1- An object is rotating in a uniform circular motion. What can you say about:

a- Its angular velocity,

b- Its speed,

c- Its velocity,

d- Its acceleration.

e- periodic time.

f- having good tires in your car is very important, why?

I need answer asap

A 0.60 kg mass sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (with k = 650 N/m) whose other end is fixed. The mass has a kinetic energy of 11.0 J as it passes through its equilibrium position (the point at which the spring force is zero).

A. At what rate is the spring doing work on the mass as the mass passes through its equilibrium position?

B. At what rate is the spring doing work on the mass when the spring is compressed 0.092 m and the mass is moving away from the equilibrium position?

An object rotates according to the following expression: θ(t) = 2.3t3 – 2t2 + 0.5t with θ in radians and time in seconds.

Find the average angular speed from t = 0 to t = 2 seconds.

Find the instantaneous angular speed of the object at t = 2 seconds.

Find the average angular acceleration from t = 0 to t = 2 seconds.

Find the instantaneous angular acceleration of the object at t = 2 seconds.

If the temperature stayed the same but the dew point decreased, would the lifted condensation level (LCL) height increase or decrease? (ii) If the temperature decreased, but the dew point stayed the same, would the LCL height increase or decrease? (iii) Based on your answers above, how does relative humidity relate to the LCL height? Explain your answer.

An experiment was performed to determine the efficiency of a transformer. A coil is placed into another coil, and a steel bar is placed on the inside of both coils.

f (efficiency) = V1*N2 / V2*N1

Suppose we ignore the possibility of someone having miscounted the number of turns. Why might "1 turn" (or, perhaps, "1/2 turn") still make sense as an uncertainty on the number of turns?

Please explain the origin and evolution of the Universe. Start from the Big bang, going through the critical moments for creations of particles, stars and the Solar system. Please try to include the following key words: (a) The Big Bang, (b) Inflation, (c) Spontaneous Symmetry Breaking, (d) Quarks and Leptons, (e) Baryogenesis, (f) Cosmic Microwave Background, (g) Dark matter, (h) Dark energy, (i) Formation of stars, (j) Fate of the Universe. Underline the key words. Do not forget to include the times from the Big bang for the important epochs.    

A string of length L vibrates at its fundamental frequency. The amplitude at a point 1/4L from one end is 5.80cm .

-What is the amplitude of each of the traveling waves that form this standing wave?

Thanks in Advance!!

Write a paragraph of synthesis on how coefficient of static and kinetic plays an important role in determining the price of certain goods that we purchase? [Example: Think about why some running shoes/sneakers are very expensive]. Provide research links

Two 460 g blocks of wood are 2.0 m apart on a frictionless table. A 9.0 g bullet is fired at 420 m/s toward the blocks. It passes all the way through the first block, then embeds itself in the second block. The speed of the first block immediately afterward is 5.2 m/s .

What is the speed of the second block after the bullet stops?

Two charges each of magnitude q = 3 μC are situated at (x,y) = (1m,0) and (x,y) = (0,1m) respectively. The magnitude of the electric field at (x,y) = (0,0), is

Find the energy of an electron in the n = 2 state of hydrogen.
eV

If this electron undergoes a transition to the ground state, what is the energy, in electron-volts, of the photon that is emitted?
eV

You dig a hole in the ground, removing a volume 0.87 m3 of earth. If the density of the earth is 5044 kg/m3 calculate the weight of the earth removed in N, to 2 sf.

5. A sandbag is dropped from a hot air balloon that is 315 m above the ground. When the sandbag is dropped, the balloon is rising at 11 m/s. Find (a) the maximum height reached by the bag, (b) its position (relative to the ground) and velocity 4.3 s after it is released, and (c) when the bag hits the ground. PLEASE GO STEP BY STEP AND WRITE THE EQAUTION SO I UNDERSTAND HOW YOU GOT TO THE SOULTION! :) I AM TRYING TO LEARN THE INFO!

At time t=0 a grinding wheel has an angular velocity of 29.0 rad/s . It has a constant angular acceleration of 29.0 rad/s² until a circuit breaker trips at time t = 2.30 s . From then on, the wheel turns through an angle of 433 rad as it coasts to a stop at constant angular deceleration.

A) Through what total angle did the wheel turn between t=0 and the time it stopped?

Express your answer in radians.

B) At what time does the wheel stop?

Express your answer in seconds.

C) What was the wheel's angular acceleration as it slowed down?

Express your answer in rad/s².

An object at rest explodes into three fragments. The figure shows the momentum vectors of two of the fragments:

• vector P1 is directed along the p_x axis and has a magnitude of 67.0 kg m/s.
• vector P2 is at an angle of 50.0° measured counterclockwise from the positive p_x axis and has a magnitude of 92.0 kg m/s.

What are the p_x and p_y components of the momentum of the third fragment?