Answer:
307.07N
Explanation:
Given
Weight of object = 250N
angle of elevation = 18.0°
coefficient of kinetic friction n = 0.26
acceleration = 9.81m/s^2
Required
Force parallel to the ramp
Using Newton second law
F = ma
Fm - Ff = ma
Fm - nR = ma
Fm = ma +nR
Fm = 25(9.81) + 0.26(Wcostheta)
Fm = 25(9.81) + 0.26(250cos18)
Fm = 245.25+61.81
Fm = 307.07N
Hence he magnitude of the force that the rope exerts on the crate parallel to the ramp is 307.07N
18. A series circuit has an array of light bulbs connected. One burns out.
What will happen to the rest of
the bulbs?
*
Most will also burn out
Half will switch off and half will remain on
They will all remain on
They will all switch off
HELP ILL MAEK BRAINLIEST!!!
Match the following activities.
1. amount of force times the distance it moves an object
force of gravity
2. kind of force used to operate engines
steam
3.
English unit of measuring work equal to moving one pound
one foot
work
4.
metric measurement of work equal to moving one newton
one meter
muscular force
5. kind of force that pulls things toward the center of the earth
newton-
meter
6. force used when walking
force of wind
7. force used to turn a windmill
foot-pound
I shall give you the ruler.change to passive
Answer:
The ruler shall be given to you.
I tried but that's basically how it should look.
Radio waves are a type of______
wave and can travel through space whereas sound waves cannot travel through space because they need to travel through _____
Answer:
I already know the first one is electromagnetic but I don't know the second one sorry
Explanation:
Measuring a liquid's volume indicated the capacity ______ of the holds it. The most common units for expressing liquid volumes are _____ and milliliters.
Answer:
Measuring, comparing and estimating liquid volumes are taught using metric units like liters and milliliters and customary units like quart, pints, gallons and more. Capacity is actually the amount of liquid in the container, which is also the volume of a liquid.
Explanation:
PLEASE HELP!! NO LINKS OR RANDOM WORDS!! If you were looking at the Moon from space (so that you could see all sides of it), how much of it would be lit by the sun at any given time?
1) All of it
2) Half of it
3) It varies depending on the Moon's phase.
4) It varies depending on the time of the year.
Answer:
3) It varies depending on the Moon's phase.Explanation:
In the oxygen cycle, oxygen is
(Choose one):
1.) added to and removed from the atmosphere by photosynthesis.
2.) added to the atmosphere by cellular respiration and removed by photosynthesis.
3.) added to the atmosphere by decomposers and removed by photosynthesis.
4.) added to the atmosphere by photosynthesis and removed by cellular respiration and combustion.
Answer:
4.) added to the atmosphere by photosynthesis and removed by cellular respiration and combustion.
Explanation:
The atmospheric cycle is a biogeochemical cycle and is a transition between the oxidation state in ions, oxides, and molecules. The largest reservoir on the earth for oxygen island or lithosphere. The crust and mantle together make up 99.5% of oxygen by volume. The rest is found in the air that 21%, 22% in the biosphere, and 33% in the hydrosphere.What is the length of a string with a mass of 2.5 kg, with a
tension of 20 N, if the speed of wave on the string is 2 m/s?
Answer:
.5 m
Explanation:
It is correct lol.
which drawing below represents the electric field surrounding two objects that have equal magnitude changes of opposite polarity?
Answer:
the 3rd one
Explanation:
j cause I think so
how does add it in enhance the rate of reaction ? explain in short.
Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.
A set of data is collected from a simple circuit with a
20 Ω resistor and is represented in the table.
The current at 5.0 V is
A.
The current at 15 V is
A.
