The concept that must be used to solve this problem is linked to Newton's laws of gravitation. Newton defined the gravitational attraction force as the product between the universal constant of gravitation, by the masses of each object, all this because of the change in the squared distance that separates them, mathematically it can be expressed as,
[tex]F_G = \frac{G m_1 m_2}{r^2}[/tex]
Here,
G = Gravitational Universal Constant
[tex]m_{1,2}[/tex] = Mass of each object
r = Radius
Our values are,
[tex]G = 6.67*10^{-11}N\cdot m^2/kg^2[/tex]
[tex]m_1 = 300kg[/tex]
[tex]m_2 = 140kg[/tex]
[tex]r = 1.7m[/tex]
Replacing,
[tex]F_G = \frac{(6.67*10^{-11}N\cdot m^2/kg^2 )(300kg)(140kg )}{(1.7m)^2}[/tex]
[tex]F_G = 9.7*10^{-7} N[/tex]
An iron nail does not pick up paper clips as a magnet would.
Answer:
Because even if iron is magnetic its not a magnet it self unless rubbed a magnetic object
What is the region around a magnet where the magnetic force is exerted?
A.
magnetic poles
B.
tesla
C.
charge field
D.
magnetic field
Answer:
Magnetic field
Explanation:
Answer:
magnetic field
Explanation:
The persistence of vision for normal eye is
Answer:
The answer is 1/16
Explanation:
1. Persistence of vision refers to the optical illusion that occurs when visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye. 2. The persistence of vision for normal eye is 1/16 if a second.
Physics question about density
So the right answer is 4kg/m^3.
Look at the attached picture
Hope it will help you
Good luck on your assignment
Answer:
The answer is option 4.
Explanation:
Firstly, you have to convert the mass of tea bagto kilogram as the question wants the unit in kg/m³.
[tex]1000g = 1kg[/tex]
[tex]100g = 1kg \div 10[/tex]
[tex]100g = 0.1kg[/tex]
So the mass of tea bag is 0.1 kg. Next you have to use density formula ρ = mass/volume. Then you have to substitute the values into the formula :
[tex]ρ = \frac{mass}{volume} [/tex]
Let mass = 0.1kg,
Let volume = 0.025m³,
[tex]ρ = \frac{0.1}{0.025} [/tex]
[tex]ρ = 4kg \: per \: {m}^{3} [/tex]
How does friction affect velocity
Answer:
It slows it down.
Explanation:
Higher the velocity, higher the friction. Friction is the force OPPOSITE to whatever the force is going.
If a circuit has no components in it will the voltage be high or low
Answer: its low
Explanation:
The ratio of the potential difference across a conductor to the current in the conductor is called
A) conductivity
B) resistance
C) charge
D) power
Answer:
The ratio of the potential difference across a metallic conductor to the current in the conductor is known as.
B. Resistance.
Explanation:
According to ohms law " the current passing through a conductor is directly proportional to the potential difference between the ends provided the temperature of the wire remains constant".
What is resistance ?
Resistance is a measure of the opposition to current flow in an electrical circuit
what is a resistor ?
a resistor is a n electric conductor which forms resistance to free flow of electric current, the resistance is measured in Ω
The ratio of the potential difference across the conductor to the current is called resistance
What is Resistance?It is defined as the ratio of the potential difference across the conductor to the current. The resistance is measured in Ω.
[tex]R = \dfrac VI[/tex]
Where,
[tex]R[/tex] - resistance
[tex]V[/tex]- voltage (Potential difference)
[tex]I[/tex] - current
Therefore, the ratio of the potential difference across the conductor to the current is called resistance.
To know more about resistance.
https://brainly.com/question/4289257
please help its in science CER, 30 points
Answer:We have seasons because the earth is tilted (wonky) as it makes its yearly journey around the sun. The Earth's axis is tilted at an angle of 23.5 degrees. This means that the Earth is always "pointing" to one side as it goes around the Sun.
Explanation:
got this from the internet
Which is the correct scientific notation of the number 0.000681?
Answer:
6.81 x 10^-4
Explanation:
Which statement is NOT true about voltage?
A higher voltage means a faster current.
All electricity sources have the same voltage.
Voltage is the difference in electrical potential energy.
The unit for voltage is volt (v).
The first two choices are both false, but the second one is the falser one.
All electricity sources do not have the same voltage. The outlet in your bedroom wall supplies 120 volts, but the USB port on your laptop only supplies 5 volts, and the battery in your cellphone only supplies 3.7 volts.
