The magnitude of the electric field due to the proton in a hydrogen atom at a distance of 5.29 x 10-11 m, the expected position of the electron in the atom will be a) 1012 N/C
What is electric field due to a charge ?Electric field is defined as the electric force per unit charge. The direction of the field is taken to be the direction of the force it would exert on a positive test charge.
electric field = k * q / r^2
given
distance (r) = 5.29 x 10-11 m
q of proton = + 1.602 * 10 ^ -19 C
k = 9 * 10 ^9 Nm^2 / C^2
Electric field = (9 * 10 ^9 Nm^2 / C^2 * 1.602 * 10 ^ -19 C )/ (5.29 x 10-11 m)^2
= 14.418 * 10 ^ (-10) / 27.98 * 10 ^ (-22)
= 0.5153 * 10 ^12 N/C
correct option a) 1012 N/C
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The speed of sound through air is approximately 343 m/s. What is the speed in miles per hour
Answer:
At 20 °C (68 °F), the speed of sound in air is about 343 metres per second (1,235 km/h; 1,125 ft/s; 767 mph; 667 kn), or a kilometre in 2.9 s or a mile in 4.7 s.
PLEASE MARK ME BRAINLIEST.Example of optical object
Answer:
Telescope,cameras
Hope it helped
A truck travels 40 m while slowing down from 15 m/s to 10 m/s. How long does it take to do this?
Answer:
4s
Explanation:
A projectile is launched with an initial speed of 15.5 m/s at an angle of 78 degrees above the horizontal,
What are the x and y components of the initial velocity?
Answer:
Explanation:
The formula for the x-components of the velocity vector is
[tex]V_x=Vcos\theta[/tex] and for the y-components it is
[tex]V_y=Vsin\theta[/tex] where V in both of those formulas is the magnitude of the velocity.
For the x-component, taking into consideration significant digits:
[tex]V_x=15.5cos(78)\\V_x=3.2\frac{m}{s}[/tex]
For the y-component, taking into consideration significant digits:
[tex]V_y=15.5sin(78)\\V_y=15\frac{m}{s}[/tex]
Grive reasons The units of force and pressure are called derived units. an
How ??
Force:-
We know
According to newtons second law
[tex]\boxed{\sf Force=Mass\times Acceleration}[/tex]
[tex]\\ \sf\longmapsto Force=kgm/s^2[/tex]
We don't use it
[tex]\\ \sf\longmapsto Force=Newton(N)[/tex]
Hence its a derived unit.
Pressure:-
[tex]\\ \sf\longmapsto Pressure=\dfrac{Force}{Area}[/tex]
[tex]\\ \sf\longmapsto Pressure=\dfrac{N}{m^2}[/tex]
[tex]\\ \sf\longmapsto Pressure=Pascal(Pa)[/tex]
Hence its a derived unit
if an object is accelerating at 4 m/s^2 and has a mass of 8 kg, what is the net
force (in newtons, N) on the object?
Answer:
The force applied is 32 N
Explanation:
F = ma
F = 8 × 4
F = 32 N
Answer:
[tex]\boxed {\boxed {\sf 32 \ Newtons}}[/tex]
Explanation:
We are asked to find the net force on an object. According to Newton's Second Law of Motion, force is the product of mass and acceleration. Therefore, the formula for calculating force is:
[tex]F= m \times a[/tex]
The mass of the object is 8 kilograms and its acceleration is 4 meters per second squared.
m= 8 kg a= 4 m/s²Substitute these values into the formula.
[tex]F= 8 \ kg \times 4 \ m/s^2[/tex]
Multiply.
[tex]F= 32 \ kg *m/s^2[/tex]
Convert the units. 1 kilogram meter per second squared is equal to 1 Newton. So, our answer of 32 kilogram meters per second squared is equal to 32 Newtons.
[tex]F= 32 \ N[/tex]
The net force on the object is 32 Newtons.
Which of the following measurement
tools would you need to determine the
weight of an iPad?
A. graduated cylinder
B. double pan balance
C. scale
D. triple beam balance
Answer:
It would be C.scale, because
A. is for liquid
B. is for measuring 2 things
and D. is for i don't know(lol)
but i think the scale would be the easiest way to measer an iPad
List three forms of energy and how used
1.020 please help!!
Mark brainliest
Answer:
0.0035 mg
Explanation:
1 mcg = 1e-3 mg
》35 mcg = 35×10^-3 mg
= 0.0035 mg
1.7 A7V battery delivers a 0.6 A current to an electric motor connected across its terminals . a) What power is delivered to the motor? b) If the motor runs for 6 minutes, how much electric energy is delivered to the motor?
Answer:
P=4.2V E=1512J
Explanation:
P=?