Answer:
A. Recall Ohm's Law: V = IR
If V = 45 volts, and I = 5 amps, the R = V/I = 45V/5A = 9Ω
B. We know the potential difference and the resistance, both of which have good units. All we have to do is plug the known values into the equation and solve for the current:
I=15V9Ω
Thus, the electric current is: 1.67A
Answer:
.25
.75
Explanation:
edge
when the net force of opposite forces is zero , the forces are
A. not even
B. unequal
C. unbalanced
D. balanced
if 1cm^2 of cardboard costs 0.01¢ and i needed 10.16cm of cardboard how much would the total be
If the work required to speed up a car from 11 km/h to 21 km/h is 6.0×103 J , what would be the work required to increase the car’s speed from 21 km/h to 33 km/h
Explanation:
We need convert the velocities first to m/s and we get the following:
v2 = 21 km/hr = 5.8 m/s
v1 = 11 km/hr = 3.1 m/s
We need to find the mass of the car also for later use do using the work-energy theorem:
[tex]delta \: w = \frac{1}{2} m(v \frac{2}{2} - v\frac{2}{1} )[/tex]
6.0x10^3 J = (0.5) m [(5.8)^2 - (3.1)^2]
or
m = 499.4 kg
Now we determine work needed delta W to change its velocity from 21 km/hr to 33 km/hr
v2 = 33 km/hr = 9.2 m/s
v1 = 21 km/hr = 5.8 m/s
delta W = (0.5)(499.4)[(9.2)^2 - (5.8)^2]
= 1.3 x 10^4 J
Can anyone help me with this
a
sorry if its not right
Based on information from the graph above, what can be concluded about the relationship between the temperature of a solvent and the solubility of a solute?
A. No conclusions can be drawn.
B. For most solutes, as temperature increases, the solubility is unaffected.
C. For most solutes, as temperature increases, the solubility increases.
D. For most solutes, as temperature increases, the solubility decreases.
The filament is broken in a light bulb. The circuit is now
a. open circuited
b. closed circuited
c. neither closed nor open
Answer:
It is A. Open Circuit.
Explanation:
Filament heats up and produces the light. If the filament breaks, the current does not flow and the circuit will be open. The ammeter will reach zero when this happens.
Please tell the answer..
[tex] \huge \boxed{ \mathbf{Answer࿐}}[/tex]
The correct option is : C.
____________________________________________________________________________________
Displacement is the shortest distance covered by an object to reach the destination from the starting point . so it can be both positive and negative.
____________________________________________________________________________________
[tex] \mathrm{ \#TeeNForeveR}[/tex]
what is the ideal mechanical advantage of a lift that allows you raise a 90.0-kg refrigerator with 80.0 N of force?
a. 11
b. 7.2
c. 72
d. 1.1
Answer:
11
Explanation:
The ideal mechanical advantage of a lift would be 11, which allows you to raise a 90.0 - kg refrigerator with 80.0 N of force, therefore the correct answer is option A .
What is the mechanical advantage?
Mechanical advantage is defined as a measure of the ratio of output force(load) to the input force(effort) in a system, It is used to analyze the forces in simple machines like levers and pulleys .
Mechanical advantage = load / effort
As given in the problem we have to find out the e ideal mechanical advantage of a lift that allows you to raise a 90.0-kg refrigerator with 80.0 N of force ,
The mechanical advantage of the lift = 90 × 9.8 / 80.0
= 11
Thus , the ideal mechanical advantage of a lift would be 11 ,
To learn more about Mechanical advantages, here, refer to the link given below ;
brainly.com/question/16617083
#SPJ2
which types of change observe the law of conservation of mass? single answer
A. only changes of state
B. only physical changes
C. only chemical changes
D. physical changes and chemical changes
Answer:
d
Explanation:
d just because it is and it's talking about mass and physical match's up with mass
Do children under the age of 13 that have social media accounts have more behavior problems in school? What is the independent variable?
A). The number of behavior problems in school
B). Children under 13 with social media accounts
C). Use of electronics after 9 PM
D). Students over the age of 13
Answer:
A
Explanation:
Friction _____.
