Answer:
force makes an object move
If you go twice as fast, your kinetic energy becomes. . .Immersive Reader
(1 Point)
2 times smaller
4 times smaller
2 times bigger
4 times bigger
Answer:
Our kinetic energy becomes 4 times bigger
If a microwave consumes 944 W of power when it is plugged into a 112 V outlet, what is the
resistance of the microwave?
answer: 3.2 volts
i hope this is right
32g of water at 60°C is poured into 60g of cold water at 15°C, which is contained in a
calorimeter of mass 40g, and S.H.C of water is 0.1Jg'K'. Neglecting heat loss show that
the resulting temperature is 29°C.
Explanation:
Let thermal capacity of the vessel be C' J K-1
Heat energy given by hot water = 40 x 4.2 x (60 - 30) = 5040 J
Heat energy taken by cold water = 50 x 4.2 x (30 - 20) = 2100 J
Heat energy taken by vessel = C' x (30 - 20) = 10 C' J
If there is no loss of heat energy,
Heat energy given by hot water = Heat energy taken by cold water and vessel
or 5040 = 2100 + 10 C'
or 10 C' = 2940
or C'= 294 J K-1
Thus, thermal capacity of vessel = 294 J K-1.
HOPE IT HELPS mark me in brainliest answers please please pleaseAccording to Newton's 2nd Law, why does a full shopping cart take more
force to accelerate than an empty shopping cart? *
the full cart has more mass
the full cart has less mass
the full cart has more gravity acting on it
O the full cart has more friction acting on it
The speed limit on an interstate highway is posted at 75mi/h. What is the speed in kilometers per hour? In feet per second?
Answer:
See explanation
Explanation:
The conversion factor from miles per hour to kilometers per hour is 1.609344.
Hence;
To convert 75mi/h to kilometers per hour,
75mi/h * 1.609344 = 120.7 kilometers per hour
b)
To convert 75mi/h to feet per second
Since
1 mile per hour = 1.46667 foot per second
75mi/h = 75 * 1.46667 = 110 feet per second
A 2-kg toy car accelerates from 0 to 5 m/s2. It
travels 2 m.
A 2-kg toy car originally moving at 5 m/s is
brought to rest. It travels 1 m.
A 2 kg toy car is held at a height of 3.75 m
above the floor.
A 2-kg toy car accelerates from 5 to 10 m/s2. It
travels 7 m.
A 2-kg toy car accelerates from 10 to 5 m/s?. It
travels 10 m.
Answer choices:
20 joules of work is done by the object
No work is done on or by the object
10 joules of work is done by the object
100 joules of work is done by the car
70 joules of work is done by the car
The work done by the toy car when it travels 2 m is 20 J.
The work done by the toy car when it travels 1 m is 10 J.
The work done by the toy car held 3.75 m above the ground is zero.
The work done by the toy car when it travels 7 m is 70 J.
The work done by the toy car when it travels 10 m is 100 J.
Work done by the toy car when it travels 2 mThe work done by the toy car when it travels 2 m is calculated as follows;
W = Fd
W = (ma)d
W = (2 x 5) x 2
W = 20 J
Work done by the toy car when it travels 1 mThe work done by the toy car when it travels 1 m is calculated as follows;
W = Fd
W = (ma)d
W = (2 x 5) x 1
W = 10 J
Work done by the toy car held 3.75 mWork is said to be done when an object is displaced from its initial position. Since the car wasn't displaced, the work done is zero.
Work done by the toy car when it travels 7 mThe work done by the toy car when it travels 7 m is calculated as follows;
W = Fd
W = (ma)d
W = 2(10 - 5) x 7
W = 70 J
Work done by the toy car when it travels 10 mThe work done by the toy car when it travels 10 m is calculated as follows;
W = 2 x (5 - 10) x 10
W = -100 J
Lear more about work done here: https://brainly.com/question/8119756
will mark brainliest if correct
How do you think cross-pollination may be different from self-pollination?