P=VI
Putting the values
P=2*0.6
P=4.2VE=?
E=P*t
E=4.2*6*60
E=1512JYo someone help me on dis jawnt rq plzzz!
Answer:
the answer is 45.6 kg = 45600 g
State the two laws of electromagnetic induction, and state them.
Báo cáo thực hành
Bài 1: Sóng trên dây: https://phet.colorado.edu/vi/simulation/wave-on-a-string
Bài 2: Cầu cân bằng: https://phet.colorado.edu/sims/html/circuit-construction-kit-dc-virtual-lab/latest/circuit-construction-kit-dc-virtual-lab_vi.html
Answer:
which language is this
Explanation:
5. A police car siren emits a frequency of 3900 Hz while driving down the road at a speed of 27.4. What frequency will a person
driving a car at 20.7 m in the opposite direction behind the police car hear?
fobs =
Hz
Answer:
f = 3900(343 - 20.7) / (343 + 27.4) = 3,394 Hz
Write three or four sentences to describe the process by which the sound of a book dropped on a desk reaches your ear. (3 points)
The working principle of a washing machine is
A) reverse osmosis
B) diffusion
C) centrifugation
D) dialysis
Explanation:
The working principle of a washing machine is centrifugation .
Answer:
The correct option is C) centrifugation
Explanation:
The washing machine consists of a centrifuge for this purpose. A centrifuge is a piece of equipment that puts an object in rotation around a fixed axis, applying a force perpendicular to the axis of spin that can be very strong.
The temperature at which water leaves the boiler is?
Answer:
The average setting for a gas-powered hot water boiler is 180°F. This provides the appropriate level needed for most cold weather temperatures. If you can raise the temperature manually, do not set it any higher than 210°F (which is often the limit), and try to remain down at 190°F if you need the extra heat.
Which of the following does not represent a question that can be answered by science?a. How much energy is released in a given nuclear chain reaction? b. Can a nuclear chain reaction be controlled? c. Should uncontrolled nuclear reactions be used for military applications?
d. What is the half-life of a waste product of a nuclear reaction?
Answer:
c. Should uncontrolled nuclear reactions be used for military applications?
Explanation:
The question on wether to use technology for military applications, is not a science question but a moral dilemma
The question that can not be answered by science is the question; "Should uncontrolled nuclear reactions be used for military applications?".
Science is empirical in its approach. This implies that the questions that are answered by science are questions that are testable and can be be verified in a laboratory.
Science does not answer questions that deal with the opinions of various individuals. That is completely outside the purview of scientific investigation.
Hence, science does not answer the question; Should uncontrolled nuclear reactions be used for military applications?
This question deals with moral values and the opinions of people about a matter and not empiricism.
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Which of the following is certain to change as a ball
accelerates?
A mass of the ball
B inertia of the ball
C velocity of the ball
Dforce acting on the ball occasionally
Answer:
C. Velocity of the ball
Explanation:
This is because as the acceleration of the ball increases, there will be an increase in the velocity rate and decrease in the time.
See the formula,
a=m/s²
A particle is projected from a point on a horizontal plane and has an initial velocity of 28root 3 m/s at an angle of 60 degree .find the greatest heights reached by the particle
Answer:
uujjjjjctc7tox7txr9ll8rz8lr5xl8r6l8dl85x8rl5x8rl5x8rl5xrx8l58rk5xr8l5xr6l8xr68lc
In the study of Physics, the "Universal Gas Law" is not considered a law at
all.true or false
Answer: It’s False hope this helps
Explanation:
The answer is False, the Universal Gas Law" is considered law in Physics.
The universal gas law is considered law in physics and it states that the product of the Pressure and Volume of a given mass of gas is equivalent to the product of the number of moles, Boltzmann constant, and the temperature.
It is also known as the Ideal gas equation and is expressed mathematically as:
PV = nRT where:
P is the pressure
V is the volume
n is the number of moles
R is the Boltzmann constant
T is the absolute temperature.
Hence from the above definition, we can see that Universal Gas Law" is also considered a law in physics. The answer is False
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What would make oppositely charged objects attract each other more?
o increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object
O decreasing the positive charge of the positively charged object and decreasing the negative charge of the negatively charged object
O increasing the distance between the positively charged object and the negatively charged object
O maintaining the distance between the positively charged object and the negatively charged object
Answer:
a: increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object
Explanation:
The oppositely charged objects attract each other more is option a. It increased the positive charge and the negative charge.
The Attraction of the oppositely charged:At the time when the oppositely charged objects are attracted to each other more so here the positive charge should be increased with respect to the positive charge object and the negative charge is increased with respect to the negative charge object
Hence, the first option is correct.
