Answer:
0.89kg
Explanation:
PE=mgh
PE=420 m=? g=9.8m/s^2 h=48
Making m the subject of formula
[tex]m = \frac{pe}{gh} [/tex]
[tex] = \frac{420}{9.8 \times 48} [/tex]
[tex] = \frac{420}{470.4} [/tex]
m=0.89kg
How does changing the distance influence the force between the two charges?
As the distance __________, the absolute value of the force ___________.
increases; increases
increases; decreases
increases; does not change
decreases; does not change
Explanation:
As the distance increases, the absolute value of the force decreases. Therefore, the correct answer is "increases; decreases". This is in accordance with Coulomb's Law, which states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. As the distance between the charges increases, the force between them decreases because the inverse square relationship causes the force to weaken rapidly with distance.
Carlos was playing on a slide on a sunny summer day. Which property of the slide tells Carlos how much energy the slide absorbed from the Sun?
O the mass
O the color
O the height
O the temperature
Answer:
Its D
Explanation:
just did It :)
If an object with a charge of 0.08 C experiences an electric force of 5.0 what is the electric field strength ?
Please show your work this is due today. Giving out brainliest.
Answer:
The electric field strength 62.5 N/C.
Explanation:
The electric force (F) on an object with charge q in an electric field with strength E can be calculated using the formula:
F = qE
Rearranging this formula, we can solve for the electric field strength:
E = F / q
In this case, the object has a charge of q = 0.08 C and experiences an electric force of F = 5.0 N. Substituting these values into the formula, we get:
E = 5.0 N / 0.08 C
E = 62.5 N/C
So, the electric field strength is 62.5 N/C.
A cannon ball is fired horizontally with a velocity of 50m/s from the top of a cliff 90m high.
a. After how many seconds will it strike the plain at the foot of the cliff?
b. At what distance from the foot of the cliff will it strike?
c. With what velocity will it strike the ground?
Answer:
a. time of flight = 4.285 s
b. horizontal distance reached = 214.25m
c. final velocity = 65.3m/s, at 40° downwards
Explanation:
This is a projectile motion question.
Things to note, in all projectile motion questions:
in the horizontal component, velocity is always constant. There is no horizontal acceleration. at maximum height reached by the object, vertical velocity = zerothe only vertical acceleration, is acceleration due to gravity = 9.8 m/s²vertical displacement, is initial height minus final height. ΔSIn projectile motion questions, we will use the three equations of motion:
[tex]v=u+at\\v^2=u^2+2as\\s=ut+\frac{1}{2}at^2[/tex]
Thus we can adjust our equations for the x - component:
[tex]v=u\\s=ut[/tex], since acceleration = 0
For the y - component:
[tex]v=u-gt\\v^2=u^2-2gs\\s=ut-\frac{1}{2}gt^2[/tex], since acceleration = gravity (9.8 m/s²), downwards.
Now, with our question, we can note: u(x) = 50m/s, and u(y) = 0, since, initially, only horizontal motion. Also, s(y) = - 90m.
(a) After how many seconds will it strike the plain at the foot of the cliff?
In this question, we are asked to find time of flight, 't'. As we have s(y), u(y), and g, we can use the third equation, [tex]s=ut-\frac{1}{2}gt^2[/tex] to find t.
Since u=0, thus, - 90 = -1/2×9.8×t². solving this algebraically, therefore, time of flight = 4.285 s.
(b) At what distance from the foot of the cliff will it strike?
Now, we need to find the horizontal distance or range. All we can use to do this is s = ut. Since we know that u=50m/s, and t=4.285s, this will be easy. s = (50)(4.285) = 214.25 m.
Therefore, horizontal distance reached = 214.25m.
(c) With what velocity will it strike the ground?
In this part, we need to find final velocity. Final velocity = the resultant vector of both the x and y velocity components. [tex]v=\sqrt{(v_x)^2+(v_y)^2}[/tex].
Since horizontal velocity is constant, u = v, and therefore, v(x) = 50m/s.
For vertical velocity, we can use [tex]v^2=u^2-2gs[/tex]. u(x) = 0, and s(y) = -90m.
Therefore, v² = -2(9.8)(-90). final vertical velocity is thus 42m/s.
