Bob the American has just driven his car across the Canadian border when he sees a
speed limit sign of 85 kilometers/hour. His speedometer only shows his speed in
miles/hour. Convert the kilometers to miles so that Bob doesn't get a speeding ticket.
(Conversions: 1 mile = 5280 ft; 1 foot = 12 in.; 1 inch = 2.54 cm
Answer:
it equals 53 miles per hour
A car has steady speed of 8m/s .How long does the car take to travel 160m
Answer:
the time taken by the car to travel 160 m = 160/8= 20 s
Hope it helps!!!!!!
Thank you
a body is moving with uniform velocity of 15 m/s calculate its velocity after it travels 100m in 20 second
Since the body is moving with uniform velocity, its velocity after it travels 100 m in 20 s is 15 m/s.
Hope it helps! Please do comment
Venus
Mars
It has no atmosphere due
to weak gravity.
Europa
It is too hot for liquid
water to exist.
--
Earth's moon
1
1
1
It is too cold for liquid
water to exist on the
surface.
?
Scientists believe it used
to have flowing liquid
water.
SUBMIT
Answer:
Earth is the only known planet to have bodies of liquid water on its surface. Europa is thought to have subsurface liquid water. ... Evidence points to water on other planets in our solar system. In 2015, NASA confirmed that liquid water flows intermittently on present-day Mars
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If the speed of light is 3.0*10(8) m/s, and the moon is 404,927 km away, how long would it take a radio signal to go from earth to the moon and back again
Answer:
Explanation:
formula
t = d/r
d = 404927 km or 404927000 meters
r = 3 * 10^8 m/s
t = 404927000 / 3 * 10^8
t =1.35 seconds.
That's one way. To get it to go all the way and back multiply by 2
t = 2 * 1.35
t = 2.70 seconds
Compare and contrast scientific inquiry "skill and process".
Answer:
The inquiry process takes advantage of the natural human desire to make sense of the world... This attitude of curiosity permeates the inquiry process and is the fuel that allows it to continue. Process skills are not used for their own sake.
If a person walks forwards five meters but then moves back one meter,
what is their displacement?
Answer:
4
Explanation:
because when u have 5 then take 1 away u have 4
what's is meant by relative motion?
Relative motion means a motion relative to a reference point. We can also say, relative motion means motion referred or observed from a reference point.
For example, Alex is in a train and Ace is at the station, when the train starts moving, for Ace it is moving at a speed of 10 m/s, but for Alex it is moving at 0 m/s, or we can say that it is at rest for Alex, but in motion for Ace. This is relative motion.
Answer:
relative motion is the motion of an object compared to that of another object.for example two cars driving in the same highway in the same direction.
I hope this helps
Schrodinger's cloud model for electrons is an alternate theory to Bohr's orbit model. True or False
Answer:
it's true...
Explanation:
hope it helps you
in the accompanying,circuit a battery with an emf of 24 v is connected in series to resistor x and two identical light bulbs connected in parallel.each light bulb is Marked 6 V and 3 w .will the ammeter reading increase or decrease if another identical light bulb is connected in parallel to the existing two and another resistor is connected in series with x? explain your answers
Answer:
Explanation:
When you put another light bulb in parallel with the other two, you are not going to get something for nothing. The current drain on the battery has to go up.
Let the lightbulbs have a a resistance of r. Two light bulbs with make the resistance go to 1/2 r. The lower the resistance, the more the current. When you put the third light bulb in, the resistance will go to 1/3 r. So the current goes up.
If you put another resistor in series with x, the resistance adds. The total series resistance is 2x. The current reading will go down. The higher the resistance the lower the current.
Why is the sun considerad as the main source of energy?
Answer:
The sun is considered as the main source of energy since it is the source of nearly all the earth's energy. Plants produce food using sunlight, and the food we get from plants and animals also has its primary sunlight source.
Hoped it helps you.
Answer:
It is because it supplies most of our energy that we use today, directly or indirectly. It radiates light and heat or solar energy, which makes it possible to exist life on earth.
how do i solve this?
Answer:
hmmm i dont know....
Explanation:
i just wanted free point. TANKS YOU SIR!!
