Answers created by Dang Thi ThanhHoa

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You kick a ball with a speed of 4 m/s at an angle of 10°. How far away does the ball land?
What is the final temperature after 840 J is absorbed by 10.0 g of water at 25°C?
A $0.5 k g$ $0.5kg$ rubber ball is thrown straight up into the air. At a height of $20 m$ $20m$ above the ground, it is travelling at $15 \frac{m}{s}$ $15m/s$ . How do you answer the following questions?
How do you find the midpoint of A (-3,-2) and B (5,-2)?
Two charges of $- 4 C$ $-4 C$ and $- 2 C$ $-2 C$ are positioned on a line at points $- 1$ $-1$ and $14$ $14$ , respectively. What is the net force on a charge of $- 2 C$ $-2 C$ at $1$ $1$ ?
An object travels North at $5 \frac{m}{s}$ $5 m/s$ for $3 s$ $3 s$ and then travels South at $1 \frac{m}{s}$ $1 m/s$ for $4 s$ $4 s$ . What are the object's average speed and velocity?
An object is at rest at $(3, 8, 8)$ $(3 ,8 ,8 )$ and constantly accelerates at a rate of $\frac{7}{5} \frac{m}{s^{2}}$ $7/5 m/s^2$ as it moves to point B. If point B is at $(2, 9, 5)$ $(2 ,9 ,5 )$ , how long will it take for the object to reach point B? Assume that all coordinates are in meters.
A container with a volume of $12 L$ $12 L$ contains a gas with a temperature of $150^{o} C$ $150^o C$ . If the temperature of the gas changes to $620^{o} K$ $620 ^o K$ without any change in pressure, what must the container's new volume be?
A charge of $36 C$ $36 C$ passes through a circuit every $6 s$ $6 s$ . If the circuit can generate $9 W$ $9 W$ of power, what is the circuit's resistance?
How do you find the local max and min for $f (x) = - sin x - cos x$ $f(x)=-sinx-cosx$ ?
Some very hot rocks have a temperature of $340^{o} C$ $340 ^o C$ and a specific heat of $160 \frac{J}{K g \cdot K}$ $160 J/(Kg*K)$ . The rocks are bathed in $72 L$ $72 L$ of boiling water. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?
How do you solve $\frac{2}{3} (12 - x) > 4$ $2/3(12-x)>4$ ?
The kinetic energy of an object with a mass of $3 k g$ $3 kg$ constantly changes from $60 J$ $60 J$ to $270 J$ $270 J$ over $8 s$ $8 s$ . What is the impulse on the object at $5 s$ $5 s$ ?
The gas inside of a container exerts $26 P a$ $26 Pa$ of pressure and is at a temperature of $220^{o} K$ $220 ^o K$ . If the pressure in the container changes to $54 P a$ $54 Pa$ with no change in the container's volume, what is the new temperature of the gas?
An object with a mass of $8 k g$ $8 kg$ is revolving around a point at a distance of $1 m$ $1 m$ . If the object is making revolutions at a frequency of $12 H z$ $12 Hz$ , what is the centripetal force acting on the object?
An object with a mass of $7 k g$ $7 kg$ is on a ramp at an incline of $\frac{π}{12}$ $pi/12$ . If the object is being pushed up the ramp with a force of $4 N$ $4 N$ , what is the minimum coefficient of static friction needed for the object to remain put?
How do you divide $\frac{1 - 2 i}{1 - 3 i}$ $(1-2i)/(1-3i)$ in trigonometric form?