Answer: 298800 metres
Explanation:
Given that:
speed of polar bear = 8.3 m/s
Distance traveled = ?
Time taken = 10.0 hours
Since the SI unit of time is seconds, convert time in hours to seconds
1 hour = 60 minutes & 1 minute = 60 sec
So, 10.0 hours = (10 x 60 x 60)
= 36000 seconds
Apply the formula:
speed = distance traveled / time taken
8.3 m/s = distance traveled / 36000 seconds
Distance traveled = 8.3m/s x 36000 sec
= 298800 metres
Thus, the polar bear traveled 298800 metres.
10. A car starts from rest at a stop light and reaches 20 m/s in 3.5
s. Determine the acceleration of the car.
a) 2.2m/s2
b) 7.0m/s2
c) 5.7m/s2
d) 70m/s2
What electromagnetic waves are used in these applications?
Diagnosing illnesses:
Warming and cooking food:
Transmitting data from remote controls to televisions:
options are infrared waves
microwaves
radio waves
The correct electromagnetic waves for the given applications are Diagnosing illnesses: Infrared waves, Warming and cooking food: Microwaves and Transmitting data from remote controls to televisions: Infrared waves
Let's elaborate on each application:
1. Diagnosing illnesses: Infrared thermography, also known as thermal imaging, uses infrared waves to create an image of the body's heat distribution. This can reveal areas of increased heat, which may be indicative of inflammation, infection, or other conditions. Infrared waves are a part of the electromagnetic spectrum with wavelengths longer than visible light and can penetrate the skin to some extent, making them suitable for this application.
2. Warming and cooking food: Microwaves are a form of non-ionizing electromagnetic radiation with wavelengths longer than those of infrared waves but shorter than radio waves. Microwave ovens use these waves to agitate water molecules in food, causing them to vibrate and generate heat, which cooks or warms the food. The frequency used in microwave ovens is specifically chosen to resonate with water molecules, making it efficient for heating.
3. Transmitting data from remote controls to televisions: Infrared waves are used for short-range communication between devices like remote controls and televisions. The remote emits a beam of infrared light that is modulated to carry information, such as the command to change the channel or adjust the volume. The television's infrared receiver detects these signals and processes them accordingly. Infrared is chosen for this application because it is simple, reliable, and does not interfere with other electronic devices.
NEED HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
do you think the sea-surface temperatures are warmer or cooler due to the melting water?
Answer:
warmer
Explanation:
I really think it just gets hot
Answer:
It would be cooler I believe
Explanation:
A popular and dangerous circus act is the human cannonball, in which a person is shot from a cannon. Suppose the cannon has a barrel that is 3.05 m long and 16700 J of work done to accelerate the acrobat. What is the force exerted by the cannon on the acrobat?
The force of about 5.47 kN will be exerted on the acrobat by the cannon.
Explanation:
If work is done on the system which is acrobat for the present case, then the ratio of work done to the distance of the contact force medium can give us the force exerted on the acrobat or system.
As here the cannon is the source of force and it has a barrel of 3.05 m that means the cannon ball should travel the distance of 3.05 m to reach the acrobat and it has done a work of about 16700 J to accelerate the cannon ball. So as per Newton's third law of motion, the force gained by the cannon ball due to the work done on it will be equal to the force exerted on the acrobat by the cannon.
Thus, as work done is the product of force with displacement. Here the force experienced by the cannon ball will be the ratio of work done to the distance covered by the cannon ball.
[tex]Force = \frac{Work done }{Distance} = \frac{16700}{3.05} = 5,475 N.[/tex]
So, the force experienced by the cannon ball is 5.47 kN and the same force will be exerted on the acrobat.
Thus, the force of about 5.47 kN will be exerted on the acrobat by the cannon.
Final answer:
To find the force exerted by the cannon on the acrobat, use the formula Work = Force × Distance. Substitute the given values and calculate the force to be 5475.41 Newtons.
Explanation:
Force exerted by the cannon on the acrobat:
To calculate the force exerted by the cannon on the acrobat, we use the formula Work = Force × Distance. Given that 16700 J of work is done to accelerate the acrobat over a distance of 3.05 m, we can find the force by dividing the work by the distance: Force = Work / Distance.
Substitute the values:
Work = 16700 JDistance = 3.05 mCalculate the force:
Force = 16700 J / 3.05 m = 5475.41 N
Therefore, the force exerted by the cannon on the acrobat is 5475.41 Newtons.
Which is a property of ionic compounds?
