If it were not for air resistance, why would it be dangreous to go outdoors on rainy days?

Q: repulsive force between

A:

Q: ropped from a height of 6 meters. On each rebound it rises 2/3 of the height from which it last…

A: GivenA golf ball is dropped from a height of 6 meters

Q: Why is overall stopping distance for cars less than lorries

A: Stopping distance depends on , frictional force acting on the tire by the ground. Normally it does…

Q: What is dissipative force?

A: Forces that cause energy to loss in a system when a system undergoes a motion.

Q: Why Is It Difficult To Climb Up A Greasy Pole?

A: Grease decreases the friction between the surfaces in contact. While climbing up the pole, a person…

Q: If it were not for air resistance, why would it be dangerous to go outdoors on rainy days?

A: Air resistance causes the speed of the body to slow down.

Q: Why do you think seat belt is important? Relate this to physics

A: Newton's first law of motion : Newton’s first law states that if a body is at rest or moving at a…

Q: Walking on horizontal slippery ice can be much more tiring than walking on ordinary pavement. Why?

A: Introduction: A frictional force always acts opposite to the direction of motion if the surface has…

Q: A helicopter pushes air down, which in turn pushes the helicopter up. Which force affects the…

A: When the fans of the helicopter rotates, it pushes air down.  As the air is pushed down, due to an…

Q: In synchronized diving, divers remain in the air for the same time. With no air drag, they would…

A: In an appreciable air drag, the divers, in synchronized diving remain together in a fall. The divers…

Q: How much force does a 15-kg leg exert during running if the person has a 2-m stride and runs at a…

A: Mass of the leg (m) = 15 kg Speed (v) = 8 m/s Energy = 1/2 m v2  .       E = (1/2 )× 15 × (8)2…

Q: When you release an inflated but untied balloon, why doesit fly across the room?

A: The untied balloon flies across the room because of the momentum carried by the air present inside…

Q: An object at rest may have __________. hint:g=10m/s/s. a. speed b. velocity c. acceleration…

A: An object at rest does not have speed or acceleration.

Q: Cu le fate the wors required debe elone te otopa com of 1500 kg moring at a veloity of Go Kmlh ĭ

A: Given data :               Mass of car  =  m              Velocity of  car  =  v                To…

Q: Why is it that when you are climbing up a wall, you pull down on a hold to move upward?

A: yes, From newton 3rd law of motion which state that for every action there is equal and opposite…

Q: Where do you weigh more—at the bottom of Death Valley or atop one of the peaks of the Sierra Nevada?…

A: Weight of an object is the gravitational force experienced by the object.

Q: How does the average number of drops required to break open awhelk depend on platform height for a…

A: The average number of drops required to break open a whelk depends on platform height.

Q: What is escape speed?

A: When a body is thwon upward away from the surface of the earth, it goes upto a maximum height and…

Q: I want to check the answers of this question especially when does the weight first reach its maximum…

A:

Q: If two -6 uC experience a force of 0.03 C/m, how far are they from one another?

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Q: How much force acts on a tossed coin when it is halfway to its maximum height? How much force acts…

A: Answer:-  When the force acts on a tossed coin that has reached halfway its maximum height is 50%.…

Q: Ace of 128 N acts on a for 0.45 The ball i inituly at rest. Deterine the fral nomem of the ball

A: Given: Force F = 128N Time Δt = 0.45s Vi = 0m/s

Q: When you push horizontally on a crate on a level floor that doesn’t slide, how great is the force of…

A:

Q: Why is a Ping-Pong ball kept in midair by a vertical jet of air?

A: As per Bernoulli’s equation, a moving vertical jet of air causes a low pressure region. So, the…

Q: If a car traveling at 60 km/h will skid 20 m when its brakes lock, how far will it skid if it is…

A:

Q: A massive stone and a stone of one-half the mass are dropped from a tall building at exactly the…

A: The equation for the time taken by an object dropped from a height to reach the ground is given by,

Q: air resistance they encounter.

A: Air resistance is a force that is caused due to air when an object moves through it. This force acts…

Q: Why sand is thrown on the tracks covered with snow?

A: If the tracks are covered with snow then there is a substantial reduction in frictional force…

Q: In a wind tunnel test, the lift force measured by the dynamometer is of 40kg at 10m/s. what will be…

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Q: A 3 KG hammer is 0.4m high. What is it’s PE? What is it’s KE?

A: Potential energy is given byP.E=mghwherem=mass of objectg=acceleration due to gravityh=height of…

Q: Was it easier to push a fist into the bag with no water or into the bag with water?

A: Answer We can move easily through air than through water. If the road is full of water we can't…

Q: When jumping from a significant height, why is it advantageous to land with your knees bent?

A: Newton’s law says that rate of change in momentum is directly proportional to the force applied.…

Q: 0.14 kg baseball is d eight of 2.0 m above agnitude of its mome ound if we neglect a

A: Given that  Mass (m)=0.14 kg height (h)=2m Determine magnitude of momentum just before it hits…

Q: What is the benefit of an airbag, according to your understanding of physics?

A:

Q: If a 1 kg ball and a 5 kg ball of the same size are dropped from a height of 3 m at the same tims…

A: The air resistance of a falling object depends on the area of the cross-section. Therefore more the…

Q: Which requires more food per body weight daily: an elephant or a mouse?

A: For a mouse, there is a greater amount of radiating area per kg of body weight, compared to an…

Q: A stone is dropped from the edge of a cliff and hits the ground below in 3 s. The hight of the cliff…

A: Given data:  Initial velocity (V0) = 0 m/s Time (t) = 3 s Required: Height of the cliff

Q: What effect does air resistance have on falling objects?

A: Air resistance imparts a force that opposes motion in falling objects . So acceleration throughout…

Debye Theory of Solids

In solid-state physics, debye theory is used to estimate the phonons contributing to the specific heat capacity in a solid. It explains that the specific heat is a consequence of the vibrations of the atomic lattice of the solid, which is in contrast to the Einstein model. In the Einstein model, solids are treated as independent, non-interacting quantum harmonic oscillators. This model clearly explains the low-temperature dependence of the heat capacity, which is proportional to T3. This is known as Debye T3 law.