Answer:
π/10 rads
Explanation:
It takes an hour (60 minutes) for the minute's hand to turn a full circle or achieve an angular rotation of
2πl rad.
Now, number of periods of 3 minutes in an hour is;
Number of periods = 60/3 = 20 periods
Thus, 3 minutes rotation accounts for 1/20 of 2π the rotation of the minute's hand in an hour.
Thus;
Angular displacement = (1/20) * 2π = π/10 rads
A 3-V adaptor using a half-wave rectifier must supply a current of 0.5 A with a max- imum ripple of 300 mV. For a frequency of 60 Hz, compute the minimum required smoothing capacitor.
The minimum required smoothing capacitor is determined as 27.8 mF.
Minimum required smoothing capacitor
The minimum required smoothing capacitor is calculated as follows;
Ripple amplitude is given as;
[tex]V_R = \frac{I_L}{C_1f_{in}}[/tex]
where;
VR is maximum ripple voltagef is frequencyC1 is smoothing capacitorI is current[tex]C_1 = \frac{I_L}{V_Rf_{in}}\\\\C_1 = \frac{(0.5)}{(300 \times 10^{-3})(60)} \\\\C_1 = 0.0278 \ F\\\\C_1 = 27.8 \ mF[/tex]
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Work is always done when
an object moves
an object has potential energy
a force moves an object
a force is applied perpendicular to the direction of the object's motion
why would north america will not be able to view the eclipse
The North America will not be able to view the eclipse because of its location on the earth caused by the tilting of the earth.
Effect of tilting of the EarthThe tilt of the Earth is what causes seasons to occur. These are the seasons in relation to the Northern Hemisphere.
The tilting of the Earth causes the difference in the amount of sun reaching each region of the earth like in the North America continent.
Thus, the North America will not be able to view the eclipse because of its location on the earth caused by the tilting of the earth.
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Electric Resistance measured in?
Answer:
ohms
Explanation:
because it deal with circuit
Electric resistance is measured in Ohms.
What is an Electric resistance?A electric resistance can be defined as the opposition to current flow in a conductor.
From ohms law, an electric resistance can be determined using the formula below.
Formula:
V = IR.............. Equation 1Where:
V = VoltageI = CurrentR = Electric resistanceAlso,
V is measured in VoltsI is measured in AmpereR is measured in Ohms.Hence, Electric resistance is measured in Ohms.
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In one day, a large tree sheds 82 gallons of water through its leaves into the atmosphere. how many cubic meters of water is this?
Answer:
0.372779 cubic meters
Explanation:
Answer:
.3104 m^3
Explanation:
1 gal (US) = .00378541178 m^3
A 45. 5-g super ball traveling at 27. 5 m/s bounces off a brick wall and rebounds at 21. 0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3. 30 ms, what is the magnitude of the average acceleration of the ball during this time interval?.
The magnitude of the average acceleration of the ball during this time interval will be 1969.69 m/s².
What is acceleration?The rate of velocity change concerning time is known as acceleration.
Given data;
Initial velocity, u= 27.5 m/s
Rebound velocity, v= 21.0 m/s
Time elapsed, t = 3.30 × 10⁻³ seconds.
To find ;
Average acceleration, a
The average acceleration when the change in velocity is observed by the formula as:
[tex]\rm a_{avg}= \frac{v-u}{t}[/tex]
Substitute the given values:
[tex]\rm a_{avg}= \frac{27.5-21.0}{3.30 \times 10^{-3}} \\\\ a_{avg}= 1969.69 \ m/s^2[/tex]
Hence, the magnitude of the average acceleration of the ball during this time interval will be 1969.69 m/s².
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How many degrees is the maximum and minimum variation between the true and magnetic poles?
The maximum and minimum variation between the true and magnetic poles is 180 degrees and 0 degrees respectively.
What are the true and magnetic poles?The poles of the earth are the North and South poles.
The North is taken as the reference point.
The true north is a fixed point on the globe and gives the true North and South poles.
The Magnetic north is the direction that a compass needle points to as it aligns with the Earth's magnetic field and gives the magnetic North and South poles.
The maximum maximum and minimum variation between the true and magnetic poles is 180 degrees and 0 degrees respectively.
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Explain an example of an object moving in projectile motion.