Don't Answer if you don't know please :)
Answer:
cross polination lets the best of flowers combined in one whille self polination only reproduces itself alone which is a great caracter it can live alone
Explanation:
Complete this sentence. Thermal energy only moves when ______
Answer:
when their is heat, because thermal uses heat to generate energy
A crowbar is used to lift a load of 1200 N by placing it at a distance of 25 cm from the fulcrum.
the force required at 60 cm from the fulcrum to balance the load.
Answer:
500 N
Explanation:
From the question,
Sum of clockwise moment = sum of anti clockwise moment.
F×d = F'×d'.................. Equation 1
Where F = Force applied to lift the load, d = distance, F' = Force required, d' = distance of the required force from the fulcrum
Make F' the subject of the equation
F' = F×d/d'.................. Equation 2
Given: F = 1200 N, d = 25 cm, d' = 60cm.
Substitute these values into equation 2
F' = 1200×25/60
F' = 500 N.
Hence the force required to balance the load is 500 N
mechanism of doping in physics
Select the correct answer
Ballon A is either positively, negatively, or not
Balloon C is either positively, negatively, or not
The last question is either attractive or repulsive
The raising and lifting the ball by kicking is called
A Dodge
B. Scoop
C. Passing
D. Toe
I’ll give brainless plis
The raising and lifting the ball by kicking is a B) Scoop
When a ray is incident upon a plane mirror as shown in the diagram, what is the angle of refraction?
a) 90 degrees
b) 30 degrees
c) 0 degrees
Answer:
0 degrees
Explanation:
this is because when the light ray hits a surface a medium at 90 degrees then the angle of incidence = 0 , thus light doesn't bend when it enters the medium, no bending means angle of refraction is 0 degrees
hope this helps ,please mark it
An object has a charge of +2.0 uC. What is magnitude of the electric force on the object by an
electric field of 5.0 N/C?
Answer:
hahahahahahahaahahahaha
Explanation:
wala ka kwenta bobo Wala g utak 150 hahahahahahahahahahaahahahahahahahahahahahahahshahahshshshshahahahahahahahahahahahahaahahahhaahahah
Write down the letter of the substance that represents water
Answer:
If you are talking about it's "scientific" name, it is H_2O
Explanation:
The attached image is what the name really looks like, it wouldn't let me type it correctly on here.
Please consider giving me brainliest if this helped you! :)
help me, what is the shape of solid?
Explanation:
Solids have a definite shape and definite volume.
Answer:
Solids have a definite shape and volume because the particles in them are held together tightly.
Explanation:
Liquids have a definite volume but their particles aren't held together as tightly as solids, so liquids take on the shape of the container they are in. Gases have no definite shape OR volume they just float around because the particles in them are so loose they can take on the shape and volume of any container.
I NEED THIS ASAP
Give me 3 Facts about motion
Write them in complete sentences
Answer:
In physics, motion is the phenomenon in which an object changes its position over time.
There are 3 laws of motion also known as Newton's laws of motion.
The 3 laws are the law of inertia, law of momentum and 3rd law of motion.
please help me i need help right away!!!!
Answer:
Direct current is the flow of current through a current carrying conductor in the same direction from positive to negative ends. Alternating current is the type of current our mains have where the current is constantly changing direction at a certain rate
Explanation:
Direct current (DC) is a form of electricity that has a unidirectional flow, such that the current path in the current carrying conductor of a circuit is, at all times, in a specific single direction
Alternating Current (AC) is electricity continuously reverses its direction of flow and the magnitude of electricity at a given frequency with time. It is the of current found in electric supply cables that are found in our houses
Therefore, we have;
Direct current is the flow of current through a 1. current carrying conductor in the 2. same direction from positive to negative ends. Alternating current is the type of current our 3. mains have where the current is constantly 4. changing direction at a certain rate
10. WIMPS and MACHOS cannot be seen or felt.
True
False
Answer:
false I believe is the right answer
Answer:
True
Explanation:
. Determine the pressure due to water at the
bottom of a tank which is 25cm deep and is
four-fifths full of water,
(Density of water = 1000kgm',g=10ms”).
