Answer:
c
Explanation:
Does an object with constant speed also have constant velocity?
Which is an example of current electricity?
A. A person's hair stands up as a wool hat is pulled off.
B. A child rubs a balloon against the carpet and then sticks it to a
wall.
C. Negatively charged particles are repelled by other negatively
charged particles.
D. A battery provides electrical energy to power a phone.
HURRY UP !!!
Answer:
D. A battery provides electrical energy to power a phone.
Explanation:
Examples of current electricity are starting a car, turning on a light, cooking on an electric stove, watching TV, shaving with an electric razor, playing video games, using a phone, charging a cell phone and more.
A battery provides electrical energy to power a phone.
What is energy?
Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.
Examples of current electricity are starting a car, turning on a light, cooking on an electric stove, watching TV, shaving with an electric razor, playing video games, using a phone, charging a cell phone and more.
A battery provides electrical energy to power a phone.
To learn more about energy refer to the link:
brainly.com/question/1932868
#SPJ2
what is the correct answer?
Answer:
B) x^2+6x+8
Explanation:
x-4 | x^3+2x^2-16x-32
- x^3-4x^2 <-- (x-4)(x^2)
_________________
6x^2-16x-32
- 6x^2-24x <-- (x-4)(6x)
_________________
8x-32
- 8x-32 <- (x-4)(8)
___________________________
0 | x^2+6x+8
This means the answer is B) x^2+6x+8
Which of the following best describes the circuit shown below?
A) series
B)open
C)parallel
D)short
Answer:it is b i just did this
Explanation:
Answer: i think its b hope this helped :)
Explanation:
Diamond is the one mineral in the world that cannot be scratched by any other mineral. Therefore, we refer to diamond as the ____________ mineral.
A. hardest
B. purest
C. densest
D. lustrous
A,B,C,D pick a answer
Answer:
hardest
Explanation:
Diamonds are known as the hardest naturally occurring substance known.
Answer:
A. hardest
Explanation:
A cylindrical container is filled with oil to a depth of 32cm. If the pressure exerted at the base of the container is known to be 2560pa then, how much is the density of the oil?
Answer:
Ro = 815.5 [kg/m³]
Explanation:
We must use the following equation to find the hydrostatic pressure exerted on the bottom of the cylinder.
[tex]P=Ro*g*h[/tex]
where:
P = pressure = 2560 [Pa]
Ro = density [kg/m³]
g = gravity acceleration = 9.81 [m/s²]
h = elevation = 32 [cm] = 0.32 [m]
[tex]2560=Ro*9.81*0.32\\Ro=815.5 [kg/m^{3} ][/tex]
Answer:
800kg/m^3
Explanation:
roh=2560/0.32m×10m/s^2
800kg/m^3
Change 32 cm to m to make it more easier.
Gravitational acceleration is 10m/s^2.
HOPE THAT I HELPED YOU!
Plzz helpp!!!!!!!!!!!!!!!
Answer:
the answer ischarge of +3
A bumblebee has a charge of 1.0 µC is placed 10.0 cm from a charge of 2.5 µC. What is the magnitude of the electric force?
Answer:
F = 2.25 N
Explanation:
Given that,
Charge 1, [tex]q_1=1\ \mu C = 10^{-6}\ C[/tex]
Charge 2, [tex]q_2=2.5\ \mu C=2.5\times 10^{-6}\ C[/tex]
Distance between charges, d = 10 cm = 0.1 m
We need to find the electric force between charges. The formula that is used to find the electric force is given by
[tex]F=\dfrac{kq_1q_2}{d^2}\\\\F=\dfrac{9\times 10^9\times 10^{-6}\times 2.5\times 10^{-6}}{(0.1)^2}\\\\=2.25\ N[/tex]
Hence, the force between charges is 2.25 N.
state the term using to describe the turning force force exerted by the man
Answer:
The distance between the line of action of force and the axis of rotation (or pivoted point)
Explanation:
The distance between the line of action of force and the axis of rotation (or pivoted point) .
The speedometer shows the cart’s speed, or how fast it moves. A speed of 30 cm per second means the cart moves 30 cm every second. What was the final speed of the cart?
The Final speed of the cart = ( Δ Distance ) / time travelled
Although your question lacks some missing data a general answer is provided within the scope of your question .
Given that:
Speed = Distance / time
Initial speed of the cart = 30 cm/sec
The Final speed of the cart ( V ) = Δ Distance / time
Hence we can conclude that the final speed of the cart will be ( Δ Distance ) / time travelled.
Learn more : https://brainly.com/question/6108244
Temperature represents the average potential energy of molecules
within a substance.
