Answer:
2.204x10^2 -2 = 0.02204 in scientific notation.
Which of Newton’s laws of motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and the same direction unless acted upon by an unbalanced force?(1 point)
According to Newton's First Law of Motion, a body at rest will continue to be at rest unless another force acts on it, and a body moving at a constant speed will continue to move in a straight path unless another force acts on it.
what is the Newton’s laws of Inertia?A body must be subject to an external force in order to accelerate (or decelerate) or alter its direction of motion. Net forces or imbalanced forces are other names for external forces.
Inertia is the quality that a body possesses that prevents it from moving when at rest or from speeding up or slowing down while in motion. The mass, or quantity of substance in a body, directly relates to inertia. A body has more inertia the more mass it possesses.
what is Second Law of Motion ?According to the Second Law of Motion, if an imbalanced force applies on a body, the body will accelerate (or decelerate), changing its speed. It is possible to state that a body at rest is thought to have zero speed ( a constant speed). Therefore, an imbalanced force is any force that causes a body to move. Additionally, an imbalanced force is any force that causes a body to move slowly or quickly, such as gravity or friction. The formula below can be used to demonstrate this law.
F= ma
The imbalanced force is F.
The object's mass is m.
The force's acceleration, a, is measured.
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A cheetah 325 m North in 30 minutes. What was the cheetah's speed in km/hr?
Answer:
if 325 m ÷ 30
Explanation:
if 325 m ÷30 min then the answer would be 10.8 km /hour
Which event in the “The Medicine Bag” is most symbolic of Martin beginning to connect with his Sioux heritage?
Martin brings his friends home to meet Grandpa.
Martin chases the dogs away from Grandpa.
Martin finds a leather pouch around Grandpa’s neck.
Martin finds money in Grandpa’s boots.
Answer:
A- Martin brings his friends home to meet grandpa.
Explanation:
took the test.
Answer:
A
Explanation:
on edge :)
A cyclist, while overtaking another bike, increases his speed uniformly from 4.2 mis to 6.3 m/s over a time interval of 5.3 s. How far does the cyclist
travel while overtaling?
Answer:
27.82m
Explanation:
The distance of the cyclist can be calculated using the formula:
S = ut + 1/2 (at^2)
Where; S = distance
u = initial velocity
a = acceleration
t = time
However, to find acceleration, we use:
a = v - u/t, where v is the final velocity
According to this question, u = 4.2m/s, v = 6.3m/s, t = 5.3s
a = 6.3 - 4.2 / 5.3
a = 2.1/5.3
a = 0.396m/s^2
Hence, using S = ut + 1/2 (at^2)
S = (4.2 × 5.3) + 1/2 (0.396 × 5.3 × 5.3)
S = 22.26 + 5.56
S = 27.82
Therefore, the cyclist travel in 27.82m
A ferry is crossing a river. The ferry is
headed due north with a speed of 2.6 m/s
relative to the water and the river’s velocity
is 4.4 m/s to the east.
a) What is magnitude of the boat’s velocity relative to Earth?
Answer in units of m/s
b) Find the direction in which the ferry is
moving (measured from due east, with counterclockwise positive).
Answer in units of ◦
.
Answer:
a. 5.1 m/s b. 149.42°
Explanation:
a. Velocity of boat relative to earth, V = velocity of boat relative to river, V'+ velocity of river relative to earth, v.
We add these vectorially.
Since velocity of boat relative to river is 2.6 m/s due north and velocity of river relative to earth is 4.4 m/s due east, we apply Pythagoras' theorem and add them together since both velocities are perpendicular to each other.
So, V² = V'² + v² = (2.6 m/s)² + (4.4 m/s)² = 6.76 (m/s)² + 19.36 (m/s)² = 26.12 (m/s)²
V = √[26.12 (m/s)²]
V = 5.1 m/s
b. Since the relative velocities of the ferry relative to the water and the velocity of the river relative to the earth are the components of the velocity of the ferry relative to the earth, the y - component being the velocity of the ferry relative to the earth since it is due north, and the x- component being the velocity of the river relative to the earth since it is due east. So, we have that
tanФ = y - component/x - component = V'/v where Ф is the angle between V and the west direction.
