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3 years ago

When air pressure is lower what happens to a balloon filled with air

Physics

1 answer:

andriy [413]3 years ago

3 0

Answer: The balloon will expand.

Explanation: The pressure of the air inside the balloon will be greater than the air pressure outside of the balloon. This causes the balloon to expand.

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7) A force of 500N exists between two identical point charges separated by a dis-

ioda

Explanation:

f=500N

d=40cm=0.4m

$\sqrt{500 \times 500 + .4 \times .4}$

5 0

3 years ago

Read 2 more answers

A lorry of mass 12,000kg travelling at a velocity of 2 m/s collides with a stationary car of mass 1500kg. The vehicles move toge

Lubov Fominskaja [6]

Answer:

Approximately $1.8\; \rm m \cdot s^{-1}$ . Assumption: the friction between the two vehicles and the ground is negligible.

Explanation:

The momentum $p$ of an object is the product of its mass $m$ and its velocity $v$ :

$p = m \cdot v$ .

Momentum should be conserved in this collision if there's no external force on these two vehicles. In other words, the sum of the momentum of the lorry and the car should be the same before and after the collision.

Mass of the lorry: $m_1 = 12000\; \rm kg$ .

Velocity of the lorry right before the collision: $2\; \rm m \cdot s^{-1}$ .

Therefore, the momentum of the lorry right before the collision would be $12000\; \rm kg \times 2\; \rm m \cdot s^{-1} = 24000\; \rm kg \cdot m\cdot s^{-1}$ .

Mass of the car: $m_2 = 1500\; \rm kg$ .

Velocity of the car before the collision: $0\; \rm m \cdot s^{-1}$ .

Therefore, the velocity of the car before the collision would be $1500\; \rm kg \times 0\; \rm m \cdot s^{-1} = 0\; \rm kg \cdot m \cdot s^{-1}$ .

Sum of the momentum of the lorry and the car right before the collision:

$24000\; \rm kg \cdot m \cdot s^{-1} + 0\; \rm kg \cdot m \cdot s^{-1} = 24000\; \rm kg \cdot m \cdot s^{-1}$ .

Under the assumption that there is no external forces on the lorry and the car, the sum of the momentum of the lorry and the car right after the collision should also be $24000\; \rm kg \cdot m \cdot s^{-1}$ .

Let $v\; \rm m \cdot s^{-1}$ be the velocity of the lorry and the car after the collision. (The velocity of the two vehicles should be the same because they were moving together.)

Right after the collision, the momentum of the lorry (with a mass of $12000\; \rm kg$ ) would be ${12000\; {\rm kg} \times v\; \rm m \cdot s^{-1}} = 12000\, v \; \rm kg \cdot m \cdot s^{-1}$ .

Similarly, right after the collision, the momentum of the car (with a mass of $1500\; \rm kg$ ) would be ${1500\; \rm kg} \times v\; {\rm m \cdot s^{-1}} = 1500\, v\; \rm m \cdot s^{-1}$ .

The sum of the velocities of the two vehicles right after the collision would be:

$\left(12000\, v \; {\rm kg \cdot m \cdot s^{-1}} + 1500\, v \; {\rm kg \cdot m \cdot s^{-1}}\right)$ .

That quantity should match the momentum right before the collision. In other words:

${12000\; \rm kg \cdot m \cdot s^{-1}} = \left(12000\, v \; {\rm kg \cdot m \cdot s^{-1}} + 1500\, v \; {\rm kg \cdot m \cdot s^{-1}}\right)$ .

Solve this equation for the velocity of the two vehicles after the collision:

$\displaystyle v = \frac{12000}{12000 + 1500}\approx 1.8$ .

Therefore, the velocity of the two vehicles right after the collision would be approximately $1.8\; \rm m \cdot s^{-1}$ .

3 0

3 years ago

Match the following examples of energy with the primary form of energy exhibited.

GalinKa [24]

The primary energy exhibited is:

friction: Heat energy

Due to friction. there is heat loss in mostly all machines.

nuclear power plant: Nuclear energy

In nuclear power plant, fission or fusion of radio-active substances produces large amount of nuclear energy.

toaster element: Heat energy

Heat energy is produced in the toaster when electricity passes through the element. This is used to heat the toasts.

welding torch: Heat energy

The heat energy produced in the welding torch is used in welding.

eraser sitting on a desk edge: Potential energy

Potential energy is possessed by a body due to virtue of its height.

light bulb: Heat energy and light energy.

The element inside the bulb gets heated first and then light energy is produced.

campfire: Heat energy

Heat is produced and then light energy in case of campfire.

moving car: Kinetic energy

A moving body has kinetic energy.

lump of coal in a storage bin: Potential energy

A lump of coal in a storage bin has potential energy.

stick of TNT: potential energy

Stick of TNT is formed of explosive mixture. It contains potential energy.

3 0

3 years ago

Read 2 more answers

What is the acceleration of a rocket if 200 Newtons are applied to its 5.5 kg

snow_tiger [21]

Given
Force=200N
Mass=5.5kg

F=ma
a=F/m=200/5.5=38.18metre per second

7 0

3 years ago

This refers to the ability of the joints to move through a full range of motion

Sati [7]

Answer:

Flexibility is the ability of a joint or series of joints to move through an unrestricted, pain free range of motion. ... These soft tissues include: muscles, ligaments, tendons, joint capsules, and skin.

Explanation:

3 0

2 years ago