True or False
Answer:false
Explanation:
a moving object has the clockwise function: s = 5 + 2t (no S.I). determine its position when t = 7 s B) in which moment does the moving object surpass the position s = 25m? Need an answer pls :)
What are the two factors of energy?
how much mass or speed will the object have
A 1000 kg whale is dropped at a rate of 9.8 m/s2. With what force will it hit the ground?
Answer:
If your teacher doesn't ask u to turn kg into lb:
F = m × a
F = 1000kg × 9,8m/s2
F = 9800N
If she does ask u then:
m= 1000kg × 2,206 = 2204.62lb
use the same formula
The force with which the whale will hit the ground is 9800 Newtons.
Given the data in the question:
Mass of whale; [tex]m = 1000kg[/tex]Acceleration at which the whale was dropped; [tex]a = 9.8m/s^2[/tex]Force; [tex]F = \ ?[/tex]
To determine the force with which the whale will hit the ground, we use Newton's second law of Motion;
[tex]F = m * a[/tex]
We substitute our values into the equation
[tex]F = 1000kg * 9.8m/s^2\\\\F = 9800kgm/s^2\\\\F = 9800N[/tex]
Therefore, the force with which the whale will hit the ground is 9800 Newtons.
Learn more about Newton's law of motion: brainly.com/question/20066791
to be truthful i'm really tired right now and do not feel like searching for this answer so!
Answer:
According to Newton's 2nd law, if the net force applied on an (moving) object increases then the acceleration proportionately increases, according to force equals the mass multiplied by the acceleration, (Force = Mass × Acceleration). Mass is held constant
Explanation:
Newton's second law states that the acceleration, a, at which an object moves is directly proportional to the net force, F, applied on the object and is inversely proportional to the mass, m, of the object
Mathematically, we have;
a ∝ F, and a ∝ 1/m
Therefore;
According to Newton's 2nd law, if the net force applied on an (moving) object increases then the acceleration proportionately increases, according to force equals the mass multiplied by the acceleration, (Force = Mass × Acceleration). Mass is held constant
When looking at liquids in a container, that have layered on one another;
the most dense liquid will be
a. at the top
b. in the middle
c. at the bottom
Answer: C. At the bottom
Pls help I give brainLy and a thanks and points
A college student likes to take her books to class by placing them in a box and pulling the box around behind her. She pulls on the box with a force of 90.0 N at an angle of 30.0⁰ relative to the horizontal. The box of books has a mass of 20.0 kg and the coefficient of kinetic friction between the bottom of the box and the sidewalk is 0.500. What is the net force acting horizontally and what is the acceleration of the box as she pulls it around?
Answer:
It would result an a negatice answer.
Explanation:
The accelarion should be pulled as a kite not a box :) columbus said that musical stuff no just no
Hope this helps!!
- Katty queen
give at least 4 human activities which demonstrate the involvement of inertial frame of reference
What is the potential energy of the 450 kg glass on the 18 m high desk?
Answer: 12 J
Explanation: because of the potential energy
The speed of sound is 331 m/s:
in a vacuum
in air, water, or any other medium
in air at 0°C
in air at any temperature
Answer:
331 m/s in air at 0 degC.
Explanation:
Cooler the air slower the speed of sound.
Normal air temp: 20 C/68 degF is 343m/s
0 m/s in a vacuum/outer space
faster yet in water
think of a famous person and gather information about him/her
Abraham Lincoln
Explanation:
hope it helps you a little
4. During a road test, a driver brakes a 1420 kg car moving at 64.8 km/h [W]. The car
slows down and comes to a stop after moving 729 m [W].
(a) Calculate the net force acting on the car. (ans: 316 N [E]
(b) What is the force of friction acting on the car while it is slowing down? Explain
your reasoning. [ans: 316 N [E]]
Answer:
a. -312.4 N or 312.4 N [E] b. -312.4 N or 312.4 N [E]
Explanation:
a. Using v² = u² + 2as where u = initial velocity of car = 64.8 km/h = 64.8 × 1000 m/3600 s = 18 m/s, v = final velocity of car = 0 m/s since the car stops, a = deceleration of car and s = distance car moved = 729 m.
So, making the acceleration subject of the formula, we have
a = (v² - u²)/2s
substituting the values of the variables, we have
a = ((0 m/s)² - (18 m/s)²)/(2 × 729 m)
= - (18 m²/s²)/(2 × 729 m)
= -324 m²/s² ÷ 1458 m
= -0.22 m/s²
So, the net force , F acting on the car is F = ma where m = mass of car = 1420 kg and a = deceleration = -0.22 m/s².
