The kinetic energy of an object is given by:
where m is the mass of the object and v its velocity.
The car in this problem has a mass of m=600 kg and a velocity of v=10 m/s, therefore if we put these numbers into the equation, we find the kinetic energy of the car:
Answer:
Explanation:
The intensity of a sound wave is given by
where
P is the power of the wave at the source
A is the area over which the sound wave propagates
In this problem, we have
P = 70.0 W is the power
We want to know the intensity at a distance of r = 25.0 m from the orchestra, so since the sound waves propagates radially, we must consider a spherical surface of radius r, so the area is
Therefore, the intensity of the wave is
A residual-current device (RCD), or residual-current circuit breaker (RCCB),
is a device that instantly breaks an electric circuit to prevent
serious harm from an ongoing electric shock. Injury may still occur in
some cases, for example if a human falls after receiving a shock. In the
United States and Canada, the device is more commonly known as a ground fault circuit interrupter (GFCI), ground fault interrupter (GFI) or an appliance leakage current interrupter (ALCI). In the United Kingdom, these are better known by their initials RCD, and a combined RCD+MCB (miniature circuit breaker) is known as a RCBO (residual-current circuit breaker with overcurrent protection). In Australia, they are sometimes known as safety switches or an RCD. In Malta they are sometimes known as salvavita, from the Italian term. An earth leakage circuit breaker (ELCB) may be a residual-current device, although an older type of voltage-operated earth leakage circuit breaker also exists.
Answer:
Both the pressure and temperature increase with depth inside the Earth.
Explanation:
The core of the Earth is as hot as the surface of the Sun. The temperature decreases as the distance from the core increases towards the surface of the Earth. The pressure also increases with the depth, though this is not a linear increase with depth. Refer below for variation of pressure with depth inside the Earth.