5. A cycle accelerates from rest at a constant acceleration of 0.4m/s/s for 20 seconds then
stops pedalling and slowed to standstill at constant deceleration over distance of 260m.
Calculate:
a. Distance travelled by cyclist in the first 20seconds
b. The speed of the cyclist at end of this time
Answer: oh my. I just had the answer in my head but its gone now
Explanation:
a track player swings a 1.5 kg discus around at an arm's length of .8 m. if the discus is traveling at 3.0 m/s, what is its angular momentum?
Answer:
3.6 kg*m^2/s
Explanation:
The angular momentum equals mvr, where m is the mass, v is the velocity, and r is the radius or rotational arm. Inputting these values, we can find the angular momentum.
Angular momentum = (1.5 kg)(3.0 m/s)(0.8 m) = 3.6 kg*m^2/s
I hope this helps! :)
Answer:
3.6 kg is the answer
Explanation:
becuase 8/3 = 3.6
What is one watt ? Write the relation of watt with kilowatt , megawatt , and horsepower .
Answer:
See the explanation below
Explanation:
The watt (the power) is equal to the relationship between the work and the time in which that work is performed.
[tex]P = W/t[/tex]
where:
W = work [J] (units of Joules)
t = time [s].
Now 1000 [W] are equal to 1 [kW]
And 1000000 [W] are equal to 1 [MW]
The horsepower is the unit of power in the imperial system of units.
And 745.7 [W] are equal to 1 [Hp]
A golfer strikes a golf ball with an initial velocity of 50 m/s at an angle of 35° to the horizon.
Calculate initial. X velocity
Calculate initial. Y velocity
Answer:
for X, it's 50 times cos 35.
for y, it's 50 times sin 35.
1. A 146 kg cubic tiger began with an initial velocity of -22 m/s [N] and, while moving away from the origin, accelerated at -0.43 m/s² [N] and moved -407 m [N]. What was the final velocity of the tiger?
Answer:
v = 28.87 m/s
Explanation:
Given that,
Mass of a cubic tiger, m = 146 kg
Initial velocity, u = -22 m/s
Acceleration, a = -0.43 m/s²
Distance moved, s = -407 m
We need to find the final velocity of the tiger. Using third equation of motion to find it. Let v is the final velocity of the tiger.
[tex]v^2-u^2=2as\\\\v^2=(-22)^2+2\times (-0.43)\times (-407)\\\\=28.87\ m/s[/tex]
So, the final velocity of the tiger is 28.87 m/s.
In the circuit shown above, the current through the ammeter is 20 mA and the voltmeter indicates 1.0 V. What is the current through the 40 resistor?
A. 7.5mA
B. 10mA
C. 20mA
D. 40mA
Answer:
20mA
Explanation:
because it is connected in series with the ammeter
The current through the 40Ω resistor in the given circuit is 20mA, which is explained below.
Current through the resistors:The volate across resistor R is 1V, as indicated by the voltmeter.
Since the potential of the battery is 3V, according to Kirchoff's voltage law, the voltage drop across 20Ω resistors must be 1V each since they are indentical.
Let a total current I passes through 20Ω resistor as it is connected to the battery in series. From Ohm's law:
20Ω × I = 1V
I = 50mA
Now the current indicated by the ammeter is 20mA which splits according to the reistors of 15Ω and 30Ω which are connected in parallel. Then again the current adds up to 20mA when leaving the set of parallel resistors, through the 40Ω resistor.
So the current through the 40Ω resistor is 20mA
Learn more about Kirchoff's voltage law:
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Pretend you are explain net force to someone much younger than you. Explain how to calculate net force and how the net force determines the object’s motion.
Answer:
you can tell them it is the amount of "push" on an object then you can explain using a soccer ball being kicked or a cart being pushed
Explanation:
which of the following equals the change in velocity divided by the time?
A. acceleration
B. Speed
C. momentum
D.displacement
Answer:
Acceleration.
Explanation:
Hope this helped!
A cow pushes down on the ground in a field. What is the reaction force?
Answer:
The ground pushes back.