An ambulance is currently traveling at 15m/s, and is accelerating with a constant acceleration of 5 m/s^2. The ambulance is attempting to pass a car that is moving at a constant velocity of 30m/s. How far must the ambulance travel until it matches the car’s velocity?
Using 3rd equation of kinematics
[tex]\\ \rm\longmapsto v^2-u^2=2as[/tex]
[tex]\\ \rm\longmapsto s=\dfrac{v^2-u^2}{2a}[/tex]
[tex]\\ \rm\longmapsto s=\dfrac{30^2-15^2}{2(5)}[/tex]
[tex]\\ \rm\longmapsto s=\dfrac{900-225}{10}[/tex]
[tex]\\ \rm\longmapsto s=\dfrac{675}{10}[/tex]
[tex]\\ \rm\longmapsto s=67.5m[/tex]
when a burning stick of increase is moved fast in a circle a circle of red light is seen.
Answer:
The impression of the image on the retina lasts for about 1/16th of a second after the removal of the object. If a burning stick of incense is revolved at a rate of more than sixteen revolutions per second, we see a circle of red light due to persistence of vision.
Explanation:
One astronomical unit (AU) is about 1.5 x 108 km. Explain why this is the same as 150 x 100 km.
Answer:
To change 150x106 km to scientific notation, the leading number must be reduced to a
number between 1 and 9.99999.... To do this, one must dDIVIDE by 100, yielding 1.50.
In order to keep the entire quantity the same, one must then MULTIPLY the exponential
part of the number of 100. This is equivalent to increasing the exponent from 6 to 8.
Explanation:
hope this helps
Fun Fact: A cow-bison hybrid is called a “beefalo”
The quantity of matter inside the body is?
Answer:
mass is the quantity of matter inside the body
Answer:
The mass of a body is the quality of matter it contains
Explain ALL THREE of Newton’s Laws in your own words.
Explanation:
(1) Every object moves in a straight line unless acted upon by a force. (2) The acceleration of an object is directly proportional to the net force exerted and inversely proportional to the object's mass. (3) For every action, there is an equal and opposite reaction.
Which characteristic accounts for the fact that red lights in dark rooms and DO NOT expose negatives during developing?
Answer:
the long wavelength and not focused on the negatives.
what do you consider to be your primary loving relationship?
Answer:
I do not own this picture inserted below. Credits to the rightful owner. But i hope this help you <3
Given the graph below, the resistance of the wire in Ohms is:
a 0.25
b 4
c 3.75
d 0
Answer:
C . 3.75 Ohms
Explanation:
V = IR
R = V / I
From the graph, you pick a value for potential difference and find its corresponding current.
The resistance of the wire in Ohms is 3.75 Ω, therefore the correct answer is option C
What is resistance?Resistance is the obstruction of electrons in an electrically conducting material.
The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.
V=IR
where V is the voltage
I is the current
From the voltage-current graph, one can know the resistance by calculating the slope of the graph
As shown in the graph the variation of the voltage with the current
Y axis represents the voltage and the X axis represents the current
slope = variation in the Y coordinate /variation in the X coordinate
resistance = variation in the voltage /variation in the current
= (30 - 0 )/ (8-0 )
= 3.75 Ω
Thus, by observation and calculation from the graph, the resistance of the wire comes out to be 3.75 Ω
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en and Karen are travelling for the weekend. They both leave from Jen's house and meet at their destination 250 miles away. Jen drives 45mph the whole way. Karen drives 60mph but leaves a half hour after Jen. How long does it take for Karen to catch up with Jen
Answer:
1 1/2 hours. for Karen to catch Jen.
Explanation:
Karen needs to make up 22.5 km which is the distance Jen travels in 1/2 hour.
The distance where they meet must be equal from the starting point.
Jen
Jen is out 1/2 hour longer.
Let the Karen's time = t
d = r * t
d = 45 * (t + 1/2 hour)
Karen
d = 60 * t
The distances are equal
so
Meeting time
45*(t + 1/2 hour) = 60 * t
45t + 22.5 = 60t Subtract 45t from both sides
22.5 = 15t Divide by 15
t = 22.5 / 15
t = 1 1/2 hours = 1.5 hours.
Now you have to interpret the results.
Remember that Jen has travelled 1/2 hour more than Karen
Her time is 2 hours.
Karen's time is 1.5 hours.
