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Questions in physics

[Done] THE HEIGHT (IN METERS) OF A PROJECTILE SHOT VERTICALLY UPWARD FROM A POINT 5.5 M ABOVE GROUND LEVEL WITH AN INITIAL VELOCITY OF $25.48 M / S$ [tex]h=5.5+25.48 t-4.9 t^2[/tex] IS AFTER T SECONDS. A) WHEN DOES THE PROJECTILE REACH ITS MAXIMUM HEIGHT? B) WHAT IS THE MAXIMUM HEIGHT?

[Done] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Done] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Done] Select the best answer for the question. An object with a mass of 120 kilograms is moving at a velocity of 60 m/s. What's its momentum? A. 2 kg-m/s B. 7,200 kg-m/s C. 0.5 kg-m/s D. 3,600 kg-m/s

[Done] Ohm's law is V=IR, power is P=IV. In this question, the voltage powering a circuit is the due date month while the current is the due date day. For example, if the due date is 7/2 then the circuit has 7 Volts with 2 Amps for voltage and current, respectively. Do not use 7 Volts and 2 Amps unless the due date is 7/2. Be sure to include units in responses. 1) Write the voltage and current based on due date as described above. 2) Given the voltage and current in part 1) what is the resistance of the circuit? 3) What is the power exhibited in this circuit? (V-A would be units of Watts)

[Done] For hand and arm protection from electrical hazards, what should be used? A. Plastic gloves and sleeves B. Leather gloves and sleeves C. Rubber gloves and sleeves D. Cotton gloves and sleeves

[Done] A liquid that occupies a volume of 9.0 L has a mass of 7.2 kg. What is the density of the liquid in kg/L? density = [?] kg / L Record your answer to the hundredths place.

[Done] The position function of a particle is given by [tex]$s=t^3-10.5 t^2-2 t, t \geq 0$[/tex]. When does the particle reach a velocity of [tex]$52 M / s$[/tex]? The particle reaches a velocity of [tex]$52 M / s$[/tex] when [tex]$t=$[/tex] _____ seconds.

[Done] An SUV is traveling at a speed of $18 m / s$. If the SUV has a mass of $1,550 kg$, what force must be applied to stop it in 8 seconds? A. -2.25 N B. $-2,700.0 N$ C. $-3,487.5 N$ D. $-4,030.7 N$

[Done] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?