An example of an object moving in projectile motion is; A basketball being thrown into a net.
What is an example of a Projectile Motion?Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity.
Now, an example of an object moving in a projectile motion is throwing a basketball into a basketball net in a game. This is because the ball is thrown into the air at an angle towards the net and as such is subject to only acceleration of gravity.
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If a BASEBALL is traveling in projectile motion, in what direction is it going?
The direction the BASEBALL which is traveling in projectile motion is going is called a parabola.
What is projectile motion?Projectile motion is the motion of an object launched into the air at an angle to the horizontal and allowed to fall freely under the effect of gravity.
The object is known as a projectile, and the path of motion is a curved path called a parabola.
Therefore, the direction the BASEBALL which is traveling in projectile motion is going is called a parabola.
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One year consists of 365 days. this is closest to how many seconds?
If one year consists of 365 days, this is closest to x = 3.15 × 10⁷ seconds.
What is the number of seconds in a year?
Given that;
Number of days in a year = 365Number of seconds in 365 days = ?Note that; there are 24 hours in a day, 1440 minutes in a day and 86400 seconds in a days.
1 day contains 86400 seconds
365 contains x seconds
x = 365 × 86400
x = 3.15 × 10⁷ seconds
Therefore, if one year consists of 365 days, this is closest to x = 3.15 × 10⁷ seconds.
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a 5200w electric oven
Answer:
104 kWh
Explanation:
To calculate the kWh you multiply power with the amount of hours.
So for this we take 5200 W × 20 = 104 000 Wh
Then change Wh to kWh so that makes 104 kWh
state advantages of ultrasonic sound in determining the depth of the ocean
Answer:
It has greater accuracy than other nondestructive methods in determining the depth of internal flaws and the thickness of parts with parallel surfaces.
Explanation:
Hope this helps you!
why do areas with low altitude have warmer air than areas with high altitude
Answer:
Air at higher altitude is under less pressure than air at lower altitude because there is less weight of air above it, so it expands (and cools), while air at lower altitude is under more pressure so it contracts (and heats up).
Explanation:
Hope that helped
Q1.
(a) Some students have designed and built an electric-powered go-kart. After testing, the
students decided to make changes to the design of their go-kart.
First design X
Final design Y
The go-kart always had the same mass and used the same motor.
The change in shape from the first design (X) to the final design (Y) will affect the top
speed of the go-kart.
Explain why.
Answer:Because if the shape gets changed it will move faster without to much weight
Explanation:
what is the index of the refraction?
Answer:
The value of index of refraction(n₂) is 1.26
Explanation:
look at the attachment above
Could you sky-dive on the Moon? Why or why not?
Answer:
no
Explanation:
the moon's force of gravity is not strong enough to pull you down compared to earth, so you will just float
HELP PLEASE!!! In the diagram, q1 = -6.39*10^-9 C and q2 = +3.22*10^-9 C. What is the electric field at point P? Include a + or - sign to indicate the direction. 91 92 P 0.150 m ** 0.250 m (Hint: The distance from q1 to P is NOT 0.150 m.) (Remember, E points away from + charges, and toward charges.) (Unit = N/C) HELP PLEASE!!
Answer:
E = K Q / R^2
E1 = K Q1 / R1^2 = K * (-6.39 E-9) / .4^2 = -K 39.9 E-9
E2 = K Q2 / R2^2 = K * 3.22 E-9 / .25^2 = K 51.5 E-9
Field will point to right of P since E2 (positive) stronger
E = K (E2 - E1) = 9.0 E9 * (51.5 - 39.9) E-9 = 104 N/C
The electric field at point P is 104.6 N/C.
What is meant by electric field ?Every place in space where a charge exists in any form has an electric attribute that can be defined as the electric field.
Here,
q₁ = -6.39 x 10⁻⁹C
q₂ = 3.22 x 10⁻⁹C
Distance from q₁ to P, d₁ = 0.4 m
Distance from q₂ to P, d₂ = 0.25 m
Electric field at P due to q₁, E₁ = k x -6.39 x 10⁻⁹/(0.4)²
E₁ = -39.9 x 10⁻⁹k N/C
Electric field at P due to q₂, E₂ = k x 3.22 x 10⁻⁹/(0.25)²
E₂ =51.52 x 10⁻⁹k N/C
Therefore, total electric field at P,
E = E₂ - E₁
E = (51.52 - 39.9) x 10⁻⁹k
E = 104.6 N/C
Hence,
The electric field at point P is 104.6 N/C.
