Answer:
See the answer below
Explanation:
1. Speed is calculated as the ratio of distance and time. Hence, Jame's speed can be calculated as:
400/5 km/hr = 80 km/hr
The unit for the speed would be km/hr. This can also be converted to m/s:
80 km = 80,000 m
1 hr = 3,600 s
80 km/hr = 80,000/3600 m/s = 22.22 m/s
2. Since James drove 400 km in 5 hours, the distance he drove is 400 km.
3. The time it took for James to get there is 5 hours.
A teacher walks back and forth in front of the room during a lesson. He starts at one end of the desk and walk from the door to the window a distance of 4.0m in 5 s. Then he stops, turn around and walk 2.0 m back toward the door in 3 s. He stops here for 10 s and then walk 3 meters toward the door in 6 s. Deduce the average speed of the teacher over the entire 24 s interval?
Answer:
0.375 m/s
Explanation:
The average speed of an object or a body is given by:
total distance traveled/total time taken
In the case of the teacher who walked back and fort:
Total distance traveled = 4.0 + 2.0 + 3 = 9 meters
Total time taken= 24 s
Hence,
Average speed of the teacher = 9/24
= 0.375 m/s
3. When should we perform stretching in relation to exercise (before, after or during), and what type of stretching should we be performing?
There is some evidence that regular static stretching outside periods of exercise may increase power and speed, and reduce injury. The best time to stretch is when the muscles are warm and pliable. This could be during a yoga or pilates class, or just after exercising.
PLEASE HELP FAST!!!
WILL MARK BRAINLIEST!!!!
This is a Earth Science course 4.02
2. Mariner 4 and 9 and Viking 1 and 2 probes needed enhanced cameras and wireless communication equipment to take images of Mars's surface and send them back to Earth. According to the video, how did improving our technology lead to new discoveries about Mars?
3. Using internet resources, describe how advances in imaging and wireless communication for space exploration have led to changes in imaging devices and communication on Earth.
4. Mars Odyssey and Mars Express required spectrometric equipment that could analyze Mars's atmosphere and surface composition and temperatures. Using internet resources, describe some home or business technologies that use spectrometric equipment to analyze atmosphere or temperature.
5. Using internet resources, research one space probe described in the video. Describe its goals and justify its purpose by explaining how it helped advance our understanding of the universe.
Answer:
1.It improved by using the Mars survey probe, that took a portrait of the planet that helped us see the climate of Mars.
Explanation:
I watched the video.
Question: What is this? (look in image attached)
Answer:
C. all of the above.
Explanation:
up at the top it says solar power bank.
in the boxes below it says LED flashlight and solar energy.
it is all of the above.
If you know these plz help me out:)
Answer:
1. Attacking the person
2. Stress fractures
Explanation:
If this helps this is on my opinion and I need do my best to help you:)
In the middle of a thunderstorm, a lightning bolt flashes. It takes Roberto 5 seconds to
hear the thunder afterwards. How far is the source of lightning from Roberto? The temperature is 22° C.
Speed of sound at 22°C = ?
d = ?
You will be reported if you didn't answer properly
Answer:
v = 344.1 m / s
d = 1720.5 m
Explanation:
For this problem we must calculate the speed of sound in air at 22ºC
v = 331 RA (1+ T / 273)
we calculate
v = 331 RA (1 + 22/273)
v = 344.1 m / s
the speed of the wave is constant,
v = d / t
d = v t
we calculate
d = 344.1 5
d = 1720.5 m
In any ecosystem_______, are the point of entry for new energy
Answer:
The answer is Producer. Hope this helps!
Answer:
Producer
Explanation:
They keep the food chain stable... without producers there wouldnt be and animals. They are the key to the food chain.
a kid uses a slingshot to shoot a rock at a target. when the kid applies a net force of 8.68 N forward, the rock accelerates at a rate of 12.4 m/s^2 forward. What is the rocks mass?
Answer:
0.7kg
Explanation:
Given parameters:
Force on the rock = 8.68N
Acceleration = 12.4m/s²
Unknown:
Mass of the rock = ?