tanФ = V'/v
tanФ = 2.6 m/s ÷ 4.4 m/s
tanФ = 0.5909
Ф = tan⁻¹(0.5909)
Ф = 30.58°
So, the angle measured from due east with counterclockwise direction positive is 180° - Ф = 180° - 30.58° = 149.42°
PLEASE HELP ME, IM STUCK ON THIS QUESTION
Answer:
the correxct adnswer is d
Explanation:
lol
Which is an example of static friction?
a. pulling a skier behind a boat
b. pushing a box that is at rest
c. braking a car going down a hill
d. driving a car up a hill
Answer:
static friction is developed between 2 surfaces in state of rest so i think answer is c.Even though the wheel is in motion, the patch of the tire in contact with the ground is stationary relative to the ground, so it is static rather than kinetic friction.
The static friction is the hindrance to an object which is trying to move from stationary state. Among the given options, the example for static friction is pushing the box that is at rest.
What is static friction?The friction that occurs when people attempt to move a stationary object on a surface without actually causing any relative motion between the body and the surface.
The static frictional force is self-regulating, which means that it will always be equivalent to and opposite to the force applied. Static friction is zero for an object at rest on a flat table.
Static friction creates an equal and opposite force that keeps the book at rest when you push horizontally with a small force.The static friction force increases to match the force as you push harder.
The maximum static friction force is eventually exceeded, and the book moves. Therefore, option B is correct.
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What role do electrons play in creating intermolecular forces?
The electrons repel positively charged molecules
Electron movement creates partial charges in different regions of molecules
They don't play any role
Electrons prevent dipole dipole interactions
Answer:
Electron movement creates partial charges in different regions of molecules.
Explanation:
The electrons play a role in the creation of London forces, which are intermolecular forces produced by the movement of the electrons in the atoms and molecules. The distribution of electrons will produce the formation of a temporary dipole, generating a partial charge in the atoms, which can induce a dipole into a subsequent atom (creating again partial charge), and so on.
Hence, the correct option is the second option: Electron movement creates partial charges in different regions of molecules.
I hope it helps you!
The role played by electrons in creating intermolecular forces is that electron movement creates partial charges in different regions of molecules.
Molecules are held together by intermolecular forces. There are several kinds of intermolecular forces such as;
Dipole - dipole interactionDispersion forcesHydrogen bonding etcIn all the kinds of intermolecular interactions mentioned above, interaction between molecules is made possible by movement of electrons which creates temporary or permanent dipoles in molecules due to partial charges in different regions of molecules.
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water come out more slowly from an upstairs tap from a similar downstairs
Answer:
As we know that liquid pressure is depend upon the depth of liquid where the downstair tap has more depth so water come out with more pressure wheres the upstairs tap has less depth so water come out with low pressure so
HELPPPPPPPPP PLEASEEEEEE On this graph, which material has the lowest density? Density comparison Question 4 options: red yellow green blue
Yellow has the lowest density. I took the test and got this question correct. :)
The object represented by the yellow graph has the lowest density.
What is density?
It is defined as the mass per unit volume of the body. Mathematically -
ρ = M/V
Given is a graph showing the variation of the mass with volume.
All of the given graphs are straight lines. The slope of the line determines the proportionality constant or density of the four objects whose graphs are plotted. The graph with the maximum slope will have the highest density and with the minimum slope has lowest density. It can be seen that the yellow graph has the smallest slope (slope is the angle any straight line makes with x - axis). So it will have the lowest density.
Therefore, the object represented by the yellow graph has the lowest density.
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if a dice is thrown at random find the probability of getting 4
Answer:
☆<《HOPE IT WILL HELP YOU 》>☆
Explanation:
The probability of getting 4 is 1
Answer:
1/6
Explanation:
There are 6 faces, and one of them is 4. Therefore the answer is 1/6.
If an object weighs 20 N and is sitting on the floor without moving, what must be the normal force of the floor acting on the box?
20 N up
20 N down
10 N up
10 N down
Answer:
20 N up
Explanation:
Since the object on the floor is sitting still. Based on Newton's law of force. Objects must have equal reaction and force against each other for still objects. So the answer is 20 N up. Since the force are equal on both sides making the object not moving.