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5. A researcher is studying the intensity of hurricanes that entered the Gulf of Mexico between 1975-2015 and the average water temperature of the Gulf of Mexico at the hurricane's peak strength. What is the independent and dependent variable in this study?
Answer:
The independent variable is that entered by the researcher - it does not depend on anything else in the equation
The dependent variable is the result obtained by applying the equation to the independent variable
One variable is entered by the researcher giving rise to the second variable.
In the study given the intensity depends on the average water temperature.
The independent variable is the water temperature and the dependent variable is the maximum strength of the hurricane
In scientific research processes there are several types of variables
* Those that can be controlled or manipulated by researchers, these are called independient variable
* The variables that are measured in the investigation are called dependent variables, these are influenced by the values of the independent and intervening variables
* There is a third type of variable called intervening that affect the results but cannot be identified or controlled by the researchers.
Based on this definition for this case the independent variable must be temperature, even though the researcher cannot control it directly, he can measure its value.
The dependent variable is the intensity or maximum strength and the number of hurricanes that can be measured by the researcher and create a relationship between the intensity as a function of the gulf water temperature.
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If the displacement of an object is given in SI units by Dx = -3 t + 4 t 2, at t = 2 s its velocity and acceleration are, respectively:
a) positive, positive.
b) negative, positive.
c) negative, negative.
d) positive, negative.
(A)
Explanation:
If the displacement is given by
[tex]D_x = -3t + 4t^2[/tex]
Then its velocity [tex]v_x[/tex] and acceleration [tex]a_x[/tex] are then
[tex]v_x = \dfrac{dD_x}{dt} = -3 + 8t[/tex]
[tex]a_x = \dfrac{dv_x}{dt} = 8[/tex]
Evaluated at t = 2, we see that [tex]v_x = 13[/tex] and [tex]a_x = 8[/tex] and both of them are positive. Therefore, the answer (a).
Answer:
QUESTION
If the displacement of an object is given in SI units by Dx = -3 t + 4 t 2, at t = 2 s its velocity and acceleration are, respectively:
[tex]==============================[/tex]
ANSWER
a) positive, positive
[tex]==============================[/tex]
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1. After 2 hours, the displacement of a car is 150 km north. The initial displacement of the car is 0. What is the average velocity of the car
Total displacement of the car = (0+150) Km = 150 Km
Total time taken = 2 hours
Average velocity = 150/2 Km/h = 75 Km/h
A car travels 150 km in the north direction and it takes 2 hours to cover the distance then the velocity of the car will be 75 km/hr.
What is Velocity?Velocity is the rate at which a moving object's direction changes as perceived from a certain vantage point and measured by a particular unit of time. Kinematics, the area of special relativity that investigates how bodies move, starts with the fundamental idea of speed.
In order to be explained, the scientific vector quantity known as velocity needs to have both a magnitude and a direction.
As per the provided information in the question,
The total displacement, D = 150 km north.
Total time is taken by the car, t = 2 hours.
Then, the velocity (v) of the car will be,
v = D/t
v = 150/2
v = 75 km/hr.
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This graph shows that as an object's mass increases its
es )
A)
inertia increases.
B)
inertia decreases.
acceleration increases.
D)
acceleration decreases.
Answer:
(A) inertia increases.
Explanation:
Inertia is the property of mass that resists change so the mass an object has the greater the inertia
Explain how the lithosphere, hydrosphere, and atmosphere individually and collectively affect the biosphere. (2 points)
The lithosphere is the solid layer of Earth, the hydrosphere is the water-based part, and the atmosphere is the air, they work together to shape the biosphere.
What is the lithosphere?The lithosphere is the soil part that composes the Earth's planet (i.e., the soil), the hydrosphere refers to oceans and all water bodies, while the atmosphere is the layer of air. These three layers interact with biotic factors to shape the biosphere.
In conclusion, the lithosphere is the solid layer of Earth, the hydrosphere is the water-based part, and the atmosphere is the air, they work together to shape the biosphere.
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c. A car was running with a velocity of 20m/s. what will be its velocity after 30s if it's acceleration is 5m/s2
[tex] \large \mathfrak{Solution : }[/tex]
let's use first equation of motion to solve this ;
[tex] \boxed{ \boxed{ v = u + at}}[/tex][tex]v = 20 + (5 \times 30)[/tex][tex]v = 20 + 150[/tex][tex]v = 170 \: \: m/s[/tex]Velocity after 30 seconds = 170 m/s
Therefore, they
experience a
and produce
surface tension.
Answer:
Explanation:
Q:-What is speed????
Explanation:
In everyday use and in kinematics, the speed of an object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.
SI unit: m/s, m s−1
s=d/t