Now final velocity = √(50² + 42²) ≈ 65.3 m/s.
Lastly, we need to remember to calculate direction, since velocity is a vector quantity. the direction of velocity (θ) [tex]=tan^{-1}(\frac{v_y}{v_x})[/tex]
Therefore, θ = 40°.
Therefore, final velocity = 65.3m/s, at 40° downwards.
8. Inferring When cars pass one another in
opposite directions on the highway, they tend
to be forced together. Use Bernoulli's principle
to explain why this happens.
someone help please
Bernoulli's principle can be used to explain the motion of cars on the highway as the cars moving fast create areas of low pressure around them, causing them to be pushed together by the higher pressure.
What is Bernoulli's principle?Bernoulli's principle can be formulated by Daniel Bernoulli. The principle states that as the speed of a moving fluid increases such as liquid or gas, the pressure within the fluid decreases through it. Although, Bernoulli deduced this law, it was Leonhard Euler who derived the Bernoulli's equation in its usual form in the year 1752.
When the two cars passes one another in opposite directions on the highway, then they tend to be forced together. Use the Bernoulli's principle to explain why this happens with the cars. The cars moving fast on the highway create areas of low pressure around them, causing them to be pushed together by the higher pressure.
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Naci ( table salt ) is an example of a (n)
Salt, or NaCl, is an example of an ionic compound. Ionic compounds are formed when a metal combines with a non-metal through the transfer of electrons.
What are crystalline compounds?Crystalline compounds are compounds that have a well-defined, ordered, and repeating three-dimensional arrangement of atoms, ions, or molecules in a solid state. In a crystalline compound, the constituent particles are arranged in a highly ordered and repeating pattern called a crystal lattice.
In the case of NaCl, the sodium (Na) donates an electron to the chlorine (Cl), forming an ionic bond between them and resulting in the formation of an ionic compound. Ionic compounds typically have high melting and boiling points, are crystalline in structure, and conduct electricity when dissolved in water.
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PLEASE HELP!! HURRYY
If a step down transformer has 220 V coming into the primary coil of 30 turns and 140 V is coming out of the second coil, how many turns in are in the secondary coil?
a.) 30
b.) 19
c.) 0.05
d.) 7
Answer:
We can use the formula for the transformer voltage ratio, which states that the ratio of the number of turns in the primary coil to the number of turns in the secondary coil is equal to the ratio of the output voltage to the input voltage:
Np/Ns = Vp/Vs
where Np is the number of turns in the primary coil, Ns is the number of turns in the secondary coil, Vp is the input voltage, and Vs is the output voltage.
We know that Vp = 220 V and Vs = 140 V, and we are trying to find Ns. We also know that Np = 30, since that is the number of turns in the primary coil. Substituting these values into the formula, we get:
30/Ns = 220/140
Simplifying the right side of the equation, we get:
30/Ns = 11/7
Cross-multiplying, we get:
11Ns = 210
Dividing both sides by 11, we get:
Ns = 19
Therefore, the answer is b.) 19.
Which of the following provided the best definition as to what is gravity? Group of answer choices What goes up must come down Everything with mass is attracted to everything else with mass Only small things are attracted to larger things Only larger things are attracted to smaller things
The statement that everything with mass is attracted to everything else with mass is the best definition of gravity.
What is gravity?In the field of physics, gravity is a basic interaction that causes all objects with mass or energy to attract one another. This force is present everywhere in the universe, and is the reason why all the planets in the solar system orbit around the sun.
From the group of answer choices, "Everything with mass is attracted to everything else with mass" is correct, since it describes the natural phenomenon by which all objects in the universe are attracted to one another.
The statement "What goes up must come down" is a simple observation of gravity's effects on objects on Earth, but it does not provide a complete definition of the force itself.
"Only small things are attracted to larger things" and "Only larger things are attracted to smaller things" are incorrect, as gravity acts on all objects with mass, regardless of their size.
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Identify What limits the speed at which the ball will leave the racket?
The maximum speed at which the racket can move is limited by the physical ability of the player.
What limits the speed at which the ball will leave the racket?The speed at which a ball leaves a racket is determined by several factors, including the speed of the racket at impact, the angle of the racket face, and the properties of the ball itself.
