Name any 2 physical quantities which have same dimensions.Can a quantity have unit but no dimensions?Explain
Answer:
uantities having units, but no dimensions : Plane angle,angular displacement, solid angle. These physical quantities possess units but they do not possess dimensional formulas.
Energy and work have the same dimensions force × distance.
Explanation:
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Questlon 3 of 5 What statement best describes what a circle graph shows? O A. Data as proportions of a whole B. The relationship between two variables OC. A frequency distribution D. The average of a data set
Answer:
it would be a
Explanation:
Physics is Confusing :( pt 2
Answer:
C
Explanation:
yeah it is
In a softball game, a batter hits the ball at the velocity and angle shown
below. What is the maximum range of the ball?
Velocity = 32m/s
50°
Range
A. 95.1 m
B. 102.9 m
C. 80.0 m
7
D. 113.5 m
Solve the following exercises and discuss your results with your classmates and teacher.
1. The initial, final position and displacement of a particle are:
a) xi = 20m, xf = 6m How much did it move?
b) xi = 10km, Δx = –15km, what is the final position of the particle?
2. An athlete jogs from one end of a straight 80m track to the other:
a) What is your one-way displacement?
b) What is your return displacement? (taking negative direction back)
c) What is its displacement in the total trot?
d) What is your one-way distance?
e) What is your total trot distance?
3. In a circular skating lane whose radius is 96 m, the skater begins to move from point A
to point B which is at the opposite end. Consider the path to be a semicircle
a) What is its displacement?
b) What is the distance traveled?
Answer:
5379393 is the answer of the question
Explanation:
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What is electricity and where does it come from?
Answer:
it is created power we use everyday
electricity is made of the flow of electrons.
but its made by a generated by a power plant bye electric generators
brainliest?
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write one general properties of non contact force
Answer: Gravitational force between the two masses does not depend on the medium separating two masses.
An ant climbs to the very end of the second hand on a wall-mounted clock at exactly 9:15:00. The second hand is 13.5 cm long. When the time is exactly 9:17:30, (a) what distance did the ant travel? (b) What is the ant‟s displacement at this time? (c) What was the ant‟s average speed? (d) What is the ant‟s average velocity at this time? (e) At what time would the ant have traveled a distance of 100. M (give your answer to the nearest second).
Answer:
Explanation:
a) The second arm measures the minutes. The difference between 9:17:30 and 9:15:00 is 2 minutes 30 seconds. This means the second arm would have revolved 2.5 times.
The circumference = 2πr= 2π(13.5 cm) = 84.823 cm
Distance = 2.5 × 84.823 cm = 212 cm = 2.12 m
b) Displacement of an object is the shortest distance between the initial and final point. Since the second arm revolves 2 and half times, we use only the half times (a semicircle)
Displacement for semicircle = 2r = 2(13.5) = 27 cm
c) Average speed = distance / time
time = 2 minutes 30 seconds = 150 seconds
Average speed = 212 cm / 150 s = 1.41 cm/s
d) Average velocity = displacement / time = 27 cm / 150 s = 0.18 cm/s
e) number of revolutions = 100 m / circumference = 100 m / 0.848 m = 117.92
but 1 revolution = 1 minute
117.92 revolution = 117 minutes 55 seconds = 1 hour 57 minutes 55 seconds
Hence the time would be: 11:12:55
What happens to the times difference between primary and secondary waves
Answer: The time differences become bigger.
Explanation: Suppose a primary and secondary wave both travel a distance of 4,000 km before they are picked up by a seismograph.
5 health benefits of physical activity
Answer:
reduce your risk of a heart attack.
manage your weight better.
have a lower blood cholesterol level.
lower the risk of type 2 diabetes and some cancers.
have lower blood pressure.
have stronger bones, muscles and joints and lower risk of developing osteoporosis.
