Answers
Answer:
It will take 33 seconds to stop the car.
Explanation:
Using the first equation of kinematics we have
where
'v' is final speed of object
'u' is initial speed of object
'a' is acceleration of object
't' is time of acceleration of object
Now since it is given that since acceleration is negative and
We know that the object will stop when it's velocity reduces to zero hence in the equation above setting v = 0 we get
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n a distant solar system, a planet of mass 5.0 x 1024 kg orbits a sun of mass 3.0 x 1030 kg at a constant distance of 2.0 x1011 m. How many earth days does it take for the planet ot execute one complete orbit about the sun
A thin flashlight beam traveling in air strikes a glass plate at an angle of 52° with the plane of the surface of the plate. If the index of refraction of the glass is 1.4, what angle will the beam make with the normal in the glass?
Which of the following organisms has an adaptation that will allow it to survive in tundra biome? *A.)Plants with roots that are short and grows sideways with hairy stems and small leaves.B.)Plants that have broad leaves to capture sunlight and long roots to penetrate the soil.C.)Animals with thin fur that allows them to get rid of heat efficiently.D.)Animals with long tongues for capturing prey and sticky pads for climbing trees.
Answers
Answer:
The energy stored is
Explanation:
From the question we are told that
The capacitance is
The resistance is R = 3.00-Ω
The emf is
The power is P = 300 W
Generally the total emf is mathematically represented as
Here is the emf across that capacitor which is mathematically represented as
and is the emf across the resistor which is mathematically represented as
So
=>
Generally the energy stored in a capacitor is mathematically represented as
=>
=>
=>
Final answer:
The energy stored in the capacitor is 0 J.
Explanation:
When a 8.00-μF capacitor that is initially uncharged is connected in series with a 3.00-Ω resistor and an emf source with E = 70.0 V
At the instant when the resistor is dissipating electrical energy at a rate of 300 W, we can calculate the current flowing through the circuit using Ohm's law: I = V/R = 70.0 V / 3.00 Ω = 23.33 A.
The energy stored in a capacitor can be calculated using the formula: E = 1/2 * C * V^2, where C is the capacitance and V is the voltage across the capacitor.
Since the capacitor is initially uncharged, the voltage across it is also zero. So the energy stored in the capacitor is 0.5 * 8.00 x 10^-6 F * (0 V)^2 = 0 J.
Learn more about Energy stored in a capacitor here:
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Where,
Qh: the absolute value (magnitude) of the heat absorbed from the hot reservoir during one cycle or during some time specified in the problem
Qc: the absolute value (magnitude) of the heat delivered to the cold reservoir during one cycle or during some time specified in the problem
W: the amount of work done by the engine during one cycle or during some time specified in the problem
A) e=QhW
B) e=QcQh
C) e=QcW
D) e=WQh
E) e=WQc
Answers
Answer:
Efficiency e = W/Qh
Explanation:
As written above efficiency of a system is calculated as the output per unit input. For heat Engine, Efficiency is calculated by dividing the Work done by Engine by Heat absorbed from hot reservoir.
In theoretical terms The maximum efficiency of a heat engine (which no engine ever attains) is equal to the temperature difference between the hot and cold ends divided by the temperature at the hot end, each expressed in absolute temperature (Kelvin).
But in practical calculations, it is calculated as e = W/Qh , and we define the thermal efficiency, of any heat engine as the ratio of the work it does, W, to the heat input at the high temperature, Qh.
Answers
Answer:
The period of the pendulum is
Explanation:
The diagram illustrating this setup is shown on the first uploaded image
From the question we are told that
The length of the rod is
The diameter of the ring is
The distance of the hole from the one end
From the diagram we see that point A is the center of the brass ring
So the length from the axis of rotation is mathematically evaluated as
Now the period of the pendulum is mathematically represented as
b. The tubing was unable to supply any more water to the tube for use.
c. The pressure outside the tube is higher that the water pressure inside the tube.
Answers
Answer:
a. The pressure in the tubing is equal to the barometric pressure.
Explanation:
Since in the question it is mentioned that the if you take the stoppert part of the tube than the level of warer would be fall approx 4th floor and if it is continued than it wont be continue but remains constant.
Now here first we do that the tube i.e. connected to the bucket should be taken up. In the first instance, the bucket supplies the water to the tube but it would not increased far away to the level of the barometric pressure
Hence, the correct option is a.
Answers
Answer:
6.2 seconds
Explanation:
Using Newton's second law, ∑F=ma, we know the net force acting on the object is Force applied-Force of friction. The net force is 203 N. Newton's second law requires the mass of an object, not the weight force, so we will have to calculate the mass. We know that m*g=weight force, in this case, solve for the mass and you will get 210 kg. Now that we have the value of the net force and the mass, we can solve for acceleration. =0.967 m/s^2. Now, since we have the acceleration, initial velocity(0 m/s), and the final velocity (6m/s) we will use these to solve for time using the kinematic equation Vf=Vi + at. Plug in the values we know and solve for time and you will get 6.2 seconds
Answers
Answer:
Trevor's taxi would cause higher levels of air pollution
Explanation:
Trevor's taxi use diesel oil.
Diesel is less cleaner than LPG.
Compared to automotive pollution from petrol and diesel, pollutants from LPG-driven cars include lower amounts of petroleum hydrocarbons, nitrogen oxides , sulphur oxides, ozone contamination and particulate matter.