The scattering of a stream of positively charged particles when striking a thin film of gold confirms thatthe positive charge in an atom must be located in a dense central mass.atoms contain electrons in varying energy layers around the nucleus.
electrons are found in the center of an atom.
electrons can only be found within predicted areas surrounding the nucleus.
Answers
Answer: The correct statement is the positive charge in an atom must be located in a dense central mass.
Explanation:
Rutherford gave an experiment called as gold foil experiment.
In his experiment, he took a gold foil and bombarded it with alpha particles which carry positive charge of +2 units. He at first thought that the particles will pass straight through the foil, but to his surprise, many of them passed through, some of them deflected their path and a few of them bounced back straight from their path.
From this observations, he concluded that in an atom, there exist a small positive charge that is present at the center. Because of this positive charge, the alpha particles deflected their path and some of them bounced straight back their path.
Thus, the correct statement is the positive charge in an atom must be located in a dense central mass.
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an input force of 50 Newtons is applied through a distance of 10 meters to machine with mechanical advantage of 3. If the work output for the machine is 450 newton x meters and this work is applied through a distnace of 3 meters, what is the output force of the machine
needhelpp101 Why is the gravitational potential energy of an object 1 meter above the moon’s surface less than its potential energy 1 meter above Earth’s surface? A. The object’s mass is less on the moon. B. The object’s weight is more on the moon. C. The object’s acceleration due to gravity is less on the moon. D. both a and c
Carbon and hydrogen are examples of pure substances or
Gazala makes the device shown in the diagram and uses it to pick up four paper clips on the point of the nail.What change would enable Gazala to pick up eight paper clips?A) reversing the batteryB) reversing the nail and using the nail’s headC) wrapping the wire around the nail more timesD) unwrapping several loops of the wire from the nail
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The behavior of spacecraft engaged in battle is another aspect of the films is troubling the scientists. According to them, when hit in space by a blaster, the crafts should continue moving in the same direction as the impact rather than falling downwards as the effects of gravity would not apply while in orbit.
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Answer:
1. Solid- rock, shoe
2. Liquid- water, dish soap
3. Gas- oxygen, carbon dioxide
4. Plasma- lightning, stars
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Speed is defined as rate of change in position or we can say it is ratio of total distance moved in total interval of times
While in order to find the velocity we know that it is ratio of total displacement and total time
so here main difference is that speed is scalar quantity and we do not require any direction in speed while in velocity we require direction as well as magnitude
Here we need to select a case where speed is constant while velocity is not constant.
It is only possible when direction is continuously changing but magnitude remains the same
so here correct answer will be
C) driving around in a circle at exactly 100 km/hr
Final answer:
Constant speed but not constant velocity is representational of circular motion, where speed is steady but the direction of movement continuously changes - such as driving around a circle at 100 km/hr.
Explanation:
The example in which you are traveling at a constant speed but not at constant velocity is C) driving around in a circle at exactly 100 km/hr. Velocity incorporates both speed and direction. Despite maintaining a constant speed, the constant change in direction (which is characteristic of circular motion) means the velocity is not constant.
To illustrate further, imagine a car moving around a circular track at a steady speed of 100 km/hr. Despite the speed remaining constant, the car is continuously changing direction. Therefore, its velocity, a vector quantity taking into account both magnitude (speed) and direction, is constantly changing.
In contrast, if we consider other examples such as driving straight forward or backward at a specific speed, the direction remains constant, therefore maintaining a constant velocity unless the speed changes.
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If all the components of a vector is equal to 1, then that vector is not a unit vector but .
Answer: False
Explanation:
Unit Vector
A vector which defines the direction of a physical quantity is known as a Unit Vector. For a vector, the unit vector is the vector/ mod of the value. Since the mod of a unit vector is always 1, the value is simply represented as its vector form.
If we take all the components of a vector quantity as 1, then its mod will be,
i.e.
which is not a unit vector.
Hence, the given statement is false.
Final answer:
All components of a vector being equal to 1 does not necessarily define a unit vector. A unit vector is defined by having a magnitude, or length, of 1. Unless it's a 1-D vector with its single component as 1, a vector with all components as 1 won't be a unit vector.
Explanation:
In mathematics, particularly vector algebra, a unit vector is a vector of length 1. The condition you've mentioned – all components of a vector being equal to 1 – does not generally define a unit vector. When the components of a vector are all 1s (in a 2D or 3D space, for instance), the resultant vector is not a unit vector. This is because the magnitude or length of a vector is calculated by the square root of the sum of the squares of its components.
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a. True
b. False
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A neuron transfers information to another neuron (synapses) in the form of electrical impulse. Due to this issue, the activity brain can be mesured.