All electricity sources have the same voltage isn't true
All electricity sources usually have different voltage as the number of
electrons needed to power them varies. For example heating appliances
usually have a higher amount of voltage as it requires more electrons to
increase the temperature.
The higher the amount of voltage , the higher the amount of electrons which collides more and translates to faster current which is correct.
Voltage is also known as the difference in electrical potential energy and the unit for voltage is Volt (V).
Read more on https://brainly.com/question/16589216
Two trains run in the same direction. The one behind has double the length of the one ahead. The initial distance of separation = 200 m. The speeds are(a) train in front = 36 km/h(b) train behind = 108 km/h. If it took 40 seconds for the longer train to overtake the shorter one , find the length of the shorter train.
Answer:
The shorter train has a length of 600m
Explanation:
The equation of motion of the first train can be written as:
[tex]x'=v't[/tex] (1)
v' = 108km/h = 30m/s
Furthermore, you can write the equation of motion of the second train as:
[tex]x=(200+l)+vt[/tex] = xo + vt (2)
v = 36km/h = 10m/s
where you have taken the initial position as measured from the front of the first train to the front of the second one. l is the length of the second train and 200 the separation of it respect to the first train.
For t = 40 both trains have the same position, that is, x=x'. Then, you equal equations (1) and (2), replace t=40, and solve the equation for l:
[tex]x'=x\\\\v't=200+l+vt\\\\(30m/s)(40s)=200+l+(10m/s)(40s)\\\\l=600m[/tex]
Hence, the first train has a length of 600 m
The train behind, or the second train, has twice the length of the first train:
[tex]l'=2l=2(600m)=1200m[/tex]
The shorter train has a length of 600m
Which energy sources input can cause the turbine (wooden wheel)tobspin and generate electrical energy?
Answer:
The energy source which can cause the turbine (wooden wheel) to spin and generate electrical energy is hydro-energy source.
Explanation:
The energy source which can cause the turbine (wooden wheel) to spin and generate electrical energy is hydro-energy source. Hydro energy source, is the energy source gotten from the force of falling water.
Hydro energy causes the turbine to spin converting it mechanical energy and finally to electrical energy using a generator.
Force of falling water (hydro-energy source) ------>spinning of turbine (mechanical energy) ---------------> electrical energy
What is the gravitational force between Saturn and it’s moon
Answer:
The gravitational force between Saturn and it's moon is 1.62 m/s ^2
Explanation:
google it
Answer:
Explanation:
C bro
name and describe the process that fuels the sun
Answer:
The Sun derives all its energy from a fusion cycle. In that process, tiny hydrogen molecules combine into a continuous proton-proton chain to create larger helium nuclei. The above figure illustrates the fusion of hydrogen into helium.
Explanation:
Hope this helps.
Answer:
nuclear fusion
Explanation:
In this process, small hydrogen molecules fuse together to form bigger helium nuclei in a continuous proton-proton chain.
What is the current through a 11v bulb with a power of 99w
Answer:
9.01amp
Explanation:
Power = V^2/R
Given that v = 11volts, P = 99watts
99 = 11^2/R
11×11 = 99R
121= 99R
R = 121/99
R= 1.22ohms
From ohms Law; V = IR
11volts = I × 1.22ohms
I = 11/1.23
I = 9.01 amp
A hollow cylindrical (inner radius = 1.0 mm, outer radius = 3.0 mm) conductor carries a current of 80 A parallel to its axis. This current is uniformly distributed over a cross section of the conductor. Determine the magnitude of the magnetic field at a point that is 2.0 mm from the axis of the conductor.
Answer:
The magnetic field is [tex]B = 3 mT[/tex]
Explanation:
From the question we are told that
The inner radius is [tex]r_i = 1.00 mm =1*10^{-3} \ m[/tex]
The outer radius is [tex]r_2 = 3.00 \ mm = 3.0 *10^{-3} \ m[/tex]
The distance from the axis of the conductor is [tex]d =2.0 \ mm = 2.0 *10^{-3} \ m[/tex]
The current carried by the conductor is [tex]I = 80 A[/tex]
According to Ampere's circuital law , the magnetic field at a point that is [tex]r_3[/tex] from the axis of the conductor
[tex]B = \frac{\mu_oI}{2 \pi d } [\frac{d - r_1}{r_2 -r_1} ][/tex]
Where [tex]\mu_o[/tex] is the permeability of free space with a value of [tex]\mu_o = 4 \pi *10^{-7} N/A^2[/tex]
substituting values
[tex]B = \frac{(4 \pi *10^{-7})(80)}{2 * 3.142 * 2 *10^{=3} } [\frac{(2^2 - 1 ^2 )*10^{-3}}{(3^2 - 1^2) *10^{-3}} ][/tex]
[tex]B = 3 mT[/tex]
A car of 900 kg mass is moving at the velocity of 60 km/hr. It is brought into rest at 50 meter distance by applying a brake. Now, calculate the force required to stop the car.