Explanation:
In Claudia’s investigations, she prefers to use DNA evidence whenever she can. Why is this MOST likely to be her preference?
DNA evidence is a reliable evidence that can establish individuality to a person.
No two persons can have similar DNA thus DNA evidence provides identity to a person. DNA evidence can be extracted from biological materials like hair, blood, semen, sweat, bone, tooth pulp, and skin. Therefore, DNA is mostly preferred as evidence.Learn more about DNA:
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Which term is described as a wave that is not confined to the space along the medium?
tsunami
standing wave
traveling wave
breaking wave
(there will be more Q's about this :\ )
Answer: Traveling wave
Explanation:
if bananas are curved because they grow towards the sun ☀️so say if a was born towards the sun would i have been a curved baby or what
ಠ_ಠ Hey, hang on.. you might've made a discovery. Nobody has tested it so how do we know? ಠ_ಠ
Answer:
It's because of the sun! Bananas are curved so they can retrieve sunlight. Bananas go through a process called 'negative geotropism'. ... So, bananas do not grow directly towards the sun rays but grow upwards to break through the canopy.
Can someone please help me with my physics hw
Which was not listed as a hazard of mining.
Answer:
look you didnt put none up there
Why does the height of the second hill effect the ability of the coaster to go safely around the loop?
This PE I need help real quick
Answer:
Muscular helps you move while Cardiovascular helps you breathe, not move. Hope this helps, I tried my best :)
Explanation:
Muscular endurance relates to how your body is able to move, your muscles.
Cardiovascular is how your body supplies blood and helps you breathe, (an organ in this system is heart) :)
SOMEONE PLEASE HELP!!
a car is sitting on top of a hill it is 7500 kg the hill is 100m high how much potential energy does the car have
a. 0.01 J
b. 75 J
c. 7,350,000 J
d. 37,500,000 J
Hello!
[tex]\large\boxed{\text{C. 7,350,000 J}}[/tex]
Use the equation:
[tex]PE = mgh[/tex]
Where:
m = mass of the object (kg)
g = acceleration due to gravity (≈9.8 m/s)
h = height above ground (m)
Plug the given values into the equation:
PE = 7500 · 9.8 · 100
PE = 7,350,000 Joules.
Part of a bird's digestive tract, called a gizzard, is able to break up large chunks of food at an extremely fast rate. It is difficult for
scientists to watch a gizzard functioning in a live bird. How would building a model of a gizzard help a scientist?
A. to analyze how a gizzard works
В.to study bird behavior
C.to determine what type of tissues a real gizzard is made of
D.to watch a gizzard functioning in life
Answer:A:
To analyze how a gizzard works.
Explanation:
a bud travels 20 km in 30 minutes what is the average speed of the bus
Which of the following is an example of Potential Energy?
A Bell Ringing
An apple on a tree branch
Taking X-rays
Lightning
what is the net force of an object that has 7N to the left and right and 3N up
Answer:
the net force would be 3N in the upward direction since the two forces acting on the left and right of the object cancel out.
Explanation:
difference between of echo and reverberation
Answer:
A difference between of echo and reverberation is described below in details.
Explanation:
Here's a piece of immediate information: An echo is an individual consideration of a soundwave off a horizon exterior. Reverberation is the consideration of sound waves generated by the superposition of the before-mentioned echoes. ... A reverberation can happen when a sound wave is displayed off a nearby covering.
A 2100 lb (1 kg=2.2 lbs) car is using 4500 N of traction in order to move with a constant
velocity of 67 mph (29.8 m/s). What is the acceleration of this 9300 N vehicle?
Answer:
[tex]a = 0\ m/s^2[/tex]
Explanation:
The acceleration of a body is defined as the change in velocity of an object, with respect to time. So, in order to produce and acceleration in any object, the velocity of that object must change. And, if the velocity of the object is not changing with respect to time, then the object is said to have a uniform motion. The acceleration of the object in such uniform motion is always zero. Because the change in velocity is zero.