Maddie and Juan's were given to task of trying to cook a s more using the Sun! They built this oven using a box and aluminum foil After setting up the device, they put four s'mores in the box. Ten minutes later the s'mores were hot and ready to eat. Describe the energy transtormation that took place in the students oven. 4) A radiant energy to heat energy B) radiant energy to light energy reflected energy to heat energy D) bght energy to mechanital energy
what we call the state in a human body if cerebrum is not functioning well
An eraser is thrown upward with an initial velocity of 5.0 m/s. The eraser's velocity after 7.0 seconds is ____ m/s.
Answer: -64
Given parameters:
Initial velocity of eraser = 5.0m/s
Time = 7.0s
Unknown:
Final velocity = ?
Solution:
Since we have been given the initial velocity and duration of the throw, we can apply the appropriate motion equation to solve this problem.
V = U - 2gt
where V is the final velocity
U is the initial velocity
g is the acceleration due to gravity = 9.8m/s²
t is the time taken
V = U - gt
V = 5 - (9.8)(7)
V = -63.6 or -64m/s
The velocity is -64m/s
As the eraser is thrown upward, its velocity after 7.0 seconds is approximately -64m/s.
Given the data in the question;
Initial velocity of the eraser; [tex]u = 5.0m/s[/tex]
Final velocity; [tex]v = \ ?[/tex]
Time; [tex]t = 7.0s[/tex]
To determine the eraser's velocity after 7.0 seconds, we us the First Equation of Motion:
[tex]v = u + at[/tex]
Where v is the final velocity, u is the initial velocity, t is the time and a is the acceleration. Since the eraser was thrown upward, acceleration due to gravity becomes ( negative acceleration ) [tex]g = -9.8m/s^2[/tex]
Hence, the equation becomes
[tex]v = u - gt[/tex]
We substitute in our values and solve for "v"
[tex]v = 5.0m/s - ( 9.8m/s^2 \ *\ 7.0s )\\\\v = 5.0m/s - 68.6m/s\\\\v = -63.6m/s\\\\v = -64m/s[/tex]
Therefore, as the eraser is thrown upward, its velocity after 7.0 seconds is approximately -64m/s.
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Your science class is going to play a game of tug-of-war and you need to divide up the teams. There are 11 people participating. If you want equal teams, how would you decide who is on which side and why? Use what you have learned about Newton's Laws of motions to explain.
Answer:
5
Explanation:
20m/s into km/hr20 metre
Answer:
72 [km/h]
Explanation:
To solve this conversion we need to perform a dimensional analysis, in a simple way.
[tex]20\frac{m}{s} *1\frac{km}{1000m}*60\frac{s}{1min}*60\frac{min}{1hr}\\ = 72\frac{km}{h}[/tex]
As you climb a mountain, the boiling point (temperature) of water:
1. decreases
2. remains at 100° C
3. increases
Answer:
1, decrease
Explanation:
At higher altitudes, air pressure is lower. When atmospheric pressure is lower, such as at a higher altitude, it takes less energy to bring water to the boiling point. Less energy means less heat, which means water will boil at a lower temperature at a higher altitude.
If you walk 90 meters and you complete the walk in 50 seconds what is your speed?
Answer:
i think this is the answer
Explanation:
Cindy runs 2 kilometers every morning. She takes 2 minutes for the first 250 meters, 4 minutes for the next 1,000 meters, 1 minute for the next 350 meters, and 3 minutes for the rest.
Cindy’s average speed for the entire run is meters per minute. One kilometer is the same as 1,000 meters.
Answer:
200 m/min.
Explanation:
From the question given, we obtained the following data:
Total distance = 2 km
Total time = 2 + 4 + 1 + 3
Total time = 10 mins
Average speed =.?
Next, we shall convert 2 km to metre (m). This can be obtained as follow:
1 km = 1000 m
Therefore,
2 km = 2 km × 1000 m / 1 km
2 km = 2000 m
Therefore, 2 km is equivalent to 2000 m.
Finally, we shall determine the average speed of Cindy as follow:
Total distance = 2000 m
Total time = 10 mins
Average speed =.?