Answer: [tex]-2502N[/tex]
Explanation:
[tex](V_2)^2=(V_1)^2+2ad[/tex]
where;
[tex]V_2[/tex] = final velocity = 0
[tex]V_1[/tex] = initial velocity = 60 km/h = 16.67 m/s
[tex]a[/tex] = acceleration
[tex]d[/tex] = distance
First all of, because acceleration is given in m/s and not km/h, you need to convert 60km/h to m/s. Our conversion factors here are 1km = 1000m and 1h = 3600s
[tex]60km/h(\frac{1000m}{1km} )(\frac{1h}{3600s} )=16.67m/s[/tex]
Solve for a;
[tex](V_2)^2=(V_1)^2+2ad[/tex]
Begin by subtracting [tex](V_1)^2[/tex]
[tex](V_2)^2-(V_1)^2=2ad[/tex]
Divide by 2d
[tex]\frac{(V_2)^2-(V_1)^2}{2d} =a[/tex]
Now plug in your values:
[tex]a=\frac{(0)^2-(16.67 m/s)^2}{2(50m)}[/tex]
[tex]a=\frac{0-277.89m^2/s^2}{100m}[/tex]
[tex]a=-2.78m/s[/tex]
If you're wondering why I calculated acceleration first is because in order to find force, we need 2 things: mass and acceleration.
[tex]F=ma[/tex]
m = mass = 900kg
a = acceleration = -2.78m/s
[tex]F=(900kg)(-2.78m/s)\\F=-2502N[/tex]
It's negative because the force has to be applied in the opposite direction that the car is moving.
Which of the following would accurately label the X axis?
Answer: Distance
I’m not sure if it is correct, but I am pretty sure it is......
I hope this helps :)
Where does the charge of a circuit go when it reaches a capacitor?
Answer:
Explanation:
When the charge of a circuit reaches the capacitor, all charge is distributed in the surface of the capacitor in order to create an electric field. The opposite of this charge is also in the capacitor, but separated.
When the capacitor receive more charges, its stability changes. Thus, the charge in one of the plates of the capacitor demands that charge on the other plate move out of the capacitor to equilibrate the charge. Thus, the current in the circuit is not interrupted.
Answer:
It gets stored somewhere in the capacitor
Explanation:
I got it right
4. In a long distance race, the athletes were expected to take four rounds of the track such that the line of finish was same as the line of start. Suppose the length of the track was 200m. What is the total distance to be covered by the athletes? What is the displacement of the athletics when they touch the finish line?
Answer:
The total distance to be covered by the athletes is 800 m
The displacement of the athletes when they touch the finish line is zero.
Explanation:
Given;
Length of the track, L = 200m
the Length of the track for a single round = 200 m
(a) Distance is a scalar quantity which has only magnitude;
If the athletes were expected to take four rounds of the track, then the total distance = 4 x 200 m = 800 m
(b) Also, if the line of finish was same as the line of start, then displacement of the athletes when they touch the finish line is zero (0 meters). This is because displacement has both magnitude and direction. Once the athlete returns to his starting point, his displacement at that point is zero.
What class lever is a
1.Pencil Sharpener
2.Tennis racket
3. Hole puncher
4. Can opener
should be 1
Explanation:
because what do you use in class and has a lever
What adjustments to an electromagnet that causes the electromagnet to lose a strength
Explanation:
1) reduction in current
2)less no. of coils per unit length
3) removal of soft iron core
To complete a project, 200,000 Joules of work is needed. The time taken to complete the project is 20 seconds. How much power is needed?
Answer:
10,000
Explanation:
200,000/20 = power needed
200,000/20 = 10,000
Hope this Helps!
Answer:
10,000 Watts
Explanation:
Power is the ratio of work to time, or work over time. It can be found using the following formula.
p=w/t
where p is the power, w is the work, and t is the time.
The project needed 200,000 Joules, and it took 20 seconds to complete the project. Therefore, w=200,000 and t=20. Substitute these values into the formula.
p=200,000/20
Divide
p=10,000
Add appropriate units. The units for power is Watts.
p=10,000 Watts
10,000 Watts of power is needed.
A ladder is at rest with Oct upper end against a wall and its lower end on the ground.A worker is about to climb it.When is it more likly to slip
Answer: When the worker is on the top rung
Explanation: When the ladder was initially resting on the wall, the torque from the normal reaction on ladder from the horizontal surface is equal to the torque from the vertical surface on ladder.
The weight of the worker produces a torque which is in the direction of the torque from the normal reaction on ladder, produced by the vertical surface. Therefore for the ladder to stay in rotational equilibrium, the torque on ladder from the normal reaction produced by the horizontal surface must increase.
This increase is possible when the worker is on the lower rung, but as the worker goes high, the magnitude of normal reaction from the vertical surface would increase, thereby increasing the risk of slipping of ladder.
What is the magnitude of the magnetic field created 4.0m away from a 10.0 A current?
Answer:
The magnitude of the magnetic field created is 5 x 10⁻⁷ T
Explanation:
Given;
magnitude of current, I = 10.0 A
distance of the magnetic field, r = 4.0m
Apply Biot-Savart Law to determine the magnitude of of the magnetic field created;
[tex]B = \frac{\mu_oI}{2 \pi r}[/tex]
where;
B is the magnitude of of the magnetic field
μ₀ is constant
I is current
r is the distance of the field
[tex]B = \frac{4 \pi*10^{-7} *10}{2 \pi*4} = 5*10^{-7} \ T[/tex]
Therefore, the magnitude of the magnetic field created is 5 x 10⁻⁷ T
Force = 65 kg x 3 m/s =
What is the answer?
What units do you use for your end result?
Answer:
multiply 65kg and 3m/s^2
to get 195kgm/s
or 195N
wait is that 3m/s or 3m/s^2?
What’s the resistance in the circuit
Answer:
I = 0.75 A
Explanation:
The question is not to calculate the resistance, but to calculate the current. (The resistance is already given by the value of 2 Ohm).
U = I * R
I = U / R
with U = 1.5 V and R = 2 Ohm
I = 1.5 / 2
I = 0.75 A
When the Net Force quadrupled from 50N to 200N, how many times bigger was the acceleration?
Answer:
acc. also gets increased four times
Se golpea una pelota de golf de manera que su velocidad inicial forma un ángulo de 45° con la horizontal. La pelota alcanza el suelo a 180 metros del punto en que se lanzó. Calcula su velocidad inicial y el tiempo que ha Estado en el aire
Answer:
42m/s
6.06s
Explanation:
To find the initial velocity and time in which the ball is fling over the ground you use the following formulas:
[tex]x_{max}=\frac{v_o^2sin(2\theta)}{g}\\\\x_{max}=vt_{max}[/tex]
θ: angle = 45°
vo: initial velocity
g: gravitational constant = 9.8m/s^2
x_max: max distance = 180 m
t_max: max time
by replacing the values of the parameters and do vo the subject of the first formula you obtain:
[tex]v_o=\sqrt{\frac{gx_{max}}{sin(2\theta)}}\\\\v_o=\sqrt{\frac{(9.8m/s^2)(180m)}{sin(2(45\°))}}=42\frac{m}{s}[/tex]
with this value of vo you calculate the max time:
[tex]t_{max}=\frac{x_{max}}{v}=\frac{x_{max}}{v_ocos(45\°)}\\\\t_{max}=\frac{180m}{(42m/s)cos(45\°)}=6.06s[/tex]
hence, the initial velocity of the ball is 42m/s and the time in which the ball is in the air is 6.06s
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TRANSLATION:
Para encontrar la velocidad inicial y el tiempo en el que la pelota está volando sobre el suelo, use las siguientes fórmulas:
θ: ángulo = 45 °
vo: velocidad inicial
g: constante gravitacional = 9.8m / s ^ 2
x_max: distancia máxima = 180 m
t_max: tiempo máximo
reemplazando los valores de los parámetros y haciendo el tema de la primera fórmula que obtiene:
con este valor de vo usted calcula el tiempo máximo:
por lo tanto, la velocidad inicial de la pelota es de 42 m / sy el tiempo en que la pelota está en el aire es de 6.06 s
What is the answer to this question?
Answer:
C
Explanation:
The temperature of an object does not change when it is going through a phase change, since there is a single specific point on the temperature gradient where that change occurs. Once the phase change has occurred, the water's temperature can continue to change in that direction, but during the phase change it does not. Hope this helps!
Answer: The answer is C
Explanation:
Hope it helps :)