PART II – CHOOSING THE APPROPRIATE UNIT For each example below choose the appropriate unit to measure each (mm, cm, m or km). 1. Width of physics book _____ 2. Distance from New York to Utah _____ 3. Length of fingernail _____ 4. Length of hallway _____ 5. Height of a mountain _____ 6. Length of a fork _____ 7. Distance between cities _____ 8. Width of your eyeball _____
Answer:
Explanation:
In this unit of measurement for distance or length, the units are arranged from the least to the largest unit i.e
mm < cm < m < km
Where mm is millimeter, cm is centimeter, m is meter and km is kilometer.
Hence, the appropriate unit to be used depends on how small or wide the length/distance being referred to is. For instance, the length of a stapler pin should be measured in millimeter while the length of a pen should be measured in centimeter. The appropriate measurement can be determined by determining the closest unit the value falls into. For instance, there is no need to refer to a length as 1000 cm when it can be referred to as 10 m (since 100 cm equals 1 m)
1. Width of a physics book should be measured in centimeters (this is similar to length of a pen).
2. Distance from New York to Utah should be measured in kilometers (Distance between far cities or states are measured in kilometers).
3. Length of a fingernail should be measured in millimeters (this is similar to the length of a stapler pin)
4. Length of hallway should be measured in meters (This is generally larger than centimeter but lesser than kilometer)
5. Height of a mountain should be measured in kilometers (This is usually a very long distance from the earth surface)
6. Length of a fork should be measured in centimeters (This is similar to the length of a pen).
7. Distance between cities should be measured in meters (except the distance is far apart, distance between close cities are measured in meters)
8. Width of the eyeball should be measured in millimeters (similar to the length of a stapler pin and fingernail).
an object has a mass of 14 grams and a density of 7 g/mL. When placed in water it sinks. What is the Volume of water displaced?
A 28g
B 14ml
C 98ml
D 2ml
Explanation:
D = M/V
We rearrange this equation to get V = M/D
So 14 g/7 g/mL,
the grams cancel out, and we're left with 2 mL.
D is the answer.
The volume of water displaced by the body is 2 ml.
What is volume of a body?Volume of a body is amount of space occupied by a body. As it has only magnitude (no direction), it is a scalar quantity. SI unit of volume is [tex]m^{3}[/tex].
Now, it is given that,
Mass of the object is 14 grams.
Density of the object is 7 g/ml.
So, volume of the object will be = (mass of the object)/(density of the object)
= 14 grams/(7 g/ml).
= 2 ml.
When the object is placed in water, it sinks. That's why, volume of water displaced by it is equal to the total volume of the body.
Hence, The volume of displaced water is 2 ml.
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) What is work? Write down the types of work.
Work
In physics work is said to be done when a force acting on a body displaces it through a certain distance. The work by a constant force is measured by the dot product of force will displacement.
i.e. W = F.S or W = F S cosq …(1)
where F = force and S = displacement
And q = angle between F and S.
Hope this helps! <3
Max and Jimmy continue jumping on a trampoline. When they jump at the same time, Max makes a wave crest and Jimmy makes a wave trough. What type of wave interaction occurred?
Answer:
The type of wave interaction occurred is destructive interference
Explanation:
Given that,
Max and Jimmy jump at same time.
Wave crest makes by Max and wave trough makes by Jimmy.
We need to find the type of wave interaction occurred
According to given data,
We know that,
If the wave crest and wave trough are interacted to each other then the interaction is destructive interference.
If the wave crest and wave trough are interacted with crest and trough then the interaction is constructive interference.
So, we can say that if the wave crest and wave trough are interacted to each other then the interaction is called destructive interference
Hence, The type of wave interaction occurred is destructive interference
Answer:
destructive interference
Explanation:
Please help it’s physics and I suck at this subject :(
it become easier to carry a load in a wheel barrow when the load is shift towards its wheel give reason
hi
how do you think some people are able to use the keyboard of a computer without looking at it ?
pls send the answer fast
Answer:
Because they memorized the keys
Or their just used to using a keyboard
Explanation:
you walk at a speed of 1.5 m/s and it takes you 1800 seconds to get to your friends house. if you follow the same route, how fast would you need to travel to get there un 600 seconds
Answer:
4 miles per hour
Explanation:
Your welcome
Plzzzzzzzz helppp me 10 pointsssssssssssssss!!
Question:
How is the shell of a hard-boiled egg similar to the Earth’s crust?