Explanation:
P= d*g*h
P=1000*10*0.25
P=2500 Pa
I have a circuit with a 200 V battery which produces 150 W of power. What is the
current in the circuit?
Explanation:
0.75
According to the formula, P=IV
150 = I×200
What’s velocity and acceleration
Answer:
velocity- the speed of something in a given direction.
Explanation:
acceleration- increase in the rate or speed of something.
A child pushes a toy truck 2.5 m across a floor with a constant force of 22 N. How much work does the child do on the toy truck?
22/2.5= 8.8 J
22 x 2.5= 55 W
22/2.5= 8.8 W
22 x 2.5= 55 J
Answer:
55j
Explanation:
work= force × distance
We have that When A child pushes a toy truck 2.5 m across a floor with a constant force of 22 N.The work done by the child on the toy truck
W= 55 Joules
22 x 2.5= 55 J
Option D
From the question we are told that
A child pushes a toy truck 2.5 m
A constant force of 22 N.
Generally the equation for the Workdone is mathematically given as
W=f*d
W=22N*2.5
W= 55 Joules
Therefore
When A child pushes a toy truck 2.5 m across a floor with a constant force of 22 N.The work done by the child on the toy truck
W= 55 Joules
22 x 2.5= 55 J
Option D
For more information on this visit
https://brainly.com/question/21811998
1pt A cannon fires a 5-kg ball horizontally from a
muzzle that is 1 m above the ground. The
velocity of the ball on leaving the cannon is 700
m/s. At the same time that the cannon is fired,
a soldier drops an identical ball straight down
from a height of 1 m. Neglecting friction and air
resistance, which statement is correct regarding
when the balls strike the ground?
Answer: Both cannonballs will hit the ground at the same time.
Explanation:
Suppose that a given object is on the air. The only force acting on the object (if we ignore air friction and such) will be the gravitational force.
then the acceleration equation is only on the vertical axis, and can be written as:
a(t) = -(9.8 m/s^2)
Now, to get the vertical velocity equation, we need to integrate over time.
v(t) = -(9.8 m/s^2)*t + v0
Where v0 is the initial velocity of the object in the vertical axis.
if the object is dropped (or it only has initial velocity on the horizontal axis) then v0 = 0m/s
and:
v(t) = -(9.8 m/s^2)*t
Now, if two objects are initially at the same height (both cannonballs start 1 m above the ground)
And both objects have the same vertical velocity, we can conclude that both objects will hit the ground at the same time.
You can notice that the fact that one ball is fired horizontally and the other is only dropped does not affect this, because we only analyze the vertical problem, not the horizontal one. (This is something useful to remember, we can separate the vertical and horizontal movement in these type of problems)
Which of the following statements about open clusters is true? Group of answer choices All stars in the cluster are approximately the same age. There is an approximately equal number of all types of stars in the cluster. All stars in the cluster are approximately the same color. All stars in the cluster have approximately the same mass. All stars in the cluster will evolve similarly.
Answer:
All stars in the cluster are approximately the same age.
Explanation:
An open cluster refers to a group of around a thousand stars such that these stars are surrounded by the nebula. All-stars in the cluster are approximately the same age. Milky Way consists of more than 1000 such open clusters.
Examples of an open star cluster areas follows:
1. Beehive
2. Hyades
3. Pleiades
To calculate the heat needed to warm a pot of water, what do you need to
know?
A. The mass and the amount of work done
B. The mass and the latent heat of vaporization
C. The mass, temperature change, and specific heat capacity
D. The mass and the latent heat of fusion
Answer:
C
Explanation:
Answer:
C
Explanation:
how easily a material stretches when force is applied
Answer:
translucent and transparent
True or False
further the sun, the longer the shadow
Answer: Yes the further the sun is away the longer the shadow is. At noon,the shadow is the shortest because its straight up above you. If this helps pls mark brainliest!
Answer:
Further the sun, the longer the shadow; true.
Which is a process that involves collecting information and ideas that are supported by belief or opinion?