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which is a barrier to the correct interpretation of what you hear?
The a barrier to the correct interpretation of what you hear can occur due to different frame of reference.
What is frame of reference?A frame of reference is a particular set of beliefs or ideas on which you base your judgment of things.
A barrier in the correct interpretation of information can occur when two observers are in different frames of reference.
Thus, the a barrier to the correct interpretation of what you hear can occur due to different frame of reference.
The complete question is below:
Which is a barrier to the correct interpretation of what you hear?
-Different frame of reference
-Dissimilar vocabulary
-Differing accent
-Jargon usage
-Poor explanation
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a protostar will continue to collapse due to gravity until it reaches the main sequence, and then gravitational collapse will stop when _____ begins.
a protostar will continue to collapse due to gravity until it reaches the main sequence, and then gravitational collapse will stop when fusion of hydrogen begins.
What is a protostar and how does gravity affect it?A protostar serves as a very young star which is very small in mass and still developing its mass from parent molecular cloud.
However, it can be affected by gravity because , when there is not collapse on the gravity, if there is fusion of hydrogen begins in it.
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Can someone PLEASE explain:
Average velocity = u + v / 2
(How do you find the initial and the final velocity in a situation)
. An object is dropped from a height of 75.0 m above ground level. (a)
Determine the distance traveled during the first second. (b) Determine
the final velocity at which the object hits the ground. (c) Determine the
distance traveled during the last second of motion before hitting the
ground.
a) 4.9 m
b) 38.3 m/s
c) 33.4 m
What are three equation of motion?The three equations are,
v = u + at
v² = u² + 2as
s = ut + ½at²
According to the question,
Let hold the y-axis in the direction of gravity.
Initial velocity 0 = 0 /,
Initial height ℎ0 = 0 , and finish height ℎ = 75.0
gravitational acceleration = 9.8 /²
a) Determine the distance traveled during the first second.
By third equation of motion
[tex]S_{0} = v_{0} t +\frac{1}{2} gt^{2}[/tex] where [tex]v_{0}[/tex] =0
then [tex]S_{0} = \frac{gt^{2}}{2} = \frac{9.8*1^{2} }{2} = 4.9 m[/tex]
b) Determine the final velocity at which the object hits the ground
let – velocity of object, when it falling to the ground
– moment falling to the ground, and obtain from condition:
ℎ = ℎ() = 75.0
[tex]v_{f} = v_{0} +gt = gt[/tex]
[tex]h (t_{f} ) = \frac{gt^{2} }{2} = 75.0 m\\t_{f} =\sqrt{\frac{2h_{f} }{g} } \\v_{f}= gt = g \sqrt{\frac{2h_{f} }{g} } =\sqrt{2hg_{f} }= =\sqrt{2*9.8*75.0} = 38.3 m/s[/tex]
c) Determine the distance traveled during the last second of motion before hitting the ground.
From the above equation we get,
[tex]\sqrt{2*75*9.8*1} - \frac{9.8*1^{2} }{2} = 38.3 -4.9 = 33.4 m[/tex]
Therefore,
a) 4.9 m is the distance traveled during the first second.
b) 38.3 m/s is the final velocity at which the object hits the ground
c) 33.4 is the distance traveled during the last second of motion before hitting the ground.
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5. On a hot summer day the grass feels cooler than the sidewalk, because
O
O
the grass has a higher specific heat
the grass has a smaller surface area
the sidewalk is at a higher temperature
Answer:
because the side walk is at high temperature
A glider with a mass of 2 kg is moving rightward at 1 m/s. A second glider, with a mass of 3 kg, is also moving rightward, at 5 m/s. After the two gliders collide, the first glider is moving rightward at 2 m/s. What is the velocity of the second glider after the collision
The velocity of the second glider after the collision is 4.33 m/s rightward.
