What should food workers do to prevent chemical hazards from contaminating food?
A. Wash their hands after taking out the garbage
B. Wear a hair net when working for food preparation areas
C. Store cleaning solutions and bottles away from food storage areas
D. Clean and San at is equipment and utensils for after hours of continuous use
The fire alarm goes off, and a 75 kg firefighter slides down a pole with a constant acceleration of a = 6 m/s square. What is the upward force F exerted by the pole on the firefighter? *
Answer:
450N
Explanation:
Given data
Mass m= 75kg
Acceleration= 6m/s^2
From the Newtons first law, F=ma
substitute
F=75*6
F= 450N
Hence the force is 450N
A 0.22kg mousetrap car has 3.1 J of potential energy due to the spring in the mouse
trap. What is the maximum speed the car will reach? Show your work and include units.
Answer:
r56
Explanation:
5. In which image below is the most work being wasted as heat?
A. Image A
B. Image B
C. Image C
D. Image d
Answer:
C
Explanation:
The rock takes 8.16s to return to its release point. Given that the elastic band provides a speed of 40m/s to the rock in 10 cm stretch.
What will be the speed of the rock?Initial speed of the rock, u = 40m/s
Final position of the rock s = 0m taking the release point as reference. The rock takes 8.16s to return to its release point. Given that the elastic band provides a speed of 40m/s to the rock in 10 cm stretch.
Nuclear energy is a useful source of power but has disadvantages. The disadvantage of nuclear energy is it produces dangerous waste.
Initial speed of the rock, u = 40m/s
Final position of the rock s = 0m taking the release point as reference
From the second equation of motion:
solving above we get:
t = 0s or t = 8.16s, t =0 seconds is neglected since it represents the initial position which is the same as the final position at t = 8.16s
So, the rock takes 8.16 seconds to return to the release point.
Therefore, The rock takes 8.16s to return to its release point. Given that the elastic band provides a speed of 40m/s to the rock in 10 cm stretch.
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on
Draw
3. The weight of a body varies from location to location. Where would the weight of the
body be least
On the moon
At sea level on earth
On top of Mount Everest
In space
4. We meet many different types of force every day. Some of these are shown in the list
below. However, one of these is NOT a force. Which one is it?
A
Speed
B
Push
C
Pull
Friction
Answer:
it's C a pull friction
Explanation:
because it's all said in the explained
A flashlight bulb connected to a 6 V battery draws a 0.5 current. What is the
power used by the flashlight bulb?
A. 3W
B. 12 W
C. 0.8 W
D. 5.5 W
Please answer this ASAP
Answer:
A 3W
Explanation:
Have a good day!
hehee
Power = (voltage) x (current)
Power = (6 V) x (0.5 Amp)
Power = 3 watts
You're watching a movie and all of a sudden the main character slips and pushes the cake he was holding into the ground. The equal but opposite reaction to the cake hitting the ground is...
A. The ground pushing against the main character
B. The cake pushing against the main character
C. The main character pushing against the cake
D. The ground pushing against the cake
Answer:
C?
Explanation:
I think its c cuz the character would be falling and cakes don't bounce when they fall, they just splat
also can we pretend i was watching demon slayer when this happens
is it true that the radiation that transfer thermal energy is a type of electromagnetic radiation
Answer:
Since heat is carried by electromagnetic waves, it does not need a physical medium to transfer it. Instead it radiates through space - this is how the Earth is heated by the Sun despite space being a vacuum.
Explanation:
Why do specific heat capacity of objects differ ?
Answer:
substances have different melting and boiling points to one another.
Explanation:
Explanation:
Each substance will have a different mass, so when the amount of heat and the change in temperature are held constant, the only variable is the mass. Therefore, because mass is the only variable, so because substances have different masses, they will have different specific heats.
Why is physics used to study stars?
A. Stars are interesting.
O B. Stars are circular.
O C. Stars are useful.
O D. Stars are made of matter.
Answer:
stars are made of matter
Convection currents will transfer heat throughout a gas until what condition arises?
A.
The gas condenses and forms a liquid.
B.
The gas particles stop moving entirely.
C.
