Answer:
b
Explanation:
I think im not really sure tho
Answer: A
Explanation:
The greatest contribution in early microscopy came from Antonie van Leeuwenhoek of Holland. In 1676, Van Leeuwenhoek, he used his handcrafted microscope that was able to magnify up to 270 times.
Is it possible to have positive velocity and positive acceleration?
Explanation:
Yes. For example, when you press the gas pedal in a car, you accelerate in the same direction that you are moving in. So the velocity and acceleration have the same sign.
How long will your trip take if you travel 4000 m at an average speed of 8m/s
Answer:8.3mins
Explanation:
S=Vt
where V=average speed
S=4000m V=8m/s
4000=8×t
t=4000/8
t=500s
t=500/60
t=8.3min
500 sec
8 min 20 sec
Explanation:Hi there !
8 m ................ 1 s
4000 m ........ x s
x = 4000m×1s/8m = 500 sec = 8 min 20 sec
Good luck !
What is the difference between a measurement and an observation?A. Measurements are made with tools; observations are not.B. Observations are biased, while measurements are always unbiased.C. Measurements are compared to a standard; observations are not.D. Observations are only indirect ways of gathering data.
Answer:
A. Measurements are made with tools; observations are not
Explanation:
Measurement: the assignment of numbers or codes according to prior-set rules.
Observation: data from an individual study subject or sampled unit.
Measurement error: differences between "true" answers and what appears on data collection instruments
hope this helps
plz mark brainleist
What is the effect of_on_?
skin cancer and it cause to lost transportating process
If a distance versus time graph is flat, what does that say about the velocity at that time?
Answer:
In either case, the curved line of changing slope is a sign of accelerated motion (i.e., changing velocity). Applying the principle of slope to the graph on the left, one would conclude that the object depicted by the graph is moving with a negative velocity (since the slope is negative ).
Explanation:
An automobile slows from 26 m/s to 18 m/s. Its acceleration is −2.0 m/s 2 . How much time does it take for the vehicle to slow down?
Answer:4.0s
Explanation:jus is
The ball is partially white, is that an observation or an inference??
Answer:
this is an observation.
Explanation:
you are observing that the ball is partially white
How fast must the space shuttle go to cover 20,000 meters in 4.0 seconds?
Answer:5000 m/s
Explanation:
I’m taking physics and this is very confusing to me any help?
Answer:
(1.) 0.000207 (2.) 3300 (3.) 4030 (4.) 25.4
Explanation:
Answer:
Just conversion of units
Explanation:
Mnemonic Device: Kings Hate Dragons Because Dragons Can’t Make Money
(Kilo, Hecto, Deca, Base, Deci, Centi, Milli, Micro)
First one is decaliter which is 10 liters so I convert to liters first 0.0007 liters and then add another 0 to make it in daL so 0.00007
Second is converting from meters to millimeters so 1000mm go into one meter so 3100mm
Same thing for the mass one 0.3kg to ____g well there is 1000g/1kg and then the kg cancel out (this is the safest way to do this) and you get 300 grams
The last one is cm to decimeters not deca and there are 10 centimeters in each decimeters or you could convert to meters and then back again. I would just take the easy out and go with 25.4cm (I think of this one like mm to cm as it is the same ratio and how many times have you used a ruler with both units on it. A 30 cm ruler would be 3 decimeters for the whole 30 cm.
3. An athlete swims from the north end to the south end of a 50.0 m pool
in 20.0 s and makes the return trip to the starting position in 22.0 s.
a. What is the average velocity for the first half of the swim?
b. What is the average velocity for the second half of the swim?
c. What is the average velocity for the roundtrip?
Answer:
a.2.5 m/s
b.2.27 m/s
c.2.385 m/s
Explanation:
velocity=displacement/time
a.50/20=2.5 m/s
b.50/22=2.27 m/s
c.average velocity=total velocity/2
=2.27+2.5/2
=4.77/2
=2.385 m/s
Balanced forces acting on an object
O Always change the object's motion.
O Sometimes change the object's motion.
O Never change the object's motion.
O Are not related to motion.
Answer:
Balanced forces do not change the motion of an object. The motion of an object will not change if the forces pushing or pulling the object are balanced. An object that is sitting still will stay still if the forces acting on it are balanced
Explanation:
When two forces acting on an object are equal in size but act in opposite directions, we say that they are balanced forces . If the forces on an object are balanced (or if there are no forces acting on it), this is what happens: ... a moving object continues to move at the same speed and in the same direction.
Jimmy can travel 550 miles South in 10 hours. Jimmy's velocity is____
Answer:
The answer is
55 miles/hrExplanation:
The velocity or speed of an object can be found by using the formula
[tex]velocity \: = \frac{distance}{time} [/tex]
From the question
time taken to travel = 10 hours
distance covered = 550 miles
Substitute the values into the above formula and solve for the velocity
That's
[tex]velocity = \frac{550}{10} [/tex]
We have the final answer as
55 miles/hrHope this helps you
the friction between a nonmoving object and the surface is resting on is called..?
I honestly can't find the answer to this
Answer:
Static friction exists between a stationary object and the surface on which it is resting. It prevents an object from moving against the surface. Example: Static friction prevents an object like a book from falling of the desk, even if the desk is slightly tilted
Explanation:
hope this helped
PLEASE HELP THIS IS DUE TODAY If an element's atomic mass and atomic number are known, what else can be determined? Give an example to demonstrate your understanding.
The Venn diagram shows the relationships of the subsets of the real number system. Where does the square root of 25 belong
Answer:
square root of 25 belongs to rational number
1. Do you think your memories can be altered? Explain
Answer:
Yes
Explanation:
I think our memories can be altered by emotions. If someone tells you something over and over and over again with strong emotion you will start to remember that more than the memory.
Emotions are very powerful and if you feel a certain emotion connected with a different memory I think that is stronger and can trick your brain into thinking that is the memory because of the strong emotion, even though the true memory was right, since it might not have as strong of mental emotion your brain will think that is the false memory because whatever is more memorable your brain will remember.
If that makes any sense,
7
Mark is performing an investigation to determine what type of fertilizer helps a plant grow best. He plants ten plants of the same type
in a garden and gives them all the same amount of water and fertilizer each day. However, he gives each plant a different type of
fertilizer
Which variable in the experiment should Mark control (or keep constant)?
A location of the plants
OB amount of fertilizer given daily
Camount of water given daily
OD all of these
Reset
Submit
From fastest to slowest, rank the speeds of the balls 1 s after being thrown. Rank the speeds of the balls from fastest to slowest. To rank items as equivalent, overlap them. Three balls of different masses are thrown straight upward with initial speeds as indicated: PICTURE
rank speeds
rank acclerations
Explanation:
From the given figure,
Mass of ball A is 4.9 kg and its initial speed is 8 m/s.
Mass of ball B is 1.9 kg and its initial speed is 14 m/s.
Mass of ball C is 0.7 kg and its initial speed is 2 m/s.
We need to find the final speed of the balls 1 s after being thrown. They all are thrown upward under the action of gravity. The equation of motion is : v = u -gt, g = 10 m/s²
For ball A,
v = 8-10(1) = = -2 m/s (downward)
For B,
v = 14-10(1) = 4 m/s (upward)
For C,
v = 2-10(1) = -8 m/s (downward)
It means the ranking is B>A>C i.e. the speed of ball B is the most and that of C is least.
All the balls are moving under the action of gravity. It would mean that the acceleration for all balls is same i.e. 10 m/s²