Velocity of the second glider after the collision
Apply the principle of conservation of linear momentum;
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
where;
m₁ is mass of first gliderm₂ is mass of second glider u₁ is initial velocity of first glideru₂ is initial velocity of second gliderv is the final velocity of the gliders(2)(1) + (3)(5) = (2)(2) + 3v₂
17 = 4 + 3v₂
3v₂ = 17 - 4
3v₂ = 13
v₂ = 13/3
v₂ = 4.33 m/s
Thus, the velocity of the second glider after the collision is 4.33 m/s rightward.
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If a liquid has a density of 1.67 g/cm^3, what is the volume of 45g of the liquid?
Answer:
V = 26.95 cm³
Explanation:
Density is given by the formula :
ρ = m÷V
Density = mass ÷ Volume
Given both density and mass we rearrange, substitute and solve for Volume :
Rearranging the equation to make Volume the subject :
ρ = m÷V
ρV = m
V = m÷ ρ
Now substitute :
V = 45 ÷ 1.67
V = 26.9461077844
Take 2 decimal places as the density is 2 decimal places :
V = 26.95
Units will be cm³ as it is volume
Hope this helped and have a good day
Use the image to determine the volume of the rock.
Answer:
12 ml
Explanation:
The initial volume in the cylinder is 20 ml
adding the rock adds volume to the cylinder
the new volume is 32 ml .....the increase in volume is the volume of the rock : 32 - 20 = 12 ml volume of rock
vector a→ has a scalar components ax=35 m/s and ay=15 m/s. vector b→ has a scalar components bx=−22 m/s and by=18 m/s. determine the scalar components of vector c→=a→−b→
The scalar components of vector c are:
cx = 57 m/scy = -3 m/s.How to find the difference between the vectors?
Here we have the vectors:
a = <35m/s, 15m/s>
b = <-22 m/s, 18 m/s>
And we want to find the difference, which is given by:
c = a - b = <35m/s, 15m/s> - <-22 m/s, 18 m/s>
The difference is computed component by component, so we get:
c = <35m/s + 22m/s, 15m/s - 18m/s>
c = <57 m/s, -3 m/s>
Then the scalar components of vector c are:
cx = 57 m/s
cy = -3 m/s.
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Banked Curves: A 600-kg car is going around a banked curve with a radius of 110 m at a steady speed of 24.5 m/s. What is the appropriate banking angle so that the car stays on its path without the assistance of friction
The angle of baking from the calculation is obtained as 30°.
What is banking?The term banking refers to a means of preventing vehicles from skidding off the road at curves.
We know that the banking angle is obtained from;
θ = tan-1(v^2/rg)
v = 24.5 m/s
r = 110 m
g = 9.8 m/s^2
θ = tan-1(25^2/9.8 * 110)
θ = tan-1(625 /1078)
θ = 30°
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Two friends leave a movie theater and take different busses to the same ice cream shop. one bus takes a longer route driving on a high-speed highway, while the other takes a shorter route on lower-speed local roads. which friend has the greater displacement?
The friend who has the greater displacement is the one who takes the longest path.
What is displacement?The displacement is the shortest distance travelled by the particle. It is the vector quantity which re[presents both the magnitude and direction.
Given, two friends leave a movie theater and take different buses to the same ice cream shop. One bus takes a longer route driving on a high-speed highway, while the other takes a shorter route on lower-speed local roads.
According to the definition. the displacement is neither larger not shorter but it is the shortest distance traveled by the person or particle.
Thus, friend who has longer path has larger displacement.
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Explain how the scenario below illustrates a lack of understanding of the importance of quality control.
Situation: Tomas is the manager of a local restaurant.
Tomas: “The health inspection department is too strict. We have to leave some cold foods out to prepare salads for lunch.”
Answer:
He is being careless.
Explanation:
he is trying to "get rid" of one problem so he can tackle another. This is food though, and you have customers to serve. You also have to be careful about food poisoning.
Two liquids A and B of relative densities 0.7 and 0.4 respectively are mixed with water, kl. How will the mixture. arrangement occur in a given container?
The liquid A is present lower in the container as compared to liquid B due to more weight.
How will the mixture. arrangement occur in a given container?If two liquids A and B of relative densities 0.7 and 0.4 respectively then the lower density liquid remain at the top and higher density solution which is liquid A remains lower in the container because higher density solution has more weight.
So we can conclude that the liquid A is present lower in the container as compared to liquid B due to more weight.
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