[tex]acceleration = change in velocity/time\\acceleration = 0 / time\\acceleration = 0 m/s^2[/tex]
Since, the car in this case is moving with a constant speed. Therefore, its acceleration will also be zero.
a = 0 m/s²
Three identical blocks, x, y, and z hang from identical strings
Answer:
Following are the solution to this question:
Explanation:
Please find the complete question and its solution in the attached file.
Help? anyone? plz?
What was the atmosphere most heated by?
radiation
conduction
wind
convection
Answer:
Explanation:
The answer is radiation.
Dylan is set to receive a football kickoff. After being kicked, the ball goes up to a height of 55m before starting back down. How much time does he have before the ball comes back down?
Answer:
Explanation:
Answer:
There was no anwser
Explanation:
because dylan did not anwser
What's the frequency of a wave with a wavelength of 10 and velocity of 200m/s?
Answer:
[tex]\boxed {\boxed {\sf 20 \ Hz}}[/tex]
Explanation:
The frequency of a wave can be found using the following formula.
[tex]f=\frac{v}{\lambda}[/tex]
where f is the frequency, v is the velocity/wave speed, and λ is the wavelength.
The wavelength is 10 meters and the velocity is 200 meters per second.
1 m/s can also be written as 1 m*s^-1Therefore:
[tex]v= 200 \ m*s^{-1} \\\lambda = 10 \ m[/tex]
Substitute the values into the formula.
[tex]f=\frac{200 \ m*s^{-1}}{10 \ m}[/tex]
Divide and note that the meters (m) will cancel each other out.
[tex]f=\frac{200 \ s^{-1}}{10 \ }[/tex]
[tex]f=20 \ s^{-1}[/tex]
1 s^-1 is equal to HertzTherefore, our answer of 20 s^-1 is equal to 20 Hz[tex]f= 20 \ Hz[/tex]
The frequency of the wave is 20 Hertz
A force of 10N is making an angle of 300 with the horizontal. Its horizontal components will be
Answer: 5N
Explanation:
Horizontal component is the force that is applied as a result of the diagonal application of force.
here in this case,
given diagonal force =10N.
angle= 30°
horizontal component is found using trigonometry..
so,
A vector of magnitude 10 N is provided.
It is at an angle of 30° to the + x axis.
To find:
The components along the x and y axis.
Calculation:
Along x axis:
F(x) = F cos(θ)
=> F(x) = 10 × cos(30)
=> F(x) = 10 (√3/2) = 5√3N
Along y axis:
F(y) = F sin(θ)
=> F(y) = 10 sin(30°)
=> F(y) = 10 × ½
=> F(y) = 5 N.
Additional information:
1. A vector is a quantity that can be defined with both magnitude and direction.
2. Since force is a vector, we are able to break it down into components along chosen axis.
Distinguish between converging lens and diverging lens
Answer:
Converging lenses are lenses which converge the light rays coming towards them, whereas diverging lenses are lenses which diverge the rays coming towards them.
Converging lenses form a real image, whereas diverging lenses form a virtual image
Explanation:
What happens to electrical energy that is used by objects in our homes? (1 point) a It is absorbed by batteries. b It is destroyed. c It is stored in solar panels. d It is transformed into other forms of energy.
Question:
What happens to electrical energy that is used by objects in our homes? (1 point)
a It is absorbed by batteries.
b It is destroyed.
c It is stored in solar panels.
d It is transformed into other forms of energy.
Answer:
D
d. It is transformed into other forms of energy.
When electrical energy is used by objects in our homes, it is transformed into other forms of energy depending on the specific device or appliance. For example:
In light bulbs, electrical energy is transformed into light energy and heat energy.In an electric heater, electrical energy is transformed into heat energy to warm the surroundings.In a blender, electrical energy is transformed into mechanical energy to blend food.In a fan, electrical energy is transformed into mechanical energy to create air movement.This transformation of electrical energy into other forms is governed by the principles of conservation of energy, which state that energy cannot be created or destroyed, only converted from one form to another. So, while electrical energy is consumed and "used up" by the devices in our homes, it is not destroyed but rather converted into different forms of energy that serve various purposes.
To learn more about electrical energy, here
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