Average speed = Total distance /total time
Average speed = 2000 /10
Average speed = 200 m/min.
Therefore, the average speed of Cindy is 200 m/min.
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What is the sum of all forces that act upon an object called?
a
Net force
b
Balanced force
c
Unbalanced force
d
Gravitational force
Answer:
net force
Explanation:
The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out.
Answer:
a
Explanation:
What is is
optical instrument
Answer:
A simple microscope is an optical instrument we use for the magnification of small object to get a clear image or vision.It is a convex lens having a short focal length.
Answer:
Optical instruments is an instrument which is used in lens to make the image of an image
How do you calculate Mass using the formula for force?
Group of answer choices
acceleration plus force
Force divided by acceleration
force times acceleration
force minus acceleration
---------------------------------------------------------------
How do you calculate mass using the density formula?
Group of answer choices
density plus volume
density times volume
density minus volume
Density divided by the volume
---------------------------------------------------------------
How do you calculate distance using the speed formula?
Group of answer choices
Time plus speed
speed times time
speed divided by time
speed minus time
---------------------------------------------------------------
How do you calculate volume using the density formula?
Group of answer choices
Mass times density
Mass divided by the density
Mass minus density
Density divided by the mass
---------------------------------------------------------------
How do you calculate acceleration using the force formula?
Group of answer choices
Mass divided by force
Force times mass
Mass times force
force divided by the mass
The sun and moon seem to move across the sky each day because of the earths blank on its axis
Answer:
The Earth Rotates on its axis
Explanation:
b) What is work? Write down the types of work.
1 What is the main function of nucleic acids?
2 Forming much of the structure of cells
3 Providing a layer of insulation
4 Storing energy
5 Storing genetic information
Answer:
storing genetic information
Watching your mother bake bread, you learned that the dough of the bread rises because yeast acts on the sugar and releases gas. You wonder whether the amount of sugar used will affect the size of the bread. That is, if you add more sugar, the size of the bread will be larger. Your mother’s recipe calls for 60 grams of sugar to produce a loaf of bread about 1260 cm3 what is the problem
Answer:
The question is not complete, below is the completed question:
Watching your mother bake bread, you learned that the dough of the bread rises because yeast acts on the sugar and releases gas. You wonder whether the amount of sugar used will affect the size of the bread. That is, if you add more sugar, the size of the bread will be larger. Your mother’s recipe calls for 60 grams of sugar to produce a loaf of bread about 1260 cm3. What is the independent and dependent variables?
Answer:
independent variable: amount of sugar used
Dependent vairable: size of bread
Explanation:
In a scientific experiment, there are two main types of variables; independent and dependent variable:
Independent variable: This is the variable that is completely under the control and manipulation of the experimenter. The values of this variable can be varied at will, and the effect of the variation affects the dependent variable. In this example, the independent variable is the amount of sugar used, because the amount of sugar used is determined by the baker.
Dependent variable: The dependent variable is the variable that changes as a result of the manipulation of the independent variable. It is not directly under the manipulation of the experimenter, and it is the variable that the experiment seeks to study. In this example, the size of the bread is the dependent variable because it depends on the amount of sugar used.
Plz guys answer my question
Why is speed a scaler quantity
Answer:
Speed is a scalar quantity it is the rate of change in the distance travelled by an object, while velocity is a vector quantity it is the speed of an object in a particular direction.
Who yall think gonna win Seahawks or Vikings? Seahawks all the way
Answer:
Seahawks
Explanation:
THEY ARE THE BEST TEAM!!!
Answer:
seahawks
Explanation:
yes they r gud
The capitary action of water is caused the cohesion of water molecules to different types of molecules and the adhesion of water molecules with other water molecules true or false
Which of the following objects has the most gravity? A. a semi-truck B. A grain of sand C. Jupiter D. All of these have equal gravity
Answer:
C. Jupiter
Explanation:
Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
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