Answer:
56N
Explanation:
Given parameters:
Distance = 40m
Work done = 2240J
Unknown:
Force exerted = ?
Solution:
The work done on a body is the force applied to move a body through a certain distance.
Work done = Force x distance
Now insert the parameters and solve for the force
2240 = Force x 40
Force = 56N
After completing an experiment, all chemical wastes should be
Answer:
The correct answer is
C. disposed of according to your instructor’s directions
Explanation:
The question is not complete here is the complete one with options to choose from
After completing an experiment, all chemical wastes should be
A. taken home
B. dumped in the sink
C. disposed of according to your instructor’s directions
D. left at your lab station for the next class
Please help me I’ll mark brainliest
When a cricket ball is thrown vertically upwards, it reaches a maximum height of 15 metres. (a) What was the initial speed of the ball ? (b) How much time is taken by the ball to reach the highest point ? (g=10 ms -2
Answer:
The velocity of the cricket ball is 17.32 m/s
Time is taken by the ball to reach the highest point = 0.8660 seconds
Explanation:
The cricket ball can be seen and treated as a projectile in this case
The maximum height attained by a projectile in motion can be calculated using the formula:
[tex]h = \frac{v^2 sin^2 \theta }{2g}[/tex]
In any projectile problem, once we know see that the object was released vertically upwards, we need to know that this means that the angle of projection is 90 degrees, and sin 90 is = 1
hence, h will be modified to become
[tex]h = \frac{v^2 }{2g}[/tex]
[tex]v = \sqrt{2gh}[/tex]
We are given that h = 15m and g = 10m/s2
[tex]v = \sqrt{2 \times 10 \times 15} = 17.32m/s[/tex]
The velocity of the cricket ball is 17.32 m/s
B. We can get the time it took to reach the highest point by dividing
time = distance/speed
Time = 15/17.32 = 0.8660 seconds
where should i graph the distance in a distance time graph
Answer:
Distance in Y axis and Time in axis
Answer:
the distance should be on the Y axis (vertical) and the time should be on the X axis (horizantial)
A laser beam is directed at the Moon, 380,000 km from the Earth. The beam diverges at an angle of \thetaθ of 0.8 x 10-5 rad. What diameter spot, in m, will it make on the Moon?
Answer:
3040 m
Explanation:
The formula to apply here is ;
d=∅*r where
d is the diameter of the spot , ?
∅ is angle of divergence in radians, = 0.8 * 10⁻⁵rad
r is distance of Moon from Earth, =380,000 km
Applying the formula as;
d=∅*r
d= {0.8 *10⁻⁵} * 380,000 * 1000
d= 3040 m
What is the resultant of the vectors shown?
Answer:
b
Explanation:
your welcome :)
Pleaaaase help meeee
Read the following case and discuss how you would respond to the situation.
PROBLEM:
You have been assigned the position of Environmental Engineer for one of several local
robotics manufacturers whose water discharges flow into a lake in a flourishing tourist area.
Although all the robotics companies in the area are marginally profitable, they compete for
the same customers. Included in your responsibilities is the monitoring of water and air
discharges
at your plant and the periodic preparation of reports to be submitted to the Department of
Natural Resources. You have just prepared a report that indicates that the
level of pollution in the plant's water discharges slightly exceeds the legal limitations. Your
boss, the Plant Manager, says you should regard the excess as a mere
"technicality," and he asks you to "adjust" the data so that the plant appears to be in
compliance. He says that the slight excess is not going to endanger human or fish
life any more than if the plant were in compliance. On the other hand, he says, solving the
problem would require a very heavy investment in new equipment. He
explains, "We can't afford new equipment. It might even cost a few jobs. It will set us
behind our competitors. Besides the bad publicity we'd get, it might scare off
some of the tourist industry, making it worse for everybody."
1) How do you think you should respond to your boss's request? Explain :
2) Define the problem :
3) what are the possible results of decision?
4) is there any information about the situation that is not obvious or available in the paragraph?
5) what are the ethical issues to consider in this situation
6) How did you decide to handle the situation what did you decide to do?
Answer:
3
Explanation:
What are the types of motion that can be observed in a pendulum ? Some one please answer.√
Answer:
periodic motion
Explanation:
The massive object is affectionately referred to as the pendulum bob. When the bob is displaced from equilibrium and then released, it begins its back and forth vibration about its fixed equilibrium position. The motion is regular and repeating, an example of periodic motion.