The maximum speed at which the racket can move is limited by the physical ability of the player. A player can only swing the racket so fast before they reach their physical limits. Additionally, the angle at which the racket strikes the ball affects the ball's speed. If the racket face is angled too steeply or too shallowly, it can decrease the speed of the ball.
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A gas of volume 1 l at 10 degree Celsius is heated in such a way that both its volume and pressure become double calculate the final temperature of the gas
Answer:
P V = N R T describes an ideal gas
T2 / T1 = P2 V2 / (P1 * V1) = 4
T1 = 273 + 10 = 283 initial absolute temperature of gas
a sound wave strikes a wall normally what is the angle of reflection of sound wave
a 90°
b 60°
c 45°
d 0°
Answer:
C
Explanation:
Calculate the velocity of a 9.3 kg object that has 5.4 kgm/8
Answer:
To calculate the escape velocity: Find the object's mass in kilograms, m, and its radius in meters, r. Multiply m by the gravitational constant (6.674 × 10 −11) and then by 2. Divide the result of step 2 by r. Raise the result of step 3 by 0.5. The result is the escape velocity
Explanation:
Which characteristic makes a digital signal more useful than an analog signal for storing information?
A. A digital signal includes a spectrum of colors.
B. A digital signal cannot be heard by humans.
C. A digital signal is more difficult to copy.
D. A digital signal moves between a discrete number of values.
1. A ball is thrown horizontally at a height of 4.91 m above the ground. It has an initial speed of 16.0 m/s. How long will it take to drop to the ground? How far, measured horizontally from the launch point, will it strike the ground?
It will take the ball 1 s to drop to the ground
The distance from the launch point where the ball will strike the ground would be 16.0 m.
Projectile motionWe can use the kinematic equations of motion to solve this problem. The vertical motion of the ball can be described using the equation:
h = vit + 1/2g*t^2
where h is the initial height, vi is the initial vertical velocity (which is zero), g is the acceleration due to gravity (9.8 m/s^2), and t is the time taken to fall to the ground. Solving for t, we get:
t = sqrt(2h/g) = sqrt(2*4.91 m/9.8 m/s^2) = 1 s
The horizontal motion of the ball is uniform, since there is no horizontal acceleration. We can use the equation:
d = v*t
where d is the distance traveled, v is the initial horizontal velocity (which is 16.0 m/s), and t is the time taken to hit the ground (which is 1 s). Solving for d, we get:
d = v*t = 16.0 m/s * 1 s = 16.0 m
So the ball will strike the ground 16.0 meters away from the launch point, measured horizontally.
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On Saturday nights, Greg, likes to go to the Frisco Disco, where he can dance under the strobe light. The strobe contains a 200, u capacitor that stores charge over a 1000 V potential difference. If the strobe flashes 4 times each second, what is the current flow created by the strobe's capacitor?
Explanation:
The current flow created by the strobe's capacitor can be calculated using the formula:
I = C * (ΔV / Δt)
where I is the current flow, C is the capacitance, ΔV is the potential difference, and Δt is the time interval between flashes.
Substituting the given values, we get:
I = 200 * 10^-6 F * (1000 V / 1 s) * 4
Simplifying this expression, we get:
I = 0.8 A
Therefore, the current flow created by the strobe's capacitor is 0.8 amperes
help as soon u can pls! due in 45 mins!!
Which statement correctly represents a mineral?
1. any naturally forming substance made from one element
2. any chemical substance which forms naturally in the Earth
3. an element which is made into an object
4. any substance which develops in the ground
Minerals are any chemical substance which forms naturally in the Earth
Define mineral.
Minerals are those substances found in foods and in the earth that our systems require for healthy growth and development. Calcium, phosphate, potassium, sodium, chloride, magnesium, iron, zinc, iodine, chromium, copper, fluoride, molybdenum, manganese, and selenium are among the nutrients that are crucial for good health.
Compounds found only in living creatures are typically not considered minerals according to geological definitions. However, some minerals, like calcite, are frequently biogenic or, in terms of chemistry, are organic molecules (such as mellite). Additionally, living things frequently produce inorganic crystals (like hydroxylapatite), which are also found in rocks.
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Consider a particle with initial velocity v⃗ that has magnitude 12.0 m/s and is directed 60.0 degrees above the negative x axis.