Question:
Besides an egg, provide your own example of some object you may know that could be seen as a model of the Earth’s crust.
PLZZ help and answer BOTH
When the velocity increases does the kinetic energy increase or decrease ?
Because the mass is constant, if the velocity is increased, the kinetic energy must also increase.
A dog is chasing a cat towards a tree. The cat has a 10-meter lead and runs at a speed of 6 meters per second. The dog runs at a speed of 8 meters per second. The tree is 30 meters away from the dog’s starting position. Which animal will reach the tree first
Answer:
mnnnnnbmbmmmmnnmmmmmmnnnnnnmmm.mm nooooo
Explanation:
awer some folom myy thans for dog
How much work is done on a cat that is pushed 50 meters with 3 N of force?
Answer:
150
Explanation:
work done = constant force x distance moved in the direction of force
W = F x S
(UNITS: J = N x m)
50 x 3 = 150
A 25.1 kg boy climbs to the top of a 11.08 m tall water slide at an amusement park. He carries a 2.94 kg rubber ball with him. Taking the bottom of the slide to be the zero point, what is the gravitational potential of just the boy in joules? (do not include units)
Answer:
3080
Explanation:
Potential energy is the energy stored or contained in a body as a result to its relative position to other objects, an example is an object that is placed at a height above the ground thereby experiencing gravitational energy.
Potential energy = mass × gravity × height
Given that: height = 11.08 m, gravity = 9.81 m/s² and mass = mass of boy + mass of ball = 25.1 + 2.94 = 28.34 kg
Potential energy =28.34 × 9.81 × 11.08 = 3080
need help this is timed
an object falls from a high building and hits the ground in 9.0 seconds.ignoeing air resistance,what is the distance that it fell?
Answer:
kinematic eq. d = Vi*t + 1/2a*[tex]t^{2}[/tex]
Explanation:
Vi=0
d=1/2 a*[tex]t^{2}[/tex]
d= 1/2(9.8)[tex]0.9^{2}[/tex]
d=3.969 m
The distance from which the object falls is 393.9 meters.
Given that, an object falls from a high building and hits the ground in 9.0 seconds and air resistance = 0
So the distance can be calculated by the formula given below.
[tex]s = vt + \dfrac{1}{2} at^2[/tex]
Where, [tex]s[/tex] is the distance in meters, [tex]t[/tex] is time (in seconds) taken by the object in motion, [tex]a[/tex] is the acceleration of the object in meter per second square and [tex]v[/tex] is the final velocity in meter per second.
In this case, object falls from high building to the ground so the final velocity would be zero. Gravitational acceleration is -9.8 meter per second square.
Substituting the values in the above formula,
[tex]s = (9.0\times0) + \dfrac{1}{2}(-9.8\times(9.0)^2)\\s = 0 + (-9.8\times81\times0.5)\\s = 396.9 \;\rm m[/tex]
The distance from which the object falls is 393.9 meters.
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PLEASE HELP!!!! As kinetic energy increases, what happens to mass and velocity?
Group of answer choices
only mass increases
only velocity increases
both increase
both decrease
Answer: I believe it would be "only velocity increases " because the mass is constant, if the velocity is increased, the kinetic energy must also increase.
Answer:
they both increase
Explanation:
kinetic energy is proportional to velocity squared. which mean if kinetic energy goes up the velocity goes up double as much and kinetic energy is exactly proportional to mass so as kinetic energy increases so does mass.
2. A flower pot falls from a balcony ledge to the sidewalk below. If the flower pot
falls a distance of 30m, find a) the time it takes to hit the sidewalk b) the velocity
when it hits the sidewalk
Answer:
a) 2.5s
b)24.2m/s
Explanation:
a) s = ut +1/2gt^2
Where u=0
Make t the subject and solve
b) v^2=u^2+2gs
Where u =0
Make v the subject and solve
What is the mass of a student who weighs 618 Newton?
Answer:
63.01 kg is the mass of the student whose weight is 618 Newton
Mass of student is 63 kilogram (Approx.)
Given that;
Weight of a student = 618 Newton
Find:
Mass of student
Computation:
We know that;
Gravitational acceleration g = 9.8 m/s²
So,
Mass = Weight / Gravitational acceleration
Mass of student = 618 / 9.8
Mass of student = 63.06
Mass of student = 63 kg (Approx.)
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