Answers
Answer:
True
Explanation:
Lunar eclipse occurs when the Sun, the Earth and the Moon align in a straight line. The Earth blocks the sunlight falling on moon. In this alignment, the moon is in full phase. During solar eclipse, the moon passes through the shadow of Earth. Lunar eclipse occurs always during full moon phase-when the Earth comes between sun and moon.
Hence, the given statement is true.
True. Lunar eclipses only happen when there is a full moon.
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What best describes the bromide ion that forms
Captain Kiddo is trapped inside a submarine. In order to escape, she first needs to open a heavy revolving door. a. Would be easier for her to apply all her force close to the axle of the door or as far away as possible from it?b. To finally get the hatch open she needs to grab hold of the wheel with her hands on opposite sides and rotate the wheel by exerting a force toward the top of the door on one side while exerting the same force towards the bottom of the door on the opposite side. Is there a net force applied on the wheel? Is there a net torque applied? Explain your answers
OFFERING 60 POINTS IF YOU CAN SHOW THE WORK!!!!A 1000 kg roller coaster begins on a 10 m tall hill with an initial velocity of 6m/s and travels down before traveling up a second hill. As the coaster moves from its initial height to its lowest position, 1700J of energy is transformed to thermal energy by friction.
If I am given a total capacitence of two capacitors, their capacitence togather is 22 F. What capacitence would the individual capacitors have if they are connected in parallel or connected in series.
Answers
Answer:
2258.4 m
Explanation:
Distance covered is a product of speed and time hence
s=vt where s is the displacement/distance covered, v is the speed and t is the time taken
s=24*94.1=2258.4 m
Therefore, the distance covered is 2258.4 m
Answers
Final answer:
Given the same initial linear speed, a solid ball, solid disk, and hoop will expend energy on both rotation and translation. The solid ball, having the lowest moment of inertia, uses the most energy for translation and, therefore, will travel the highest up an incline.
Explanation:
In the context of this problem related to physics, the deciding factor is the distribution of mass, which influences each object's moment of inertia. Objects set to roll tend to use energy in two ways: translation (moving along the incline) and rotation (spinning about their center). Moment of inertia essentially measures how much of the object's energy goes towards rotation.
For a solid ball, solid disk, and hoop with the same mass and radius, the hoop has the highest moment of inertia with all of its mass at the maximum distance from the center. Followed by the solid disk, with its mass spread evenly from the center to its edge. Lastly, the solid ball has the lowest moment of inertia as its mass is concentrated towards the center.
This means that, given the same initial linear speed, the hoop will expend most of its energy on rotation rather than moving up the incline (translation). The solid disk will have a more balanced distribution between translation and rotation, and finally, the solid ball will use the least amount of energy on rotation and the most on translation. As such, the solid ball will go the farthest up the incline.
Learn more about the Physics of Rotating Objects here:
#SPJ3
Answers
In same manner, cold body will take the heat, and it's temperature will increase
Hope this helps!
Answers
Answer:
F = 10.8N
Explanation:
Given the mass m = 0.4kg, v1 = 25m/s, v2 = 12m/s and t =0.5s
From Newtown's second law of motion the average force can be found. This law states that the product of the force experienced by a body and the time t of the force acting on the body is equal to the change in momentum of the body. Mathematically it can be stated as follows
F×t = m(v2 – v1)
F = m(v2 – v1)/t = 0.4(25 – 12)/0.5 = 10.8N
Answers
Answer:
The height is
The kinetic energy during collision is not conserved
The Mechanical energy during the collision is not conserved
The mechanical energy after the collision is not conserved
Explanation:
From the question we are told that
The mass of the block is
The mass of the wad of putty is
The speed o the wad of putty is
The law of momentum conservation can be mathematically represented as
Where is the initial momentum which is mathematically represented as
While is the initial momentum which is mathematically represented as
Where s the final velocity
So
Making the subject
substituting values
According to the law of energy conservation
Where KE is the kinetic energy of the system which is mathematically represented as
And PE is the potential energy of the system which is mathematically represented as
So
Making h the subject of the formula
substituting values
Now the kinetic energy is conserved during collision because the system change it height during which implies some of the kinetic energy was converted to potential energy during collision
The the mechanical energy of the system during the collision is conserved because this energy consists of the kinetic and the potential energy.
Now after the collision the mechanical energy is not conserved because the external force like air resistance has reduced the mechanical energy of that system
Answers
Answer:
1.57 kW
Explanation:
The rate of heat loss is given by:
q = Gm * Cp * (tfin - ti)
Where
q: rate of heat loss
Gm: mass flow
Cp: specific heat at constant pressure
The Cp of air is:
Cp = 1 kJ/(kg*K)
The mass flow is the volumetric flow divided by the specific volume
Gm = Gv / v
The volumetric flow is the air speed multiplied by the cruss section of the duct.
Gv = s * h * w (I name speed s because I have already used v)
The specific volume is obtained from the gas state equation:
p * v = R * T
60 C is 333 K
The gas constant for air is 287 J/(kg*K)
Then:
v = (R * T)/p
v = (287 * 333) / 100000 = 0.955 m^3/kg
Then, the mass flow is
Gm = s * h * w / v
And rthe heat loss is of:
q = s * h * w * Cp * (tfin - ti) / v
q = 5 * 0.25 * 0.2 * 1 * (54 - 60) / 0.955 = -1.57 kW (negative because it is a loss)