The gas has the same temperature throughout.
D.
The gas has no thermal energy in it.
Answer:
C
Explanation:
pls mark brainlest ty
have a good day
The gas has the same temperature throughout. (C)
Which of the following are examples of etiquette? Check all of the boxes that apply.
prioritizing tasks
writing a note about a patient’s medical condition
following an employer’s dress code
following a company’s policy of addressing patients by their last names
Answer:
C& D
Explanation:
ON EDG2020
Answer: Its C and D
Explanation:
edge
PLEASE HELP!!!!!!! A student is trying to demonstrate static electricity, so they rub two identical balloons with a neutral rabbit fur to give them a charge. How
do these three objects now behave when brought near to each other?
A. They all attract each other.
B. The balloons repel each other but attract the rabbit fur.
O C. They all repel each other.
O D. The balloons attract each other but repel the rabbit fur.
I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wpazsebu
What is the amount of work required to increase a 1100 kg car's speed from 20.0 m/s to 30.0 m/s?
Answer:
250,000 im not really sure about this answer but this is what I got
The amount of work required to increase the speed of the car is 275000 J.
To calculate the amount of work required to increase the speed of the car, we use the formula below.
Formula:
W = m(v²-u²)/2................ Equation 1Where:
W = amount of work needed to increase the speed of the carm = mass of the caru = initial speed of the carv = final speed of the car.
From the question,
Given:
m = 1100 kgu = 20 m/sv = 30 m/sSubstitute these values into equation 1
W = 1100(30²-20²)/2W = 1100(900-400)/2W = 1100(500)/2W = 1100×500/2W = 275000 JHence, The amount of work required to increase the speed of the car is 275000 J.
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Please help me, I beg you
Answer:
40g
Explanation:
Solubility of Copper sulfate at 90°=60g
Solubility of potassium bromide at 90°=100g
100g-60g=40g
Which of the following is sensory information received from the middle ear related to movement and balance?
Oral perception
Auditory perception
Vestibular
Proprioceptive
Answer:
vestibular
Explanation:
In a tropic level, energy flows from the producer to the primary consumer and to a secondary consumer. True False
Answer:
True
Explanation:
This is true because in an energy flow, the primary producers such as plants produce their own foods by using energy from the sun. These primary producers are consumed by primary consumers such as rabbits for food, while secondary consumers such as snakes would consume the primary consumers.
By so doing, energy flows from one trophic level to the other.
A car goes East from 2 m/s to 16m/s in 3.5s. What is the Car's acceleration?
HELP ASAP THANKS
What happens to the mass of an object when the parts are rearranged?
Answer:
The law of conservation of mass is a fundamental principle of physics. According to this law, matter can be neither created nor destroyed. In other words, the mass of an object or collection of objects never changes, no matter how the parts are rearranged.
Hope it helps!!!
Answer:
their will be no change in this..
The law of conservation of mass is a fundamental principle of physics. According to this law, matter can be neither created nor destroyed. In other words, the mass of an object or collection of objects never changes, no matter how the parts are rearranged.
SCS_20-21_SCI_GR7_CFA2 answers
The basic unit of time is second - is it true or false ??
oints)
Two ropes are attached to a wagon, one horizontal to the west with a tension force of 30 N
and the other east and at an angle of 30° northward and a tension force of 40 N. Find the
components of the net force on the cart. Show all your work.
Answer:Assuming the two ropes are knotted onto the same point of the wagon, the net force is computed of the sum of the two stated.The westward force is Fw = (-30,0); then the northeastward force is Fne = (50*cos(30°),50*sin(30°)).Adding the two is just adding each part, so the resulting force is Fnet = (-30+50*cos(30°),50*sin(30°)).
Going more than that, the magnitude uses the Pythagorean formula:so √[(-30+50*cos(30°))²+(50*sin(30°))²] which is about 28.32N.
Explanation: justttt understanddd myy ansswerr hehezz
what is the equation for net force
Answer:
Is to add all forces, for example either the gf = gravitational force
Ff= force fiction
Fn= normal force
Thus, fg + ff + fn = y will give you results
Well then the forces you use in your exercises or questions.