So, F = ma = 1420 kg × -0.22 m/s² = 312.4 N or 312.4 N [E]
b. Since no forward force acts on the car while it is slowing down, the frictional force equals the force acting to stop the car, f = ma which is equal to the net force where m = mass of car = 1420 kg and a = deceleration = -0.22 m/s²
So, f = ma = 1420 kg × -0.22 m/s² = -312.4 N or 312.4 N [E]
a) The net force acting on the car will be 312.4 N [E]
(b) The force of friction acting on the car will be 312 N [E].
What is the friction force?It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).
Mathematically it is defined as the product of the coefficient of friction and normal reaction.
The given data in the problem is;
m is the mass of car=1420 kg
u is the initial speed 64.8 km/h = 4.8 × 1000 m/3600 s = 18 m/s
v is the final speed =0 m/sec
s is the distance travelled before stop= 729 m
a is the deceleration = -0.22 m/s².
a) The net force acting on the car will be 312.4 N [E]
The value of net force is found with the help of Newtons third equation of motion;
[tex]\rm v^2=u^2+2as\\\\ \rm a= \frac{v^2-u^2}{2s} \\\\ \rm a= \frac{(0)^2-(18)^2}{2\times 729} \\\\ \rm a= 0.22 \ m/s^2[/tex]
So the net force will be;
[tex]\rm F = ma \\\\\ \rm F = 1420 \times 0.22 ² \\\\ \rm F =312.4\ N [E][/tex]
Hence the net force acting on the car will be 312.4 N [E]
(b) The force of friction acting on the car will be 316 N [E].
The frictional force equals the force working to stop the automobile,
f = ma,
Which is equal to the net force,
The force of friction will be
[tex]\rm F_f= m \times a \\\\\ \rm F_f= 1420\times -0.22 \\\\ \rm F_f= -312.4 N [E][/tex]
Hence the force of friction acting on the car will be 312 N [E].
To learn more about the friction force refer to the link;
https://brainly.com/question/1714663
How can the motion of an object be changed?
which of the following does not dissolve in water
Answer:
Sand,Mud
Explanation:
Sugar and salt are examples of soluble substances. Substances that do not dissolve in water are called insoluble. Sand and flour are examples of insoluble substances.
j. Ram travels 50 m on a straight road in 30 s. Hari covers the same distance
on the same road in 45 s. Who has done more work? Who has more power? Explain in short
Explanation:
Explanation:
In the given question, there are two conditions.
Ram traveled 50 m in 30 seconds in a straight road.
Hari covers the same distance in the road; that means 50 m in 45 seconds
The formula for work w=\frac{d}{t}w=td
Ram's work w=\frac{50}{30}=1.66666w=3050=1.66666
Hari's work w=\frac{50}{45}=1.111w=4550=1.111
Ram is slower than Hari and the velocity of Ram is slower than Hari.
Ram has done less work than Hari.
Hence, Hari has done more work and he has more power than Ram.
What is the Energy of a 50.0 kg bucket of oil at the top of a 3.00 meter high platform?
O 1470J
O 1240J
O 2410J
O 2180J
O 1750J
4 Previous
A bowling ball is traveling with a velocity of 12m/s. Its momentum is 114 kgm/s. What is the mass of the bowling ball. Include the correct units in your answer.
Answer:
9.5 kgExplanation:
The mass of the bowling ball can be found by using the formula
[tex]m = \frac{p}{v} \\ [/tex]
p is the momentum
v is the velocity
From the question we have
[tex]m = \frac{114}{12} = \frac{19}{2} = 9.5 \\ [/tex]
We have the final answer as
9.5 kgHope this helps you
Developing Knowledge
Warm-Up
Match each step of the learning process with the correct part of the scenario.
Elle can explain the rock cycle to a
experience
classmate without using her notes
Elle's teacher explains the rock cycle
review
Elle studies her notes at home.
learn
Elle correctly labels parts of the rock cycle
on her exam.
apply
Done
Intro
Answer:
?
Explanation:
i don't understand what you saying
Find the gravitational force between a 9354873 kg billiard ball and a 7389418 kg billiard ball of the between them is 384,399,861 m.
Answer:
3.12×10¯¹⁴ N
Explanation:
From the question given above, the following data were obtained:
Mass 1 (M1) = 9354873 kg
Mass 2 (M2) = 7389418 kg
Distance apart (r) = 384399861 m
Force (F) =?
NOTE: gravitational constant (G) =. 6.67×10¯¹¹ Nm²Kg¯²
The gravitational force between the two ball can be obtained as follow:
F = GM1M2/r²
F = 6.67×10¯¹¹ × 9354873 × 7389418 / (384399861)²
F = 4610.77536 / (384399861)²
F = 3.12×10¯¹⁴ N
Thus, the force of attraction between the two balls is 3.12×10¯¹⁴ N