What is the acceleration of a projectile when it reaches its highest point? What is its acceleration just before and just after reaching this point?
The acceleratiοn οf a prοjectile when it reaches its highest pοint is 0 m/s². And its acceleratiοn just befοre and just after reaching this pοint 10.39 m/s² at time 2.08 s.
What are the initial and final speeds?The speed at which an οbject travels when gravity exerts its first fοrce οn it is referred tο as its initial velοcity. In cοntrast, the speed and directiοn οf a mοving οbject fοllοwing its maximum acceleratiοn are measured by the final velοcity, a vectοr quantity.
What is a vectοr οf initial velοcity?The twο cοmpοnents οf a vectοr are used tο describe the single directiοn οf the vectοr's influence. The initial velοcity οf a prοjectile has bοth a hοrizοntal and a vertical cοmpοnent if it is launched at an angle tο the hοrizοntal.
Let's determine the [tex]\theta[/tex] angle of launch with respect to the positive x-axis.
[tex]\theta = 180^o-60.0^o = 120^o \\[/tex]
We will determine the particle's time οf flight from the equation of the vertical displacement of a prοjectile.
[tex]y = v_i\,\sin (\theta) \,t_g - \dfrac{1}{2} g\, t_g ^2 \,\,\,\,\,\,\,(1)\\[/tex]
Where:
y is the vertical displacement, [tex]{v_i[/tex] is the initial speed. [tex]\theta[/tex] is the launch angle. [tex]t_g[/tex] is the flight time. g is the acceleration due tο gravity.
If the initial vertical position is equal tο the final vertical position, then the vertical displacement is equal tο zero.
Substituting the known data in equatiοon (1)
[tex]\rm 0 = (12.0\,m/s)\sin (120^o)t_g - \dfrac{1}{2}(10\,m/s^2)}t_g ^2\\ 0 = {\rm 10.3923\,m/s^2 -(5\,m/s^2)}t_g \\[/tex]
[tex]\rm t_g = \dfrac{\rm 10.3923\,m/s^2}{\rm 5\,m/s^2} = {\rm 2.08\,s} \\[/tex]
Thus, The acceleration of a prοjectile when it reaches its highest point is 0 m/s². And its acceleratiοn just before and just after reaching this point 10.39 m/s² at time 2.08 s.
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PHYSICAl SCIENCE : How do jewelers detectives antique dealer or other scientist could use electromagnetic waves to determine the composition of unknown materials in the course of their jobs?
Answer: It detects any waves or any substance.
Explanation: Don't really know how to explain it but it detects specific stuff on every material, like a demand for Example, if it is real then it could scratch glass but glass couldn't scratch it.
pls help i need it for tomorrow
An unexpected result is examined a lot more closely, since it must disagree with some currently accepted theory to be accepted as unexpected.
What is an example of a hypothesis ?A scientist may develop the hypothesis that a given type of tomato will be red if it carries the gene for the colour red. The scientist then discovers that every tomato of this variety is red during investigation.
Hypotheses are frequently employed to promote scientific research and enhance knowledge. These clear declarations serve as the cornerstone for all research experiments.
Therefore, a problem in the creation of a hypothesis may lead to errors in the design of a whole experiment.
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Answer question in photo
The work done on the box, given that it moves 6.50 meters horizontally when a force of 25.72 N is applied is 144.78 J
How do I determine the work done on the box?Work is defined as the product of force and distance moved in the direction of the force. This is given as:
Work done (Wd) = force (F) × distance (d)
Wd = fd
When certain angle projection is involved, the work done is given as
Wd = FdCosθ
The following data were obtained from the question:
Distance (d) = 6.50 mForce (F) = 25.72 NAngle (θ) = 30°Workdone (Wd) =?The work done can be obtained as follow:
Wd = FdCosθ
Wd = 25.72 × 6.50 × Cos 30
Wd = 167.18 × Cos 30
Wd = 144.78 J
In conclusion, we can say that the work done is 144.78 J
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A ball of mass 20 g moving at 10 m s¹ horizontally collides with another ball of mass 40 g that is at rest. After collision the 20 g ball has a velocity of 4 m s at an angle of 50° relative to its original direction. Calculate the total change in kinetic energy of the system. A. 1.21 x 10-21 B. -121 x 10-21 C. 112 x 10-2 D. 815 x 102 E. -518 x 10-1
Answer:
We can use conservation of momentum and conservation of energy to solve this problem.
Conservation of momentum:
Initial momentum = final momentum
m1v1 + m2v2 = (m1 + m2)v'
where m1 = 20 g = 0.02 kg, v1 = 10 m/s, m2 = 40 g = 0.04 kg, v2 = 0, v' is the final velocity of both balls after collision.
Solving for v':
v' = (m1v1 + m2v2)/(m1 + m2)
v' = (0.02 x 10 + 0.04 x 0)/(0.02 + 0.04)
v' = 6.67 m/s
Conservation of energy:
Initial kinetic energy = final kinetic energy
(1/2)m1v1^2 + (1/2)m2v2^2 = (1/2)(m1 + m2)v'^2
where v' is the final velocity calculated from conservation of momentum.
Solving for the total change in kinetic energy:
ΔKE = (1/2)(m1v1^2 + m2v2^2) - (1/2)(m1 + m2)v'^2
ΔKE = (1/2)(0.02 x 10^2 + 0.04 x 0^2) - (1/2)(0.02 + 0.04) x 6.67^2
ΔKE = -0.518 J
Therefore, the answer is (E) -518 x 10^-1.
A caterpillar climbs 1.3 m up a tree, then 0.72 m right, out onto a limb to eat a leaf. What is the magnitude of the resultant displacement of the caterpillar? A 2.2 m , B1.4 m ,C 1.5 m ,D 1.1 m
The magnitude of the resultant displacement of the caterpillar is 1.4m. Therefore, option B is correct.
What is displacement?The change in the position of an object is called displacement, it is the distance between starting and endpoints. It has both magnitude and direction, it is a vector quantity.
If a caterpillar climbs 1.3 m up a tree, then 0.72 m right, the magnitude of resultant displacement is given by:
H² = P² + B²
H² = (1.3)² + (0.72)²
H² = 1.69 + 0.51
H = [tex]\sqrt2.2[/tex]
H = 1.4m
Thus, the magnitude of the resultant displacement of the caterpillar is 1.4m. Therefore, option B is correct.
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An object is moving at a velocity of 11.5 m/s to the left. How far does it move in
312.24 seconds?
Answer:
[tex]\huge\boxed{\sf d = 3590.76\ m}[/tex]
Explanation:
Given data:Velocity = v = 11.5 m/s
Time = t = 312.24 s
Required:Displacement = d = ?
Formula:d = v × t
Solution:d = 11.5 × 312.24
d = 3590.76 m[tex]\rule[225]{225}{2}[/tex]
A constant force is applied to an object, causing the object to accelerate at 6. 00 m/s2. What will the acceleration be if
The rate of acceleration if force is doubled is same, if the objects mass is doubled it is halved, if both the object mass and force are doubled the acceleration will be same , d- acceleration will be quadrupled
Newton's second law of motion states that force is equal to mass multiplied by acceleration: F = m * a, where F is the applied force, m is the object's mass, and an is the acceleration produced.
a- When the force is doubled, the acceleration doubles as well. Using the formula, we get:
F' = 2F
a' = F' / m = (2F) / m = 2F / (2m) = F / m = a
B- If the mass is doubled, the acceleration will be halved. Using the equation, we get:
m' = 2m
a' = F / m' = F / (2m) = a / 2
C- If both the force and the mass are doubled, the acceleration will remain the same. Using the equation, we get:
F' = 2F
m' = 2m
a' = F' / m' = (2F) / (2m) = F / m = a
D- If the force is doubled and the mass is halved, the acceleration will be quadrupled. Using the equation, we get:
F' = 2F
m' = m / 2
a' = F' / m' = (2F) / (m/2) = 4F / m = 4a
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The complete question is:
When a constant force is applied to an object, it accelerates at 6.0 m/s2. What will be the rate of acceleration if
the force doubled?
the object's mass doubled?
Both the force and the mass of the object are doubled?
The force is doubled, but the object's mass is cut in half?
Answer question in photo
The potential energy of an object is the product of its mass, acceleration due to gravity and height of the object from the surface. Here, the potential energy of the object is 3118.2 J.
