Answer:1kwh
Explanation:E=PT
E=1000w(3600s)
E=1kwh
A small metal ball is given a negative charge, then brought near to end a of the rod (figure 1). What happens to end a of the rod when the ball approaches it closely this first time?.
What happens to end a of the rod when the ball approaches it closely this first time is; It is strongly attracted.
ElectrostaticsI have attached the image of the rod.
We are told that the ball is much closer to the end of the rod than the length of the rod. Thus, if we point down the rod several times, the distance of approach will experience no electric field and as such the charge on end point A of the rod must be comparable in magnitude to the charge on the ball.
This means that their fields will cancel.
Finally, we can conclude that when a charge is brought close to a conductor, the opposite charges will all navigate to the point that is closest to the charge and as a result, a strong attraction will be created.
This also applies to a strong conducting rod and therefore it is strongly attracted.
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A speeding train slams on the brakes when it sees a car is on the tracks in front of it. It takes the train 25 seconds for it to go from an initial speed of 75 m/s to come to a complete stop. What is the train’s acceleration?
Answer:
Acceleration of the train is -3 m/s²
Explanation:
Since it stops,
final velocity (v) = 0 m/s
time (t) = 25 seconds
initial velocity(u) = 75 m/s
Now,
accelereation = (v-u)/t
or, a = (0-75)/25
or, a = -75/25
so, a = -3 m/s²
The height of the Empire State Building is 318.00 meters. If a stone is dropped from the top of the building, what is the stone's velocity just before
it strikes the ground?
Answer:
79
Explanation:
A force has both______ and _______. Question 1 options: Speed and impact Magnitude and direction Motion and speed Direction and motion.
Answer:
magnitude
and direction
Explanation:
As force is a vector quantity, force has both magnitude and direction.
What is vector quantity?A physical quantity that has both directions and magnitude is referred to as a vector quantity.
A lowercase letter with a "hat" circumflex, such as "û," is used to denote a vector with a magnitude equal to one. This type of vector is known as a unit vector.
The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body.
It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
A spring balance can be used to calculate the Force. The Newton is the SI unit of force.
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Which planet in our solar system has the largest ring system?.
Answer:
Saturn
Explanation:
Saturn has the most spectacular ring system, with seven rings and several gaps and divisions between them.
You dribble a basketball while walking on a basketball court list and describe 3 pairs of action-reaction forces
Answer:
1. Walking
2. Pushing the basketball with hand
3. Ball bouncing off the ground
Explanation:
As per Newton's third law of motion every action has an equal and opposite reaction. Looking at the given scenario following are the pairs of action-reaction forces:
1. Walking: When you walk, you apply action and push the ground and the ground pushes you back with the same force.
2. Pushing the basketball with hand: when you push the ball that is action, the ball also applies force on your hand which is the reaction.
3. Ball bouncing off the ground: When ball hits the ground, it applies force i.e. action and the ground pushes it back with the same force which is the reaction.
Can anyone help me please I beg you I don’t understand I will give you Brainliest
Answer:
75 grams
real is 85
Explanation:
you say you where 10 grams off.
Answer:
I may not have an actual clay ball but judging from the size and shape I can reason it should be 70 - 90 grams.
Estimation:
I estimate it to be 80 grams in weight
Actual mass:
85 grams
Distance between estimation and the actual amount:
85 - 80 = 5 gram difference
Explanation:
Have a great rest of your day
#TheWizzer
OPEN ENDED QUESTION
Tell me 3 things you know about waves.
What is the magnitude of the torque about the origin of the force (−3i^ 3 j^ 4 k^) n if it is applied at the point whose position vector is r⃗ =(−2i^ 4j^) m.
The torque vector τ has magnitude
|τ| = |F| |r| sin(θ)
where θ is the angle made by the force vector F and position vector r.
Recall the dot product identity,
F • r = |F| |r| cos(θ)
and use to find the measure of the angle in question.
F = (-3 i + 3 j + 4 k) N
r = (-2 i + 4 j) m
F • r = (6 + 12 + 0) N•m = 18 N•m
|F| = √((-3 N)² + (3 N)² + (4 N)²) = √34 N
|r| = √((-2 m)² + (4 m)²) = √20 m
So, we have
cos(θ) = (18 N•m) / ((√20 m) (√34 N)) = 9/√170
⇒ θ = arccos(9/√170) ≈ 46.3°
Now just find |τ| :
|τ| = (√34 N) (√20 m) sin(arccos(9/√170))
|τ| = (√680 N•m) sin(arccos(9/√170))
|τ| = (√680 N•m) √(89/170)
|τ| = 2√89 N•m ≈ 18.9 N•m
What is the gravitational potential energy of a 2.0-kg book 1.5 m above the floor?
Answer:
Gravitational potential energy is 29.4 J
Explanation:
Data :
Mass = m = 2 kg
Height = h = 1.5 m
Applying Gravitational Potential formula
U = mgh
U = 2 × 9.8 × 1.5
U = 29.4 J
Under which circumstances would protesters’ right to assembly most likely be protected?
if protesters were picketing on an alleged criminal’s front lawn
if protesters were marching on the statehouse in favor of marriage for all
if protesters were inciting others to destroy restaurants serving unhealthy foods
if protesters were throwing rocks at police to prevent arrest
Answer:
Explanation:
Mob violence is never protected. Organizers are always careful about not letting things get out of hand. Not D
That remark sort of applies to C as well. Property destruction is never protected.
B is something assemblies are allowed to do. So B.
A falls into the same category as C and D. You may not like the fact that he/she is doing something illegal, but you can't take away their privacy.
Answer:
if protesters were marching on the statehouse in favor of marriage for all. choice B
Explanation:
A 25.0 kg object moving at +15.0 m/s strikes a 15.0 kg
mass moving at -10.0 m/s. If the 25.0 kg object moves off
at -2.00 m/s, what is the velocity of the 15.0 kg object?
The final velocity of the 15 kg mass is 18.33 m/s.
Conservation of linear momentumThe final velocity of the 15 kg mass can be determined by applying the principles of conservation of linear momentum as follows;
[tex]m_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2\\\\[/tex]
Where;
m₁ is the mass of the first object = 25 kgu₁ is the initial velocity of the first object = 15 m/sm₂ is the mass of the second object = 15 kgu₂ is the initial velocity of the second object = -10 m/sv₁ is the final velocity of the first object = -2 m/sv₂ is the final velocity of the second objectThus, the final velocity of the 15 kg mass after the collision is 18.33 m/s.
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Why do noble gasses rarely react with other elements?
Tarzan is hanging onto a vine, while standing on a branch. What will be his speed when he gets to the bottom of the swing if the branch was 6 m above this lowest point of his swing?
Answer: His weight plus the centripetal force must equal 1170 N
Explanation:
83.0 [g + (v^2 / r)] = 1170
v^2 / 18.0 = (1170 / 83.0) - 9.81
2. An overseas jet requires 6 hours to fly 9700 km. What is the jet's speed?
Answer:
Most commercial aircraft typically fly at around 460-575 mph, or 740-930 km/h, according to Flight Deck Friend. But private jet speed can vary depending on a variety of factors, such as the weight onboard and the weather conditions.
State the basic assumptions of the kinetic theory.
a- All matter is composed of small particles;
b- The particles are in constant motion;
c- Molecules are smaller than atoms.
d- The energy lost in the collisions is negligible.
e- These particles are constantly colliding;
i need help so fast pls im in a exam !!!
Answer:
option a
Explanation:
a- All matter is composed of small particles.
Explanation:
The following are the basic assumptions of the Kinetic Molecular Theory: The volume occupied by the individual particles of a gas is negligible compared to the volume of the gas itself. ... Gas particles are in a constant state of random motion and move in straight lines until they collide with another body.
Batman is driving the Batmobile on the road in Gotham City. Which of the following may be true about this ride?
A: If the vehicle has velocity, it will always be accelerating.
B: If the vehicle has velocity, it cannot be accelerating
C: If the vehicle has velocity, it may or may not be accelerating
D: If the vehicle has no velocity, it is always accelerating.
Answer:
A
Explanation:
i dont really have an explanation but it just seems correct yk?
a 2.0 kg ball is dropped from a height of 20 m onto a soft surface and rebounds to a height of 5.0 m . what is the magnitude of the impulse exerted on the ball by the floor?
Based on the data provided, the impulse of the floor on the ball is 59.4 Ns.
What is the impulse of the floor on the ball?Using the equation of motion to determine the velocity at the end of the fall
v^2 = u^2 + 2ghWhere v is velocity at the end of fall
u is initial velocity = 0
g is acceleration due to gravity = 9.81 m/s^2
h is height = 20
Taking downward velocity as negative and up as positivev^2 = 0 + 2 (9.81)(20)
v^2 = 392.4
v = - 19.8 m/s
The velocity, v after bouncing is calculated also:
u = 0
g = 9.81 m/s^2
h = 5.0 m
v^2 = 0 + 2(9.81)(5)
v^2 = 98.1
v = 9.904 m/s
Impulse = change in momentum Impulse = m(v- u)Impulse = 2.0 × (9.9 -(-19.8)
Impulse = 59.4 Ns
Therefore, the impulse of the floor on the ball is 59.4 Ns.
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43.5 kg. Shawn rides his bike 1.3 km in
10.4 min at a constant velocity.
The acceleration of gravity is 9.8 m/s^2.
What is Shawn’s kinetic energy?
Answer in units of J.
Answer:
K.E is 90.625 J
Explanation:
Data:
Mass = m = 43.5kg
Distance = d = 1.3km = 1300 m
Time = t = 10.4 min = 624 sec
Accelaration = a or g = 9.8
Formula for kinrtic energy
K.E = 1/2mv²
Find velocity
V = d/t = 1300/624 = 2.0833333333333 m/s
Put values in formula
K.E = 1/2 (43.5)(2.084)² = 90.624999999995
Mark brainliest if you understand it
. A 225-kg crate is pushed horizontally with a force of 710 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate
The acceleration of the crate is 1.196 m/s².
What is acceleration?This can be defined as the rate of change of velocity.
To calculate the acceleration of the crate, we use the formula below.
Formula:
a = (F-mgμ)/m................. Equation 1Where:
a = acceleration of the cratem = mass of the crateF = Force applied to the crateμ = Coefficient of frictionFrom the question,
Given:
m = 225 kgF = 710 Ng = 9.8 m/s²μ = 0.20Substitute the values above into equation 1
a = [710-(225×9.8×0.20)]/225a = (710-441)/225a = 269/225a = 1.196 m/s²Hence, The acceleration of the crate is 1.196 m/s²
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Please help! thank you!
Answer:
A: The kinetic energy of the two vehicles is transferred to potential energy when it stops.
B: The more mass an object has the more kinetic energy it will have.
Explanation:
This may be the right answer for your question but if it isn't my bad.
The origin of our solar system is attributed to the collapse of a single, rotating interstellar cloud of gas and dust known as a(n)
Answer:
nebula also called solar nebula
Explanation:
What is the difference between speed and velocity?
[tex] \huge \sf \underline{ \color{green}Ⱥnswɇɍ : }[/tex]
Speed is a scalar quantity.Speed ascertain how fast a body moves.[tex] \large \sf \: Speed = \frac{distance}{time} [/tex]____________________________
Velocity is a vector quantity.Velocity Ascertain the object speed & the director on it takes while moving.[tex] \large \sf \: velocity = \frac{displacement}{time} [/tex]Hope Helps~The difference between the two concepts lies in the type of magnitude they represent, speed is a scalar magnitude, while velocity is a vectorial magnitude.
What is speed?It is the variation of distance in a certain time as a consequence of the movement of a mobile element.
What is velocity?It is the vectorial magnitude that shows and expresses the variation in terms of position of an object and as a function of time.
Therefore, we can conclude that speed is a scalar magnitude that determines the ratio of the distance traveled by a body and velocity is a vectorial magnitude that expresses the relationship between the space traveled by an object, the time used for it and its direction.
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how does a push or pull affect motion?
Answer:
The motion of an object acted on by a force depends partly on the strength of the push or pull. The stronger the push or pull, the faster the object will move.
Explanation:
A velocity-time graph shows how ____ changes over time.
Consider a point on the outer edge of the tire. What is the centripetal acceleration, ac, at this point in m/s2
The centripetal acceleration is obtained as v^2/r.
What is centripetal acceleration?Circular motion refers to motion along a circular path. There are two forces that act on a body undergoing circular motion;
Centripetal force which keeps it in the pathCentrifugal force which throws it out of the pathThe centripetal acceleration is obtained as v^2/r where v is the linear velocity and r is the radius. The unit is m/s2.
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A certain 800-kg car has a motor whose power output is
30 kW. If the car is carrying two passengers whose total mass
is 150 kg, how long will it need to accelerate from 70 to 110
km/h?
Based on the relationship between power and time, the time required is 10.67 seconds
What is the time required for the car to accelerate from 70 to 110 km/h?Force produced by the car = mass × acceleration
Force produced by the car engine = 30 kW = 3000 kW
mass of car = 800 Kg
acceleration of car = changein velocity / time
acceleration = 110 - 70/t = 40/t
3000 = 800 × 40/t
t = 32000/3000
time, t = 10.67 seconds
Therefore, the time required is 10.67 seconds
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What happens to gravitational potential energy as a rollercoaster moves down a hill? Question 4 options: It is converted to elastic potential energy It increases It is converted to kinetic energy It remains constant.
The gravitational potential energy as a rollercoaster converts to kinetic energy when it moves downhill.
What is kinetic energy?
The kinetic energy of an object or body is due to its motion. When the roller coaster moves downhill it accelerates, thus the gravitational potential energy as a rollercoaster converts to kinetic energy.
The gravitational potential energy of an object or body is due to its position above the ground.
Therefore, the gravitational potential energy as a rollercoaster converts to kinetic energy when it moves downhill.
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5) What type of substance can seep
groundwater and make it unusable?
Answer:
I believe chemicals, though I might be wrong.
Explanation:
It takes 700 joules to lift an object straight up, but 1400 joules to push it up a ramp, what is the
efficiency of the ramp?
Answer:
561
Explanation: it would most definitely go down as a number because it isn't the same