Warm 12 grams of water from 98 degrees Celsius to 99 degrees Celsius
Answer:
E=mc△T
E=0.012(4200)(99-98)
E=50.4J
50.4 joules of heat is used
a camel can walk easily on sandy desert but a horse cannot, why?
plz anyone tell
Answer:
I believe the camels hooves or whatever are built diffrenet.
Explanation:
A seismograph measures
a.
how much the surface of Earth moves during an earthquake.
b.
the speed of S waves.
c.
the force of the earthquake.
d.
the location of the epicenter.
4. A 5.00-kg sled starts at rest and accelerates down a 45.0° incline. The coefficient of
kinetic friction between the mass and the incline is .185.
a) What is the value of the of the acceleration of the sled
Answer: [tex]5.64\ m/s^2[/tex]
Explanation:
Given
mass of sled m=5 kg
Elevation [tex]\theta =45^{\circ}[/tex]
[tex]\mu _k=0.185[/tex] (coefficient of kinetic friction)
Friction will oppose the motion of the sled while sled weight sin component helps it to move down the incline
[tex]W\sin\theta-F_r=ma\\where\\W=weight(mg)\\F_r=Friction(\mu_kmg\cos\theta)\\a=acceleration[/tex]
Substituting values
[tex]mg\sin \theta-\mu_kmgcos\theta=ma\\g\sin \theta-\mu_kg\cos \theta=a\\a=g(\sin 45^{\circ}-0.185\times \cos 45^{\circ})\\a=5.64\ m/s^2[/tex]
How does work affect energy between objects so it can cause a change in the form of energy?
Sol
Work transfers energy.
O Work changes energy
O Work increases energy.
O Work decreases energy.
Answer:
Doing work' is a way of transferring energy from one object to another, energy is transferred when a force moves through a distance.
Explanation: So more energy, more work done bc u transferred more energy to move the object and doing the work. and if you only use a little of energy, the work done also only a little.
True or False: Solar energy drives winds around the globe as warm water and land heat the air.
Answer:
False
Explanation:
What is the composition of DNA? (What are the parts of a DNA molecule)
Answer:
In DNA, the pyrimidines are thymine and cytosine; the purines are adenine and guanine. Both strands of double-stranded DNA store the same biological ...
Explanation:
hope it helps
You go outside on a bright, warm day, How can you tell that you are absorbing radiant energy from the sun?
Answer:
you start sweating and it would get hot
why the spinner of a washing machine is made to spin at a very high speed
Answer:
Once rinsed, the inner drum starts to spin at high speed to remove any remaining water. This water goes out through the small holes in the inner drum into the outer drum before the pump removes any remaining water, and your clothes are ready to be taken out to dry
In the picture above, if the cue stick strikes the 0.2-kg cue ball with a force of 1.1 N, what will be the acceleration of the cue ball?
Answer:
0.55 m/s².
Explanation:
From the question given above, the following data were obtained:
Mass (m) of ball = 2 Kg
Force (F) applied = 1.1 N
Acceleration (a) =?
Force (F) is defined as the product of mass (m) and acceleration (a). Mathematically, the force (F) can be represented as:
Force (F) = mass (m) × acceleration (a)
F = ma
With the above formula, we can calculate the acceleration of the ball as follow:
Mass (m) of ball = 2 Kg
Force (F) applied = 1.1 N
Acceleration (a) =?
F = ma
1.1 = 2 × a
Divide both side by 2
a = 1.1 / 2
a = 0.55 m/s²
Therefore, the acceleration of the ball is 0.55 m/s²
Energy energy can be transferred from one form to another we use many Indrajeet Converse in our daily life observe carefully to find these energy conversion your home make a list of any ten convert including their names along with their energy chains
Answer:
Find the list below.
Explanation:
Energy conversion imply the transformation of energy from one form to another. Examples of these conversions in my home include the following:
1. Chemical energy stored in food is converted to mechanical energy used in working(example sweeping)
2. Chemical energy stored in batteries are used to produce sound energy from the radio.
3. Electrical energy flowing through the wires are used to provide heat energy from the heating device.
4. Electric energy stored in the fan is converted to kinetic energy.
5. Chemical energy stored in petrol is converted to mechanical and electrical energies in the generator.
6. Electric energy supplied by the electric gas cooker is used to generate thermal energy after heating water.
7. Electrical energy flowing through the wires supply light energy in the bulbs.
8. Electric energy is converted to light and sound energy in the televisions.
9. Light energy from the sun is converted to chemical energy in the plants at the garden.
10. Electric energy is converted to sound and light energy in the kitchen blender.
Transfer of charge by touching is called... induction or conduction?