The equation for net force is: ΣF = ma
or, ΣF = Δp/Δt.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
A spring balance can be used to calculate the Force. Newton is the SI unit of force.
Hence, net force applied on the object = mass × acceleration
ΣF = ma
It can be written in another from as:
net force applied on the object = change in momentum ÷ time interval
ΣF = Δp/Δt
So, the equation for net force is: ΣF = ma
or, ΣF = Δp/Δt.
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Observe: Click Reset. Turn on Show velocity vector and Show velocity components. Set vinitial to 50 m/s and set θ to 45.0 degrees. Click Play. Focus on the blue and red arrows that represent the vertical and horizontal components of the golf ball’s velocity. As the ball flies through the air, what do you notice about the blue (vertical) arrow?
Answer:
v_y = v_{oy} - g t
where the upward direction is positive, so the arrow represents this speed (blue) must decrease, reach zero and grow in a negative direction as time progresses
Explanation:
In this exercise you are asked to observe the change in velocity in a projectile launch.
If we assume that the friction force is small, the velocity in the x-axis must be constant
vₓ = v₀ₓ
Therefore, the arrow (red) that represents this movement must not change in magnitude.
In the direction of the y axis, the acceleration of gravity is acting, so the magnitude of the velocity in this axis changes
v_y = v_{oy} - g t
where the upward direction is positive, so the arrow represents this speed (blue) must decrease, reach zero and grow in a negative direction as time progresses
Caroline uses 20 N of force to move a box of books 10 m. How much work
did she do?
Work = (force) x (distance)
Work = (20 N) x (10 m)
Work = 200 Joules
work and power!
______is the amount of work done over time a. Efficiency C. Power b. Newton d. Horsepower
Answer:
The work done in a unit of time is C. Power.
Explanation:
Hope this helps
If a special type of ice has a specific heat capacity of 2060 J/kg K. How
much heat must be absorbed by 2.6 kg of ice at -27.00 C to raise it up to
0.00 C, before any melting takes place?
A. 140,000 J
B. 290,000 J
C. 56,000 J
D. None of the above
Answer:
Q = 144612 Joules.
Explanation:
Given the following data;
Mass = 2.6 kg
Initial temperature = -27°C to Kelvin = 273 + (-27) = 246K
Final temperature = 0°C to Kelvin = 273K
Specific heat capacity = 2060 J/kgK.
To find the quantity of heat absorbed;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
dt = T2 - T1
dt = 273 - 246
dt = 27 K
Substituting the values into the equation, we have;
[tex] Q = 2.6*2060*27[/tex]
Q = 144612 Joules.
The space shuttle, which was first launched on April 12, 1981, is the world's
first reusable space vehicle. The shuttle is placed in orbit by three engines that
do 1.4 x 1013 J of work in 8.5 min. What is the power output of these engines?
Answer:2.7 X 10₁₀W = 27 GW
Explanation:
W=1.4 X 10₁₃ J
ΔT=8.5 mins
P=W/ΔT=
1.4 x 10₁₃J/(8.5 mins)(60s/min)=2.7 x10₁₀W=27GW
If two monochromatic light waves undergo destructive interference, the amplitude of the resultant wave is
Answer: The amplitude is 0. (assuming that the amplitude ot both initial waves is the same)
Explanation:
When two monochromatic light waves of the same wavelength and same amplitude undergo destructive interference, means that the peak of one of the waves coincides with the trough of the other, so the waves "cancel" each other in that point in space.
Then if two light waves undergo destructive interference, the amplitude of the resultant wave in that particular point is 0.
Answer:
No, the resulting wave in the diagram does not demonstrate destructive interference. The resulting wave in the diagram shows a bigger wave than Wave 1 or Wave 2. If it demonstrated destructive interference, it would be a smaller wave or a horizontal line. With destructive interference, waves break down to form a smaller wave, or cancel each other out, resulting in no wave formation.
Explanation:
edge
An individual with a mass of 105 kg moves forward with a momentum of 575 kg-m/s. How fast are they traveling?
Answer:
5.47 m/s
Explanation:
p=ma
575=105v
v=575/105
v=5.47 m/s
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