O soft and brittle
O low boiling point
O able to conduct electricity
o low melting point
Answer: able to conduct electricity
Explanation: refer to pic
Click on the image. A science student wants to make an electromagnet using a copper wire wrapped around an iron bar, as shown in the image. What should the student do next?
- a. Connect the wire to a bulb
- b. Heat the wire around the bar
- c. Send a current through the wire
- d. Touch the ends of the wire together
The student will send a current through the wire after the wrapping of the copper wire. Option A is correct.
What is electromagnet?An electromagnet is a magnet whose magnetic field is generated by an electric current. Wire coiled into a coil is used to make electromagnets.
A current flowing through the wire produces a magnetic field that is focused in the hole, which serves as the coil's co
The Student wants to make an electromagnet using a copper wire wrapped around an iron bar. The student will send a current through the wire after the wrapping of the copper wire.
Hence option A is correct.
To learn more about the electromagnets refers to the link:
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The giant 1,000 ft. diameter radio telescope was used to determine Mercury's period of?
Revolution
Daylight
Rotation
Turning
Answer:
revolution
Explanation:
It is revolution because a telescope is used to see revolution!!!!☺☺☺☺Enjoy and bye!!!
Answer:
its actually rotation
Explanation:
Ingrid is moving a box from the ground into the back of a truck. She uses 20 N of force to move the box 5 meters. If she uses an inclined plane to reduce her force to 10 N which of the following statements will be true?
A. She will decrease the amount of work done.
B. She will make her work efficiency 100 percent.
C. She will increase the distance the box moves.
D. All of the above.
I think the right answer is of option A.
Explanation:
Inclined plane multiplies the applied effort.So,the force applied become less.
Hope it will help u...:)
Which parts of the graph would increase if all of earth's polar ice melts? Which part would decrease?
Answer:
the answer to the question is the part that is reflected by clouds and atmosphere 26%
If all of Earth's polar ice melts, the global sea level and average global temperature would increase, while the area covered by ice in the polar regions would decrease.
Explanation:If all of Earth's polar ice melts, several parts of the graph would increase. One part that would increase is the global sea level. As the ice melts, the water would contribute to higher sea levels. Another part that would increase is the average global temperature. The melting ice would release more greenhouse gases, which would further contribute to global warming. Hurricanes and extreme weather events would also increase in frequency and intensity.
On the other hand, the part of the graph that would decrease is the area covered by ice in the polar regions. With the melting of the polar ice, the ice extent would significantly shrink, leading to decreased ice coverage over the Arctic and Antarctic regions.
Learn more about Effects of melting polar ice here:https://brainly.com/question/32019012
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A 5.0 kg object moving at 5.0 m/s. KE = mv2 times 1/2
Answer: KE = 62.5J
Explanation:
Given that
Mass of object = 5kg
kinetic energy KE = ?
velocity of object = 5m/s
Since kinetic energy is the energy possessed by a moving object, and it depends on the mass (m) of the object and the velocity (v) by which it moves. Therefore, the object has kinetic energy.
i.e K.E = 1/2mv^2
KE = 1/2 x 5kg x (5m/s)^2
KE = 0.5 x 5 x 25
KE = 62.5J
Thus, the object has 62.5 joules of kinetic energy.
MATHPHYS PLEASE HELP IT SAYS ITS WRONG
Answer:
0.833 J
Explanation:
The initial kinetic energy of the spike is:
KE = ½ mv²
KE = ½ (0.52 kg) (3.7 m/s)²
KE = 3.56 J
23.4% of this energy is converted to internal energy.
U = 0.234 (3.56 J)
U = 0.833 J
I this example: Convection, Radiation, or Conduction
The kitchen gets warm when someone uses the oven.
Convection
becuse thats what the oven uses
Answer: Radiation
Explanation:
Radiation is like for example the sun gives out the radiation from it's heat and for the example you have the heat from the stove is warming the house up from it's radiation waves.
What do waves transfer from place to place?
a) motion
b) energy
c) matter
d) water
Answer:
motion transfer from place to place
10. Which of the following is one of the Four Elementary Forces? *
A. Tension
B. Vector
C. Newton
D. Gravity
Answer:
D
Explanation:
D is the only answer that makes sense as tension is the state of being stretched tight, vector is a quantity having direction as well as magnitude, and Newton is a person.
15. Brandon weighs 600 newtons. What is his mass? *
A. 0.0163 kg
B.9.8 kg
C.61.2 kg
D. 2940 kg
Final answer:
To calculate Brandon's mass with a weight of 600 newtons, we use the weight formula W = mg, where g is the gravitational acceleration (9.8 m/s²). Dividing the weight by g gives a mass of 61.2 kilograms.
Explanation:
The question asks to find Brandon's mass given that he weighs 600 newtons. To find the mass, we use the formula of weight which is the product of mass (m) and the acceleration due to gravity (g), stated as W = mg. Since the acceleration due to gravity is approximately 9.8 m/s² on Earth, we can rearrange the formula to solve for mass: m = W/g. Plugging in the known values we get m = 600 N / 9.8 m/s², which gives us approximately 61.2 kg.
Therefore, the correct answer is C. 61.2 kg.
Match each form of energy with its description.
Answer:
Fruit hanging is gravitational potential ( not moving making it potential and in the air so gravitational)
A box moving is kinetic (moving in the direction of the force mean kinetic)
The sand feeling warm is thermal (thermal means heat)
The lightning is electrical (self explanatory)
Radio waves is the last one I can’t see what it say
What is the current through a 75 W lightbulb when it is connected to a standard (110 V) line?
Explanation:
P = IV
75 W = I (110 V)
I = 0.68 A
A diver steps off a diving platform. How fast will she be moving when she
reaches the water 10.0 m below?
A. 7.00 m/s
B. 9.90 m/s
c. 14.0 m/s
D. 196 m/s
Answer:
C. 14.0 m/s
Explanation:
[tex]v_0=0\\a=g=9.9.8\\h=10\\v_f=?[/tex]
[tex]v_f^2=v_0^2+2a \Delta h\\v_f=\sqrt{v_0^2+2a \Delta h}\\v_f=\sqrt{0+2(9.8)(10)}\\v_f=\sqrt{196}\\v_f=14[/tex]
The standard wave format for any wave is
a a transverse
b a longitudinal
c an electromagnetic
wave. When depicting
a a transverse
b a longitudinal
c an electromagnetic
wave in standard wave
format, the direction of motion must be rotated by 90 degrees. Only one of two waves is shown at a time when placing
a a transverse
b a longitudinal
c an electromagnetic
wave in standard wave format
The standard wave format for any wave is transverse wave. When depicting longitudinal wave in standard wave format, the direction of motion must be rotated by 90 degrees. Only one of two waves is shown at a time when placing an electromagnetic wave in standard wave format.
Answer:
Transverse wave and Longitudinal wave and Electromagnetic wave
Explanation:
A child squeezes a pillow over his ears during a thunderstorm. Which wave
interaction helps decrease the sound of the thunder?
A. Reflection
B. Destructive interference
C.Constructiveinterference
D. Absorption
In the diagram below, the planets' relative distances from the Sun are shown. The sizes of the planets are not drawn to scale.
Jupiter
Uranus
Mercury Earth
Sun
Venus Mars
0
Saturn
Neptune
Which of the following planets most likely has the coldest surface temperature?
A. Venus
B. Mars
C.
Saturn
D. Mercury
Final answer:
Saturn, being one of the outer planets far from the Sun, has much colder surface temperatures compared to the inner planets like Venus, Mars, and Mercury, making it the most likely to have the coldest surface temperature among the options provided.
Explanation:
The planet most likely to have the coldest surface temperature among the options provided (Venus, Mars, Saturn, Mercury) is Saturn. Surface temperatures on planets decrease with increasing distance from the Sun because the planets are heated by the Sun's radiant energy, which diminishes with the square of the distance. Saturn, being far from the Sun, has much colder temperatures compared to the inner planets.
Furthermore, planets like Jupiter, Saturn, Uranus, and Neptune are giant gas planets with substantial distances from the Sun, leading to much lower surface temperatures. Given Saturn's greater distance from the Sun compared to Venus, Mars, and Mercury, it is the planet most likely to have the coldest surface temperature among the options.
Based on the given options, Mars is the planet most likely to have the coldest surface temperature.
To determine which planet most likely has the coldest surface temperature based on the given diagram and options provided, we can consider the distance of each planet from the Sun and its effect on surface temperature:
1. **Mercury**: Being closest to the Sun does not necessarily mean it has the hottest surface temperature. Despite its proximity, Mercury has extreme temperature variations due to its lack of atmosphere to retain heat.
2. **Venus**: While Venus is closer to the Sun than Earth, it has a thick atmosphere that traps heat, resulting in a very high surface temperature making it one of the hottest planets in our solar system.
3. **Mars**: Mars is farther from the Sun than Earth and has a thin atmosphere, which leads to colder surface temperatures compared to Venus and Earth. It experiences colder conditions due to its distance and atmospheric composition.
