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An electric motor rotating a workshop grinding wheel at a rate of   rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.00 rad/s^2 How long does it take for the grinding wheel to stop?2

When you take your 1200 kg car out for a spin, you go around a corner of radius 57 m with a speed of 15 m/s. The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static friction?

Identify an advertisement, film, or program produced since 2022 that you recently watched. As you think of it, discuss how media representation plays a role in that piece. What underlying ideologies and values are being conveyed? What effect do these media representations have on our perceptions of reality? Provide a hyperlink to the material being discussed where possible.

On a marimba, the wooden bar that sounds a tone when struck vibrates in a transverse standing wave having three antinodes and two nodes. The lowest-frequency note is  , produced by a bar  long.

(a) Find the speed of transverse waves on the bar.

(b) A resonant pipe suspended vertically below the canter of the bar enhances the loudness of the emitted sound. If the pipe is open at the top end only, what length of the pipe is required to resonate with the bar in part (a)? 

An electromagnetic wave has a magnetic field given by

A) In which direction is the wave travelling?

B) What is the frequency of the wave?

a 1000kg car is picking up speed as it goes around a horizontal curve whose radius is 150 m. When the car reaches 30 m/s the driver notices that the car begins to skid sideways. What is the coefficient of static friction between the tires and the road?

A curve in a road forms part of a horizontal circle. As a

car goes around it at constant speed 14.0 m/s, the total

force on the driver has magnitude 130 N. What is the

total vector force on the driver if the speed is 18.0 m/s

instead?

Calculate the root mean square velocity and kinetic energy of at 298 K. 

Rank these three halogens with respect to their rate of effusion.

What is the topology?

Examine the following cartoon. What does it suggest about U.S. foreign policy when it comes to Iran and Israel?

What is photosynthesis?

Tell me the gravity of moon