1. Two charged objects repel each other whentheir charges are of different signs
they have the same number of protons
their charges are of the same signs
they have the same number of electrons
2. Batteries typically have
two positive terminals
two negative terminals one positive and one negative terminal
no terminals

Answers

Answer 1

Answer:

1. when their charges are of the same signs

Explanation:

Electrostatic force is the force exerted betwen objects that have charge. The magnitude of the force is given by:

$F=k(q_1 q_2)/(r^2)$

where k is the Coulomb constant, q1 and q2 are the charges of the two objects, and r is the separation between the two objects. The sign (and therefore the direction) of the force depends on the relative signs of the two charges. In fact:

- When the two charges have same sign, the force is positive, which means that it is a repulsive force

- When the two charges have opposite sign, the force is negative, which means that it is an attractive force

So, we can conclude that

Two charged objects repel each other when their charges are of the same signs

2. Two terminals, one positive and negative

Explanation:

Batteries are devices which provides (usually through some chemical reactions) a potential difference, also called electromotive force. When connected to a closed circuit, this potential difference provided by the battery "pushes" electrons through the circuit, generating an electric current.

Batteries have generally two terminals: one terminal at positive voltage, called positive terminal, and one terminal at negative voltage, called negative terminal. When connected to the circuit, electrons are pushed from the negative terminal through the circuit towards the positive terminal of the battery.

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compare the distance time graph for a fast-moving object with the distance time graph of a slower moving object

Answers

The slope of the distance/time graph is the speed of the moving object.
So the graph for a fast moving object will have a greater slope than the
graph for a slower moving object has.

With his Square Deal, Theodore Roosevelt hoped toa. help pull the United States out of the Great Depression.
b. increase the influence and power of the United States among the nations of the world.
c. keep the wealthy and powerful from taking advantage of small business owners and the poor.
d. help business trusts remain competitive.

Answers

3/C seems right.4/D is off for the subject.1/A FDR was the Roosevelt during the Depression, not Teddy.2/B is wrong because Teddy was focused on the US

An indicator of average kinetic energy is _____. pressure volume diffusion temperature

Answers

An indicator of average kinetic energy is temperature. Temperature is directly proportional to Kinetic energy of the molecules of an element.

Answer:

Temperature

Explanation:

The energy contained by a body due its motion is known as kinetic energy.From kinetic theory of gases, the average kinetic energy is proportional to temperature. More the temperature, more would be the speed of the particles. Gases having same temperature would have same average kinetic energy.

Thus, an indicator of average kinetic energy is temperature.

A shot-putter throws an 8.00 kg shot at a speed of 10.0 m/s. What is the kinetic energy of the shot?

Answers

Answer:

Kinetic energy of the shot is 400 Joules

Explanation:

It is given that,

Mass of the shot, m = 8 kg

Speed of thrown, v = 10 m/s

We have to find the kinetic energy of the shot. It is given by the product of mass of an object and the square of velocity divided by 2 i.e.

$KE=(1)/(2)mv^2$

$KE=(1)/(2)* 8\ kg* (10\ m/s)^2$

KE = 400 Joules

Hence, the kinetic energy of the shot is 400 joules.

Ekin=1/2*m*v^2 so 1/2*8*(10m/s)^2 = 400Nm Or J

A 600-N box is pushed up a ramp that is 2 meters high and 5 meters long. The person exerts a force of 300-N. What is the efficiency of the ramp?

Answers

From information given, there are two forces in action, the vertical and the horizontal. We first need to calculate separately work done by these two forces, then determine the efficiency.Work = Force × distancework(a) → 600N × 2m = 1,200 Nmwork(b) → 300N × 5m = 1,500 NmEfficiency = work(a) / work (b) × 100Efficiency = 1200 / 1500 × 100Efficiency = 0.8 × 100Efficiency = 80%Therefore the efficiency of the ramp is 80%

Is it ok for some help pwease?What is the area of calm winds near the equator called?

doldrums

polar easterlies

trade winds

horse latitudes

Answers

Answer:

doldrums

Explanation:

Just need to type something more to be able to post

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