purplemammoth186

The wave speed on a string under tension is 250 m/s. what is the speed if the tension is halved?

A 15.0kg box at rest has 250.J of work done on it. How fast is it going?

Two boats leave the shore at the same time to take supplies to neighboring islands. One of the boats returns every 45 minutes. The other boat returns every hour. How long will it take for the two boats to return at the same time?

Tension is maintained in a string as in Figure P13.57. The observed wave speed is v = 24.0 m/s when the suspended mass is m = 3.00 kg. (a) What is the mass per unit length of the string? (b) What is the wave speed when the suspended mass is m = 2.00 kg?

Tension is maintained in a string as in Figure P13.57. The observed wave speed is v =24.0 m/s
when the suspended mass is m = 3.00 kg.
(a) What is the mass per unit length of the string?
(b) (b) What is the wave speed when the suspended mass is m = 2.00 kg

A boat oscillates up-and-down on the water with a frequency of 0.25Hz. How long does it take for the boat to make 5 complete oscillations?

An object undergoes simple harmonic motion with the time period of 2s and amplitude 0.5 m. At time t=0 the displacement of the object is a maximum. What is the displacement of the object from the equalibrium position at time t=1.5 s?

How to convert 3.6x10^-10 J to electron volts? detailed please, step by step.

A coil having an inductance of 6 H and an unknown resistance is connected in series with 
a resistor of 10 Ω to a 120 V dc supply. The time constant of the circuit is 300 ms. When 
steady state conditions have been reached, the supply is replaced instantaneously by a shortcircuit. Determine the resistance of the coil, the current flowing in the circuit one second 
after the shorting link has been placed in the circuit, and the time taken for the current to 
fall to 10% of its initial value

calculate the energy equivalent of 0.35 u, step by step please

A speaker is rated at 200W and creates a sound waves spherically around it. Determine the intensity of the sound waves at the distance of 1.0m in front of the speaker.

Sandy invest 1500$ into an account 3.5% interest compounded quart key how much money will be in the account after 8 years

4.1 The current in an ac circuit at any time 𝑡 seconds is given by: 𝑖(𝑡) = 120 sin(100𝜋𝑡 +
0.36) amperes. Determine:
4.1.1 The peak value, the periodic time, the frequency and phase angle relative to
120 sin(100𝜋𝑡). 
4.1.2 The value of the current when 𝑡 = 0. 
4.1.3 The time when the current first reaches 60 A. 
4.1.4 The time when the current is first at maximum. 

Suppose that a and b vary inversely and that b=5/3 when a=9. Write a function that models the inverse variation.

a) b = 5/3a

b) b = 15/a

c) b = 5/3a

d) b = 5/27a

I know that c is the correct answer, please explain why....

A coil having an inductance of 6 H and an unknown resistance is connected in series with 
a resistor of 10 Ω to a 120 V dc supply. The time constant of the circuit is 300 ms. When 
steady state conditions have been reached, the supply is replaced instantaneously by a short-circuit. Determine the resistance of the coil, the current flowing in the circuit one second after the shorting link has been placed in the circuit, and the time taken for the current to fall to 10% of its initial value.