Solution:
From newton's second law of motion, the net force on a body is the product of mass and acceleration
Net force = mass x acceleration
Now insert the parameters and solve the problem;
8.68 = mass x 12.4
mass = [tex]\frac{8.68}{12.4}[/tex] = 0.7kg
4. A hiker leaves camp and using a compass walks 4 km East, 6 km South, 3 km East, 5 km North, 10 km West, 8 km North and 3 km South. What is his total displacement?
Answer:
Because the hiker walked directly west and then directly north the two legs of the hike forms a right triangle. Therefore we can use the Pythagorean Theorem to solve this problem.
c=5
The hiker is 5km from camp and should head in a generally south-east direction
Do you think scientists should continue to explore nuclear energy as a source of electricity? Explain your opinion and provide reasons. Include an opposing opinion about another energy source.
Answer:
See explanation
Explanation:
Nuclear energy refers to energy trapped in the nucleus of atoms. Nuclear energy holds the greatest promise for large scale electricity generation. For instance, the amount of energy released by a given mass of uranium is 2.5 million times the energy released by combustion of an equal mass of carbon.One gram of uranium produces the same energy as 1 ton of coal, 17000 cubic feet of natural gas, 5000 pounds of wood and 149 gallons of oil.
Nuclear energy does not pollute the atmosphere as fossil fuels do. However, the challenges of effective control of the nuclear reactor and disposal of radioactive waste still remain a serious concern.
However, exploitation of nuclear energy as a source of electricity remain expensive and it is not quite easy to set up a nuclear power plant. Not many countries can afford to pay for the services of experts who operate nuclear energy plants talk more of providing the required equipment.
4. If 1 car is going faster than another traveling in the same direction, can they have the same velocity? Why or why
not?
Help please 15 points ??? ASAP
Answer:
No, because objects have the same velocity only if they are moving at the same speed and in the same direction. Objects moving at different speeds, in different directions, or both have different velocities. The average velocity of an object moving in a constant direction is calculated with the formula: velocity = distance/time.
Explanation:
Look at my comment if you are still confused. I think this article will help with acceleration and velocity.
An orange of mass m falls into a wagon. Assume the orange experiences upward acceleration magnitude a
when it comes in contact with the wagon.
What is the correct expression for the normal force magnitude Fn exerted on the orange?
Answer:f^n=m(a+g)
Explanation:khan academy said
What happens when the force of friction is more than the force of a moving object?
The object will slow down.
The object will be unaffected.
The object will continue at the same speed.
The object will speed up.
Inertia is a force which brings all objects to a rest position. Fast-moving objects have more inertia than slow-moving objects. False - The speed of an object has no impact upon the amount of inertia that it has. Mostly True - Two objects of the same mass can weigh differently if they are located in different locations.
I don't know if this will help
Please help me What will happen to an object if it is put into motion in space? A It will stop eventually B It will continue to move until it is acted upon by an unbalanced force C It will speed up over time D It will slow down over time
I think your answer is b.
PLEASE HELP!
Picture 1: Draw the force diagram for Mı if there is
friction on the table.
Picture 1: Draw the force diagram for M4 if there is
friction on the table.
Answer:
When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall. (i) Name the force exerted ...
the diagram below shows different weights on the see-saw. Will the see-saw move?
Answer:
yes it will
Explanation:
As the net torque on the see-saw is not equal to zero, the see-saw in the given diagram will move.
What is torque?The force that can cause an object to rotate along an axis is measured as torque. In linear kinematics, force is what drives an object's acceleration. Similar to this, an angular acceleration is brought on by torque.
As a result, torque can be thought of as the rotational counterpart to force. Torque is referred to using a variety of terms, including moment and moment of force. The moment arm or lever arm is the measurement of the separation between the point of application of force and the axis of rotation.
The net torque on the see-saw = 3 N × 1.20m - 8 N × 0.50 m
= - 0.4 N-m.
As the net torque on the see-saw is not equal to zero, the see-saw move will move.
Learn more about torque here:
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Please answer science question!!!
Answer:
from the sea towards the land
Answer:
sea to land
Explanation:
because the tide is coming in
A bullet is fired from a rifle with an initial velocity of 300 m/s at an angle of 25 degrees from the horizontal.
1. Calculate the horizontal and vertical components of the velocity
2. Calculate the time spent in the air
3. Calculate the maximum height
4. Calculate the horizontal distance
Answer:
1. The horizontal component of the velocity is approximately 271.89 m/s
The vertical component of the velocity is approximately 126.79 m/s
2. The time the bullet spends in the air is approximately 25.85 seconds
3. The maximum height reached by the bullet is approximately 819.35 meters
4. The horizontal distance is approximately 7028.36 meters
Explanation:
The initial velocity of the bullet = 300 m/s
The angle at which the bullet was fired, θ = 25° from the horizontal
1. The horizontal component of the velocity vₓ = The component of the velocity in the x-direction
vₓ = v × cos(θ)
Substituting gives;
vₓ = 300 × cos(25°) ≈ 271.89 m/s
The vertical component of the velocity [tex]u_y[/tex] = The component of the velocity in the y-direction
[tex]v_y[/tex] = v × sin(θ)
Substituting gives;
[tex]u_y[/tex] = 300 × sin(25°) ≈ 126.79 m/s
2. The time the bullet takes to maximum height, t = 1/2 × The time the bullet spends in the air
The following is the relevant kinematic equation for the vertical motion of the bullet;
v = u - g × t
Where;
[tex]v_y[/tex] = The final velocity vertical velocity = (0 at maximum height)
[tex]u_y[/tex] = The initial vertical velocity ≈ 126.79 m/s
g = The acceleration due to gravity = 9.81 m/s²
t = The time in flight of the bullet
Substituting gives;
0 = 126.79 - 9.81 × t
t ≈ 126.79/9.81 ≈ 12.924 s
The time the bullet spends in the air = 2 × The time the bullet takes to maximum height
∴ The time the bullet spends in the air ≈ 2 × 12.924 ≈ 25.85
The time the bullet spends in the air ≈ 25.85 seconds
3. The maximum height reached is given from the following kinematic equation;
[tex]u_y[/tex]² = 2 × g × h
Where;
h = The maximum height reached by the bullet
∴ h = [tex]u_y[/tex]²/(2 × g)
h = 126.79²/(2 × 9.81) = 819.35
The maximum height reached by the bullet = h = 819.35 meters
4. The horizontal distance travelled by the bullet = Horizontal component of the velocity of the bullet × The time the bullet spends in the air
∴ The horizontal distance travelled by the bullet = 271.89 × 25.85 ≈ 7028.36
The horizontal distance travelled by the bullet ≈ 7028.36 meters.
The matter in this series of images is going through a change. Draw a conclusion about the type of change shown. Is it a physical change or chemical change?
Answer:
chemical change
Explanation:
(c) Why is the telescope adjusted for a distant object in a spectrometer
Answer:
The telescope is adjusted to receive parallel rays by turning it towards a distant object and adjusting the distance between the objective lens and the eyepiece to get a clear image on the cross wire.
The telescope is turned towards a far-off object, and the distance between the objective lens and the eyepiece is adjusted to produce a clear image on the cross wire.
What is telescope?A telescope is a tool for creating enlarged views of far-off things. The telescope is without a doubt the most significant research tool in astronomy. It offers a way to gather and examine radiation coming from astronomical objects, even those at the edge of the cosmos.
When Galileo used the telescope to investigate alien bodies in the early 17th century, he revolutionized astronomy.
Magnification tools had never been employed for this purpose before until that point. The distance between the objective lens and the eyepiece is adjusted to provide a crisp image on the cross wire as the telescope is pointed towards a distant object.
Learn more about telescope here:
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give me 1 example of complete inelastic collision
i hope it helped thanks
The amount of energy required to heat 0.5 kilograms of water until the temperature increases 12° C is about
A. 12 calories.
B. 60 calories.
C. 6,000 calories.
D. 12,000 calories.
Answer:
C. 6,000
Explanation:
. How much power is used to move a 5 kg mass 28 meters in 8 seconds?
Answer:
171.5Watts
Explanation:
Given parameters:
Mass = 5kg
Distance = 28m
Time = 8s
Unknown:
Power = ?
