Answer:
2700
Explanation:
1m/s=3.6km/hr
You drive 200 miles in 3 hours before stopping for lunch and gas. After lunch you
travel 250 miles in an hour and a half What was your average speed in mi/hr)
for the trip
Given :
You drive 200 miles in 3 hours before stopping for lunch and gas. After lunch you travel 250 miles in an hour and a half.
To Find :
Average speed.
Solution :
We know, average speed is given by :
[tex]v=\dfrac{\text{Total distance covered}}{\text{Total time taken}}\\\\v=\dfrac{200+250}{3+1.5}\ miles/hr\\\\v=\dfrac{450}{4.5}\ miles/hr\\\\v=100\ miles/hr[/tex]
Therefore, average speed of the journey is 100 miles/hr.
Hence, this is the required solution.
Which represent correct variations of the formula for speed? Check all that apply. t = d/s s = d/t t = s/d s = dt d = st d = s/t
Answer: 1 2 5
Explanation:
Galileo Galilei, an Italian physicist, is credited with being the first to calculate speed by dividing it by the distance traveled and the time required. Galileo defined speed as the distance covered in a predetermined period of time. Thus option A, B. E is correct.
What represent correct variations of the formula for speed?Speed is determined by dividing the distance by the time. Calculating the units for speed requires knowledge of the units for both time and distance. Since the distance is measured in meters (m) and the time is measured in seconds, the units in this example will be meters per second (m/s) (s).
That is speed = distance time. Alternatively, you can calculate the time by dividing the distance traveled by the speed. You can figure out the third input if you know two of the inputs.
Therefore, For instance, if a car drives 120 miles (ca. 193 km) in 2 hours, we may calculate the speed as 120 × 2 = 60 miles per hour (ca. 97 km/h).
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what was Galleos contribution to the study of motion ?
Answer:
B ) He was the first to systematically study force and motion.
Explanation:
I seen this one before and know the answer since there's 4 options
What can you say about the motion of an object if its velocity time graph is a straight line parallel to the time axis
Explanation:
it means its velocity and acceleration is constant. And there is no change in displacement , so the object is not moving.
Can someone help me its A,B,C,D
As the earth rotates through one revolution, a person standing on the equator traces out a circular path whose radius is equal to the radius of the earth (6.38×10^6). What is the average speed of this person in meters per second? If we are standing in latitude 43° north what is our average speed?
Answer:
The average speed will be "1038 mph".
Explanation:
Period for one revolution is:
T = 24 hours
= 86,400 sec
x = c = 2πr
The given values is:
r = 6.38×10⁶ m
Now,
⇒ [tex]T=\frac{2 \pi r}{v}[/tex]
Or,
⇒ [tex]v=\frac{2 \pi r}{T}[/tex]
On substituting the values, we get
[tex]=\frac{2 \pi (6.38\times 10^6)}{86,400}[/tex]
[tex]=464 \ min/sec[/tex]
[tex]=(464 \frac{min}{sec}) (\frac{3600 \ sec}{1 \ hour} )(\frac{1 \ mi}{1609 \ m} )[/tex]
[tex]=1038 \ mph[/tex]
Someone please help me
Grandma has written up a new apple pie recipe with her crazy units again that you are trying to make. The recipe
calls for 6.25 x 10 cups of cinnamon How many teaspoons do you need?
Answer:
300x480 teaspoons
Explanation:
when converting cups to teaspoons just multiply by 48
Answer:
The answer should be 3tsp
Explanation:
3tsp
Answer to 1, 2, and 3 please
Answer:
1. 1000000
2. 1000
3. 1000000
Explanation:
If there not right. I'm sorry.
HELP ME PLZ!!!!! I'LL DO ANYTHING!!!!
A proton and a neutron are each close to a positive nucleus.
How does the charge on the nucleus affect the proton and the neutron, if at all?
A The neutron is attracted; the proton is repelled.
B The neutron is not affected; the proton is repelled.
C The proton is attracted; the neutron is repelled.
D The proton is not affected; the neutron is repelled.
Answer: b
Explanation:Because protons are positive and the nucleus is positive so it will be repelled and the neutron is neutral so it will be unaffected.
