action has an equal and opposite reaction. Thus, the force the apple exerts on the orange is equal in magnitude and opposite in direction to the force the orange exerts on the apple, or -2.138 x 10^-11 N. The negative sign indicates that this force is in the opposite direction.

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5. You head downstream on a river in an outboard.The current is flowing at a rate of 1.50 m/s. After
30.0 min, you find that you have traveled 24.3 km.
How long will it take you to travel back upstream to
your original point of departure?

Answers

Answer:

hope this helps you're welcome

Final answer:

The time it will take to travel back upstream to your original point of departure is approximately 38.6 minutes, as determined by calculating the boat's speed against and with the river current.

Explanation:

This question involves understanding the concepts of velocity, time, and distance in physics. It relates to a situation where you are traveling downstream on a river with a certain current and later traveling back upstream against the current.

Firstly, we need to understand that the speed of the boat when it is moving downstream is its own speed plus the speed of the current. Given that you covered 24.3 km in 30 minutes (or 0.5 hours), we can calculate the boat's downstream speed as 24.3 km / 0.5 hours = 48.6 km/h.

The speed of the current is given as 1.50 m/s, which is approximately 5.4 km/h. So, the boat's own speed would be 48.6 km/h (downstream speed) - 5.4 km/h (current speed) = 43.2 km/h.

When heading back upstream, the boat's effective speed would be its own speed minus the speed of the current, which is 43.2 km/h - 5.4 km/h = 37.8 km/h. Now, to find out the time it would take to travel back upstream to the original point, we divide the total distance by the boat's effective speed, i.e., 24.3 km / 37.8 km/h = approximately 0.643 hours or around 38.6 minutes.