Answer:
(a). The angular speed of the rotating is 33.8 rad/s.
(b). The speed of its center is 2.7 m/s.
Explanation:
Given that,
Radius = 8.00 cm
Mass = 0.180 kg
Height = 75.0 m
We need to calculate the angular speed of the rotating
Using conservation of energy
Here, initial velocity and angular velocity are equal to zero.
Here, 
The angular speed of the rotating is 33.8 rad/s.
(b). We need to calculate the speed of its center
Using formula of speed
Put the value into the formula
Hence, (a). The angular speed of the rotating is 33.8 rad/s.
(b). The speed of its center is 2.7 m/s.
Answer:
Planet will crash on to the Sun if the tangential velocity becomes zero and Rocket should be fired from Earth's orbit is at 30 m/s and in opposite direction to the Earth orbits the Sun
Explanation:
The orbital velocity of the Earth about the sun is 30 km/s. If we shoot a rocket with 30 km/s with respect to Earth in the opposite direction. Then the two velocity vectors cancel. The resultant velocity would be zero with respect to the Sun. resulting velocity is called as tangential velocity.
Planet will crash on to the Sun if the tangential velocity becomes zero and Rocket should be fired from Earth's orbit is at 30 m/s and in opposite direction to the Earth orbits the Sun
Answer:
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Explanation:
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Heat energy required to increase the temperature of water in bathtub is 12,546,000 Joules.
<h3>What is thermal energy?</h3>
The energy contained by an object by virtue of heating is known as thermal energy.
Given is the mass of water m = 150 kg, Temperature change ΔT = (40 -20)= 20 °C
The specific heat of water Cp =4182 J/kg.°C
Heat transfer Q =m x Cp x ΔT
Q = 150 x 4182 x 20
Q = 12,546,000 J
Thus, Heat energy required to increase the temperature of water in bathtub is 12,546,000 Joules.
Learn more about thermal energy.
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Answer:
electrons can be knocked loose from one object and picked up by the other. The object that gains electrons becomes negatively charged, while the object that loses electrons becomes positively charged.