A bird flies 6km east, then 4km west. Find the total distance traveled and displacement (d) after this flight.
Given :
A bird flies 6 km east, then 4 km west.
To Find :
the total distance traveled and displacement after this flight.
Solution :
a)
We know , total distance is the amount of how much ground an object has covered .
Distance = 6+4 km = 10 km .
b )
Displacement is the shortest distance from one point to another .
Now , here the object first move 6 km east then moves 4 km west .
So , his distance from the starting position is :
Displacement = 6 - 4 km = 2 km .
Hence , this is the required solution .
Paul’s class investigated the effects of friction on the motion of a toy car. Using ramps with different surfaces, students determined the amount of time, in seconds (s), for the toy cars to reach the bottom of each ramp. All variables were controlled except the tested variable (independent variable). Paul's group concluded that toy cars on a sandpaper surface are fastest.
Answer:
C
Explanation:
..
Answer:The conclusion is valid for the data recorded
Explanation:
A toy car is given an initial velocity of 5.0 m/s and experiences a constant acceleration of 2.5 m/s2. What is the final velocity after 5.0 s?
a 21.6 m/s
b 19.2 m/s
c 17.5 m/s
d 24.5 m/s
Explanation:
v = u + at
v = 5 + 2.5 * 5
V ( final velocity after 5 sec) = 17.5 m/s
Question 11 (3 points)
1. How many amperes does a 125 watt bulb require when operating on 12 volts?
a. 0.096 watts
b. 10.41 Watts
С. 10.41 Ampere
D. 1500 ampere
Answer:
С. 10.41 Ampere
Explanation:
Given that,
Power, P = 125 watts
Voltage, V = 12 volts
We need to find current. Power in terms of current and voltage is given by :
P = VI, I = current
[tex]I=\dfrac{P}{V}\\\\I=\dfrac{125\ W}{12\ V}\\\\I=10.41\ A[/tex]
So, the current is 10.41 A.
Explain how your model is different from the model in the picture
What does your model look like and the one it's being compared to?
Answer:
you should prolly put the model
Explanation:
What is the potential energy of a 150 kg diver standing on a diving board that is 10 m high?
- Its for science
Answer:
the answer is 14,700
Explanation:
hope this helps :))
Answer:
14,700
Explanation:
were using the potential energy equation.
P.E- (150 kg) (9.8m/s2) (25 m) = 14,700
what weights include barbells and dumbbells
ons How many protons are in an atom of tin?
How many electrons are in an atom of tin?
How many neutrons are in an atom of tin? Round your
answer to the nearest whole number.
Answer:50,50,69
Explanation:I just did it
Urgent
Please write the complete answer
Multiply field strength (N/kg) by mass (kg) to get weight (N)
At the start, the car is carrying
4.7 kg * (9.8 N/kg) = 46.06 N
of fuel.
At the end, it is carrying
3.0 kg * (9.8 N/kg) = 29.4 N.
Assuming the car remains completely intact, its weight was reduced by
46.06 N - 29.4 N = 16.66 N.
HELP ME PLZ!!!!! I'LL DO ANYTHING!!!!
First find the diameter of each.
Jupiter’s diameter is 86,881 mi.
Earth’s diameter is 7,917.5 mi.
Then divide those two.
Rounded, Jupiter is 11 times larger.
unrounded: 10.9732870224186927691821913482791285127
Finding out how large something is compared to something can be done by dividing.
For example I have two dogs. One dog is 3 feet tall. The other is 2 feet tall. How much taller is dog one? Dog one is 1.5 times larger because 3/2 = 1.5 AND 2 x 1.5 = 3.
So for this case multiplying Earth’s diameter by 10.9732870224186927691821913482791285127 will give you Jupiter’s diameter.
What is the unit of pressure? Why is it called a derived unit?
Why has SI system
Answer:
pascal
Explanation:
its obtained after either division or multiplication
PLEASE HELP!!!
Elements located in the vertical column of the periodic table are of the same _______ and have _______ chemical properties.
A. group
B. period
C. similar
D. different
E. style
F. unlike
Answer:
I think its A & C
Explanation:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior.
Elements located in the vertical column of the periodic table are of the same group and have similar chemical properties, therefore the correct answer is option A and option C.