1.happens whenever work is done
2.does not happen in the air
3.releases energy as light
4.absorbs heat energy
A point charge at the origin of a coordinate system produces the electric field E=(56,000 N/C) x on the x-axis at the location x=-0.65m. Determine the sign and magnitude of the charge.
Answer:
q = 1.95 x 10⁻⁶ C = 1.95 μC
Explanation:
The formula for the electric field produced by a point charge is given as follows:
[tex]E = \frac{kq}{r^2}\\[/tex]
where,
E = Electric Field strength = 56000 N/C
k = Colomb's Constant = 9 x 10⁹ Nm²/C²
q = magnitude of charge = ?
r = distance = 0.65 m
Therefore,
[tex]56000\ N/C = \frac{(9\ x\ 10^9\ Nm^2/C^2)q}{(0.56\ m)^2}\\\\q = \frac{(56000\ N/C)(0.56\ m)^2}{9\ x\ 10^9\ Nm^/C^2}\\\\[/tex]
q = 1.95 x 10⁻⁶ C = 1.95 μC
When the forces acting on a stationary object are unbalanced, the object will
A. remain stationary
B. begin moving and speed up
C. remain moving at a constant speed
D. No effect
Answer:
B
Explanation:
Well it is certainly not no effect. Something has to happen. Not D.
If the balances are unbalanced it means that there is a force left over that can cause an acceleration. The speed is not constant when there is an acceleration. Not C
Unbalanced forces mean that there has to be something happening. Unless the friction cannot be overcome, there will be motion. Not A. But it is your second best answer if there is friction.
The answer I think you are intended to give is B.
PLEASE HELP ASAP!!!!!
a force of -7.7 x 10^3N exists between a positive charge of 5.6 x 10-^4C and a negative charge of -2.1 x 10^-4C. What distance separates the charges?
Answer:
r = 0.37 m
Explanation:
Use Coulomb's law to solve for r:
F = kq1q2/r^2
---> r^2 = kq1q2/F
= (8.99×10^9)(5.6×10^-4)(-2.1×10^-4)/(-7.7×10^3)
= 0.1373 m^2
or r = 0.37 m
HELP PLS ILL GIVE U BRAINLIST
Which of the following is NOT a term used to describe the conductivity of materials ?
A: Semi Insulator
B: Insulator
C: semiconductor
D: conductor
B. insulator
hope this was helpful
Answer:
B. Insulator
Explanation:
Cant conduct heat or electricity?
Two 1.2 kΩ resistors are in series and this series combination is in parallel with a 3.3 kΩ resistor. The total resistance is
Explanation:
you have to divide by 2 and times by 2
A car with a mass of 2000 kg accelerates at 6 m/s'at a green light. What is the car's force?
Answer:
Car's force is 12000 N.
Explanation:
→ Force = Mass × Acceleration
→ Force = 2000 kg × 6 m/s²
→ Force = 12000 NWHAT IS THE ANSWER TO DURING THE MOTION OF A WHEEL ALONG THE ROAD , VELOCTY HAS HOW MANY COMPONENTS CHOOSE ( 1,2,3) OR (ANY NUMBER)
Explanation:
The car's rate of change of position is decreasing. The car is moving but its rate of position increase is coming down. The car will eventually come to a brief stop and begin traveling backward.
6. An excited dog runs full-speed toward his owner who has just returned home from
school. If he runs north along their driveway for a distance of 45 m and takes 5.2 s to get
there, what is his average velocity?
Please answer in comments with work !!:)
Answer:
v = 8.65 m/s
Explanation:
Given that,
Distance covered by the doge, d = 45 m
Time taken, t = 5.2 s
We need to find its average speed. The total distance covered divided by the total time taken is called the average speed of an object. So,
[tex]v=\dfrac{45\ m}{5.2\ s}\\\\=8.65\ m/s[/tex]
So, the average speed is 8.65 m/s.