What is potential energy ?Potential energy of an object is the energy generated by virtue of its position. It is the energy stored on the object when it is at rest. When the object starts moving its potential energy starts to convert to kinetic energy.
the potential energy of an object is related to its mass, acceleration due to gravity g and height from the surface h as:
P = mgh.
then, m = 26.21 Kg
h = 12.14 m
g = 9.8 m/s²
p = 26.21 Kg × 9.8 m/s² × 12.14 m = 3118.2 J.
Therefore, the potential energy of the object is 3118.2 J.
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Sonu is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, the distance between Sonu and his image will be: (a) 3 m (b) 5 m (c) 6 m (d) 8 m
Answer:
Originally Sonu and image is 8 m (4 m to mirror and 4 m to image)
If he moves 1 m towards the mirror the image distance will be reduced to (c) 6 m
Help quick.
Two objects, m1 and m2, have an elastic collision. The initial velocity of m1 is +6.0 m/s and of m2 is +4.0
m/s. After the collision, the velocity of m1 is +5.0m/s. What is the velocity of m2?
Answer:
u
1
=
6.0
m
/
s
u
2
=
4.0
m
/
s
v
1
=
5.0
m
/
s
Explanation:
A 50g
block is attached to a
horizontal spring with spring
constant k = 3600 N/m
The spring is compressed by 5 cm,
as shown in the figure.
When the spring is released, will the
block be able to cross the top of the hill with
h =10m?
The spring can not cross the hill.
What is the elastic potential energy?Elastic potential energy is the potential energy stored in an object when it is deformed, or stretched or compressed, by a force. When an elastic object is stretched or compressed, it has the potential to return to its original shape and size, and the work done to stretch or compress it is stored as elastic potential energy.
We know that;
E = 1/2Ke^2
E = 0.5 * 3600 * (5 * 10^-2)^2
E = 4.5 J
Now the GPE of the hill is;
mgh = 50 * 10^-3 * 10 * 9.8
= 4.9 J
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Thirteen resistors are connected across points A and B as shown in the figure. If all the resistors are
accurate to 2 significant figures, what is the equivalent resistance between points A and B?
The equivalent resistance between points A and B in the diagram is 22 Ω
How do I determine the equivalent resistance?We shall begin by obtaining the equivalent resistance in parallel (i,e the three 6 Ω resistor). Details below:
Resistor 1 (R₁) = 6 ΩResistor 2 (R₂) = 6 ΩResistor 3 (R₃) = 6 ΩEquivalent resistance (Rₜ) = ?1/Rₜ = 1/R₁ + 1/R₂ + 1/R₃
1/Rₜ = 1/6 + 1/6 + 1/6
1/Rₜ = 3/6
1/Rₜ = 1/2
Rₜ = 2 Ω
Finally, we shall determine the equivalent resistance between A and B (i.e series arrangement). Details below:
Resistor 1 (R₁) = Resistor 2 (R₂) = ... = Resistor (R₁₁) = 2 ΩEquivalent resistance (R) =?R = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ + R₇ + R₈ + R₉ + R₁₀ + R₁₁
R = 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2
R = 22Ω
Thus, we can conclude that the equivalent resistance is 22 Ω
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When you switched the direction of the voltage on the battery the magnetic compass needle moved. Which of the following is the best explanation for the movement of the compass needle?
A- The copper wire magnetized the compass needle.
B- The compass needle magnetized the copper wire.
C- The current in the wire produced a magnetic field.
D- The compass needle moved due to the Earth's magnetic field and was unaffected by the electromagnet.
The correct explanation for the movement of the compass needle when the direction of the voltage on the battery is switched is (C) The current in the wire produced a magnetic field.
What is voltage?Voltage, also known as electric potential difference, is a measure of the electric potential energy per unit of charge in an electrical circuit. It is the force that drives the flow of electric charge in a circuit. Voltage is usually measured in volts (V) and is represented by the symbol "V".
When an electric current flows through a wire, it creates a magnetic field around the wire. The direction of the magnetic field depends on the direction of the current flow.
This magnetic field interacts with the Earth's magnetic field and causes the compass needle to move. Therefore, as the direction of the current in the wire changes when the voltage on the battery is switched, the direction of the magnetic field around the wire also changes, causing the compass needle to move.
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