What is the atomic number?The total number of protons present in an atom is known as the atomic number of that atom.
While the atomic mass of an atom is the sum of the total number of protons and the number of neutrons present inside any atom.
The element belonging to the same group have approximately similar chemical behavior while on the other hand element belonging to the same period would have the same outermost shell.
The correct response is option A and option C because elements included in the vertical column of the periodic table belong to the same group and have comparable chemical characteristics.
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A runner decreases his velocity from 20 m/s to 10 m/s in 2.0 s.
What was his average acceleration?
We have that the average acceleration is
[tex]a=5m/s^2[/tex]
From the Question we are told that
Decreases his velocity from 20 m/s to 10 m/s in 2.0 s.\
Generally the equation for the average acceleration is mathematically given as
[tex]a=\frac{u-v}{t}\\\\a=\frac{20-10}{2}[/tex]
[tex]a=5m/s^2[/tex]
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difference between metals and nonmetals
Answer: Metals refers to the natural elements that are hard, shiny, opaque and dense. Non-metals implies those chemical substances that are soft, non-shiny, transparent and brittle. Most metals are hard, except sodium. Most non-metals are soft, except diamond.
Texting and driving is a dangerous act
and is illegal in many areas. Suppose a driver takes 3.5 seconds to send a text. Travelling at 95 km/h, how far in meters did the vehicle travel while the driver was distracted? (Hint: How many seconds are in an hour?
How many meters are in a km?)
Answer:
s = 92.36 m
Explanation:
The distance covered by an object moving with uniform speed is given by the following formula:
s = vt
where,
s = distance covered by car during the time when driver was distracted in texting = ?
v = uniform speed of car = (95 km/h)(1 h/3600 s)(1000 m/1 km) = 26.39 m/s
t = time taken by the driver for texting = 3.5 s
Therefore, using these values in equation, we get:
s = (26.39 m/s)(3.5 s)
s = 92.36 m
The second image !!!!!!
Answer:
Explanation:
No, not any of these substance will float in Methanol , simply because Methanol has a density of 0.79 g, if you put any substance that weighs more than 0.79 g, it will sink, it all depends on the weight if it is more or less than methanol
2: D=m/v
D=135/50 = 2.7 g/cm³ ( Aluminum)
D=M/V
if two objects has the same mass but one has larger volume, then te one with larger volume has less density
example : 2 objects
mass of both=350
volume of the first one=500 and the other 750
D1=M1/V1 = 350/500 =0.7
D2 = M2/V2 = 350/750 = 0.4666
D1 is larger than D2( with larger volume )
The dimensions of a room are 16.40 m long, 4.5 m wide and 3.26 m high. What is the volume of the room in cubic meters? Express your answer in scientific notation.
Answer:
the volume of the room is 240.588 meters3
The picture shows the scientific notation
The table shows results of an experiment that was replicated. Which best describes the data? They are neither precise nor reproducible. They are precise but not reproducible. They are accurate and reproducible. They are accurate but not reproducible.
Answer:
They are accurate and reproducible.
Explanation:
Answer:
They are precise and reproducible.
Explanation:I just took the test on Edgenuity
A forklift does 450 J of work to lift a 150 N hot tub. How high is the hot tub lifted? Round your answer to the nearest whole number
Answer:
3 m
Explanation:
[tex]work \: = force \times displacement \\ 450 = 150 \times displacement \\ displacement = 3m[/tex]
Why do we use percent deviation rather than simply expressing the size of the error itself?
Answer:
the percentage we have the fraction between the error and the magnitude,
Explanation:
When absolute error is used, it is a value that remains constant regardless of the magnitude of the measurement, for large measurements it can represent great accuracy, but for small measurements the accuracy may be low, for example> if we use a tape measure with error of Dx = 0.1 cm if the measurement is 1 meter this error is acceptable, but if the measurement is 1 cm the error is too big.
When we use the percentage we have the fraction between the error and the magnitude, so if this relationship is small the measure is very tight and but if the relationship is high the measure has little pressure, for example
Δx = 1 cm = 0.01 m
% = 0.01 / 1 100 = 1%
% = 0.01 / 0.01 100 = 100%
therefore the precision of the measurement is known the percentage error