4. **Saturn**: Saturn is a gas giant planet, and its distance from the Sun results in very cold temperatures in its upper atmosphere. However, the question specifically asks about the surface temperature, and gas giants like Saturn do not have a solid surface to measure a surface temperature.
Based on the given options, **Mars** is the planet most likely to have the coldest surface temperature. It is farther from the Sun than Venus and has conditions more conducive to lower temperatures compared to the other listed planets.
The diagram shows monochromatic light passing through two openings.
What do the areas labeled X and Y represent?
constructive interference in which waves cancel each other out
constructive interference in which waves strengthen each other
destructive interference in which waves cancel each other out
destructive interference in which waves strengthen each other
Answer: constructive interference in which waves strengthen each other
Explanation:
Answer:
destructive interference in which waves cancel each other out
Explanation:
right on edge
if you put something like a piece of cardboard between a magnet and an iron nail the magnets to hold the nail in place even though the magnet is not touching the nail explain how that happens
Answer:
Explanation:
Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter. Magnets are attracted to and repel other magnets.
Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter. Magnets are attracted to and repel other magnets.
What is Magnetic force?One of the four fundamental forces of nature, the electromagnetic force, results in the magnetic force, which is brought about by the motion of charges.
When two charge-containing objects move in the same direction, a magnetic attraction pulls them together. Similar to this, there is a repulsive force between charged objects travelling in opposing directions.
We discovered how moving charge envelops itself with a magnetic field in our essay on magnetic fields. The magnetic force in this sense is a force that results from interacting magnetic fields.
Therefore, Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter. Magnets are attracted to and repel other magnets.
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Identify the characteristics of protists. Check all that apply.
Answer:
There are no examples
Explanation:
Answer:
these are the examples, then , u have to pick which ones are animal-like protists.
stationary
able to move using specialized structures
typically autotrophs
unicellular
Explanation:
A 2200 kg car doubles its speed from 50 km/hr to 100 km/hr. By how many times does the kinetic energy from the car’s forward motion increase?
Answer: 4
Explanation:
Given that:
Mass of car M = 2200 kg
Initial speed Vi = 50 km/hr
Final speed Vf = 100 km/hr
Kinetic energy is the energy possessed by a moving object. It is measured in joules, and depends on the mass (m) of the object and the speed (v) by which it moves
i.e K.E = 1/2MV^2
So, when traveling at 50 km/h
KE = 1/2x 2200kg x (50km/h)^2
KE = 0.5 x 2200 x 2500
KE1 = 2750000J
So, when traveling at 100 km/h
KE = 1/2x 2200 x (100 km/h)^2
KE = 0.5 x 2200 x 10000
KE2 = 11000000J
Thus, the number of times kinetic energy increases is obtained by dividing KE2 by KE1
i.e 11000000J / 2750000J
= 4
Thus, the kinetic energy from the car’s forward motion increase 4 times
Answer:4
Explanation:m=2200,u=50,v=100
The unit for speed is in m/s we have to conver to m/s
For ke1=50km/h to m/s 50×1000/3600=13.89
So keep=1/2mv^2
1/2(2200)13.89^2= 212225.31
Ke2=1/2mv^2=100×1000/3600=27.78
1/2mv^2= 1/2(2200)27.78^2
=848901.24 .....soke2/ke1 = 848901.24/212225.31=4
That d increase in ke
Sound is a form of ____ which produces a sensation of hearing in our ears
Sound waves are ______waves.
Answer:
energy and electromagnetic
Explanation:
What type of device is a coal-fired power plant?
Answer:
(Fossil fuel power station)
A type of power plant that uses fossil fuel to generate power.
A 9-volt battery is connected in series to two identical lightbulbs. The current in the circuit is 5 amps. What is the
power output of the battery?
watts
Answer:
45 Watts
Explanation:
I just got it right
Answer:
45 watts
Explanation:
right on edg. 2021
what are three processes in the body that are fueled by chemical potential energy?
Tom left for his friend's house. He drove 60 km in an hour. When he got to John's house, he wondered how fast he had been driving. What formula would he use to determine his speed?
Answer: Tom drove 60 km/hr fast
Speed = Distance traveled / time taken
Explanation:
Given that:
Distance traveled by Tom = 60 km
Time taken by Tom = 1 hour
Speed = ?
Since speed is obtained by dividing distance traveled by the time taken, hence the formula to use is as follows:
speed = distance / time
Speed = 60 km / 1 hour
Speed = 60 km/hr
Thus, Tom had been driving 60 km/hr fast, using the formula "speed = distance / time"