Jen travels 2 hours which is 2 * 45 = 90 miles
Karen travels 1 1/2 hours which is 1.5 * 60 = 90 miles
why knowledge of measurement is important for everyone.
Here are some basic SI units .
Temp-Kelvin(K)Mass-KgDistance=meter(m)Force-Newton(N)A carver begins work on a block of granite that has volume of 1000 cm3 and a density of 5 g/cm3. What is the mass of the block of granite?
Answer:
D (density) = M (mass) / V (volume)
M = D * V = 5 g / cm^3 * 1000 cm^3 = 5000 g
The mass of the block of granite is 5000 grams.
We know that density is defined as mass divided by volume. So, we can write the following equation:
Density = Mass / Volume
We are given that the density of the granite is 5 g/cm³ and the volume is 1000 cm³.
We can plug these values into the equation to solve for the mass:
5 g/cm³ = Mass / 1000 cm³
Mass = (5 g/cm³)(1000 cm³)
Mass = 5000 grams
1 cm³ of granite has a mass of 5 grams. So, a block of granite with a volume of 1000 cm³ will have a mass of 5000 grams.
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iii A load of 2.5 N is hung on the spring.
1. What does the letter N stand for?
[1]
2. Use the graph to estimate the overall length in mm of the spring when 2.5 N is hanging from it. [2]
[Cambridge IGCSE Physics 0625/22 Question 2, October/November, 2010)
how many moles are there in 18 grams of water
Answer:
1 Mole
Explanation:
The molecular weight of H2O is 18grams/mole. The conversion from grams to moles looks something like this:
18grams H2O (1moleH2O/18grams H2O) = 1 mole
standard atmospheric pressure define
Answer:
The atmosphere exerts pressure of about 10 power 5 and Nm power-2 or 760 mm of HG at sea level is known as standard atmospheric pressure
Answer:
(atm) unit of measurement equal to air pressure at sea level, about 14.7 pounds per square inch. Also called standard atmospheric pressure. atmospheric pressure. Noun. force per unit area exerted by the mass of the atmosphere as gravity pulls it to Earth.
A stone is dropped from the top of the tower at height h. After 1 second another stone is dropped from balcony 20m below the top.Both reach ground at same time. What us the value of h.
A wombat runs south in a straight line with an average velocity of 5 m/s for 4
minutes and then with an average velocity of 4 m/s for 3 minutes in the same
direction.
What is the wombats total displacement?
What is the average velocity during that time?
We have that
The wombats total displacement is
[tex]d_t=2100m[/tex]
The average velocity during that time is
[tex]v_{avg}=5m/s[/tex]
From the question we are told that:
initial Velocity [tex]V_1=5m/s[/tex]
initial Time [tex]T_1=4min=>240sec[/tex]
Final Velocity [tex]V_2=4m/s[/tex]
Final time [tex]T_2=3min=>180sec[/tex]
a)
Generally, the equation for displacement is mathematically given by
d_t=(Initial +final) displacement
Where
initial displacement
[tex]d_1=V_1*t_1\\\\d_1=5*240[/tex]
[tex]d_1=1200m[/tex]
Final displacement
[tex]d_2=V_2*t_2\\\\d_2=5*180[/tex]
[tex]d_2=900m[/tex]
Therefore
[tex]d_t=(Initial +final) displacement[/tex]
[tex]d_t=1200+900[/tex]
[tex]d_t=2100m[/tex]
b)
Generally, the equation for Average velocity is mathematically given by
[tex]v_{avg}=\frac{d_t}{t_1+t_2}[/tex]
[tex]v_{avg}=\frac{2100m}{240+180}[/tex]
[tex]v_{avg}=5m/s[/tex]
in conclusion
The wombats total displacement is
[tex]d_t=2100m[/tex]
The average velocity during that time is
[tex]v_{avg}=5m/s[/tex]
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what is the acceleration of a car that goes from 4m/s to 8m/s in 2s use the guess method
Answer:
12m/3s is the answer I hope its right...'You perform an experiment to determine how the type of lightbulbs used in your
house (incandescent, LED, fluorescent) affects your electric bill.
What is the dependent variable?
A.) The type of lightbulb used
B.) Your electric bill
C.) The size of your house
D.) The number of bulbs in your house