Solution:
Power is the rate at which work is done;
Power = [tex]\frac{work done }{time taken}[/tex]
Work done = force x distance = mg x d =
m is the mass
g is the acceleration due to gravity
d is the distance
Work done = 5 x 9.8 x 28 = 1372J
Power = [tex]\frac{1372}{8}[/tex] = 171.5Watts
1. What is the pull that all objects exert on each other?
2. What is a push or pull that acts on an object?
3. Can objects going in different directions at the same speed have the same velocity? Why or why not?
4. If 1 car is going faster than another traveling in the same direction, can they have the same velocity? Why or why
not?
5. Explain the last part of the 3rd Law, for every action there is...?
6. 1st Law- an object at rest will remain at rest unless...?
7. If 2 objects are exerting a force on each other and theydon't move, the forces must be...?
Answer:
Im pretty sure 1 is gravity, 2 is force
Explanation:
True or False
It takes much more force to blast a soft ball 50 meters than it does to hit a golf ball 50 meters.
Answer:
False
Explanation:
The softball is bigger, but it is lighter, which means it has a better chance of getting farther way faster with a lighter amount of force. On the other hand, the golfball is heavier, which would take more force to move it a certain distance.
Answer: false
Explanation:
• Defines what the “natural” states of motion are, either at rest and constant
velocity. In essence, the first law sets up the basis to define what accelerated
motion is, which we address with Newton’s 2nd law.
• Defines the type of coordinate systems so that Newton’s laws are valid. These
coordinate systems are called inertial reference frames.
A soccer ball is kicked at an angle of 40 degrees with an initial velocity of
14 m/s. What is the horizontal velocity in m/s? (Do not state units, and give
answers to the hundredths place.) *
Answer:
[tex]v_x=10.72\ m/s[/tex]
Explanation:
Projectile Motion
It's the type of motion that experiences an object launched near the Earth's surface and moves along a curved path exclusively under the action of gravity.
Being vo the initial speed of the object, and θ the initial launch angle, the two components of the velocity are given by:
[tex]v_x=v_o\cos\theta[/tex]
[tex]v_y=v_o\sin\theta-g.t[/tex]
The soccer ball is kicked at an angle of 40° with an initial speed of vo=14 m/s.
The horizontal component is:
[tex]v_x=14\cos 40^\circ[/tex]
Calculating:
[tex]v_x=14\cdot 0.766[/tex]
[tex]\mathbf{v_x=10.72\ m/s}[/tex]
Please help me with this question :(
I have a test soon and I want to be prepared..
Detailed solutions please!
(I’ll give you 25points)
Answer:
[tex]\boxed{\text{\sf \Large 50 N}}[/tex]
Explanation:
Sum of the vertical forces is zero
F₁ + F₂ - Z = 0
Z is negative since Z acts in the opposite direction from F₁ and F₂
30 + 20 - Z = 0
Z = 50
Two pieces of metal with exactly the same mass are placed on a surface in bright sunlight. The temperature of the 1st block increases
by 3°C while the temperature of the 2nd increases by 8°C. If the specific heat of the 2nd block is 0.24 J/g-K, what is the specific heat of
the 1st block?
A)
0.3 /g-K
B)
0.64 J/g-K
1.2 J/g-K
D)
1.56J/g-K
Answer:
The specific heat of the 1st block is B. 0.64 J/g-K
Explanation:
Answer:
B
Explanation:
it is the specific heat
Calculate the pressure exerted by mercury column of 76cm high at its bottom. Given that the density of mercury is 13600kg/m³ and g=9.8 m/s².
Answer:
P = 101292.8
Explanation:
Use
Pressure p = H D g
H = height ( in metric)
D = density ( in metric )
g = gravity
So
H = 76 cm = 0.76 m
D = 13600 kg/m3
And g = 9.8
P = HDg
= 0.76× 13600×9.8
= 101292.8 pascal
Or = 1.012928 × 10^5
Answer:
sudeep is correct hope it's help you have a great day ☺☺keep smiling be happy stay safe
which object has the most kinetic energy a truck going 100 miles per hour or a motorcycle going 100 miles per hour
Answer:
The truck
Explanation:
Kinetic energy is directly proportional to mass. Since the truck has more mass, it will have more energy.