Answer:
Transfer of charge by touching is called conduction.
When an old building is to be torn down, Mr. Pham’s company removes the bricks, cleans off the mortar from the bricks, and then sells the bricks to companies that restore historic buildings. Which compound is Mr. Pham’s company most likely to use in its work?
hydrochloric acid
nitric acid
sodium hydroxide
lithium hydroxide
Answer:
hydrochloric acid
Explanation:
The compound Mr. Pham's company used is most likely hydrochloric acid.
Hydrochloric acid is a strong acid and it is applied to remove corrosion and rusts from another body.
For industrial purposes, they are used as cleansing agents.The acid is capable of dissolving and breaking down the rust and corrosion.
A base does not have this property and would not effectively remove the corrosion.
Sodium hydroxide and lithium hydroxide are bases.
Nitric acid is not as strong as hydrochloric acid.
Answer:
hydrochloric acid
Explanation:
i just did the test 3 minutes ago.
hope this helps and have a good day.
:)
How much work is done when a 100 N force moves a block 59 m?
Answer:
5900J
Explanation:
Work=Forse*Distance
work = J, Jewls
100*59=5900
Hop this helps and can u think about brainlist
i put a picture on how to find these answers, if u got any more questions im here
Which type of wave forms at the boundary between air and water when you
drop a rock into a pond?
A. Electromagnetic
B. Surface
C. Longitudinal
D. Transverse
A chef fills 50cm3 container with 250g of cooking oil what is the density of the oil?
Given that,
Mass, m = 250 g
Volume of the container, V = 50 cm³
To find,
The density of the oil.
Solution,
Density = mass/ volume
The computation for density is as follows :
[tex]\rho =\dfrac{m}{V}\\\\\rho =\dfrac{250\ g}{50\ cm^3}\\\\=5\ g/cm^3[/tex]
So, the density of the oil is [tex]5\ g/cm^3[/tex].
5) A car travels 150 km in 2 hours. What is its speed?
(Show the correct units.)
Answer:
75km/hr
Explanation:
distance(d)=150km
time(t)=2hours
speed=distance/time
=150/2
=75km/hr
PLZZZ HELP
In addition to how much force Earth exerts on the object, which features of an object affect its weight?
A.mass and location of the object
B.shape and location of the object
C.location of the object and how much energy the object has
D.mass of the object and how much energy the object has
Answer/Explanation:
The weight of an object is defined as the force that is exerted due to the gravitational force.
Mathematically, it can be written as :
W = m g
Where
m is the mass of the object
g is the acceleration due to gravity
Also,
We know that the value of g varies with respect to the location. At the equator, the value of g is less as compared to the poles.
The feature of an object that affects its weight are :
Mass of the object
Location of the object
How much force Earth exerts on the object
How are the molecules in a gas different from molecules in other states of matter?
Answer: The molecules in gases are different from other states of matter
Explanation:
The molecules in gases are different from other states of matter because unlike, for example, a solid, they move around freely and are much more spread apart. A gas can fill up any container, but once the container is unsealed, the gasses will immedietly be let out. Gases can be compressed much more easily than a solid or a liquid.
Pls Solve this!!!Im giving 20 points and Brainliest to the one who answers first. HELP ME PLEASE!!!!!!!!
Answer:
i) 2Mg + O₂ + Δ Heat → 2MgO + Δ Energy
ii) The aqueous solution does not change in the color of the blue litmus paper and the blue litmus paper remains blue in color
The aqueous solution formed using the product (MgO) turns the red litmus paper blue
Explanation:
i) Magnesium easily burns in air or oxygen when heated to form a white powder of magnesium oxide. The burning (reaction) of magnesium in air is an exothermic reaction that involves the release of heat and light
The burning of magnesium wire is given by the following chemical reaction;
2Mg + O₂ + Δ Heat → 2MgO + Δ Energy
ii) When magnesium oxide is mixed with water if forms magnesium hydroxide Mg(OH)₂ as shown in the following chemical reaction;
MgO + H₂O → Mg(OH)₂
Magnesium hydroxide is basic and therefore it will turn red litmus paper blue and it does not change the color of the blue litmus paper.
no wrong answers please
TRUE OR FALSE: some rays of light carry radiation.
Answer:
true
Explanation:
Answer:
True
Explanation: