12,727 Answered Questions for the topic physics

Physics

11/03/22

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris.
The shell had an initial speed of 2.12 km/s at an initial inclination of 78.7 ◦ to the horizontal. The acceleration of gravity is 9.8 m/s 2 . -How far away did the shell hit? -How long was it in... more
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Physics

11/03/22

A projectile is fired upward at an angle of 30˚ with the horizontal from the top of a tower 35 m high above a level ground.

Find the range on the horizontal plane will the ball hit the ground after 25 seconds
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Physics

11/03/22

At a time of 10 s after being fired, a cannonball strikes a point 500 m horizontally and 100 m vertically above the point of launch.
1.With what initial velocity was the cannonball launched?2. What maximum height was attained by the ball?3. What is the direction of the ball’s velocity just before it strikes the given point?
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Physics

11/02/22

A problem using Newton's Second Law of Motion
A 4.00-kg object has a velocity of 3.00i m/s at one instant. Eight seconds later, its velocity has increased to (8.00i + 10.0j) m/s. Assuming the object was subject to a constant total force, find... more
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Physics

11/01/22

Balancing equations C2H6 + O2 => 3H2O + 2CO2
chemical balance this equation C2H6 + O2 => 3H2O + 2CO2
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Physics

11/01/22

vector magnitude and angle
A)Determine the magnitude of the sum of the three vectors V⃗ 1=8.0i^−9.0j^,V⃗ 2=i^+j^V→1=8.0i^−9.0j^,V→2=i^+j^, and V⃗ 3=−2.0i^+5.0j^V→3=−2.0i^+5.0j^.b)Determine the angle (in degrees) of the sum... more
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Physics

11/01/22

what is the difference between current and electricity?
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Physics

10/31/22

Two people are pulling on a sign with strings.
two people (person A and B) are pulling on a sign with strings. Person A is pulling with a force of 5N at an angle of 100° from the positive x-axis and person B is pulling with a force of 2N at an... more
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Physics

10/30/22

Find the gradients of the following functions: (a) f (x, y, z) = x2 + y3 + z4. (b)
Find the gradients of the following functions:(a) f (x, y, z) = x2 + y3 + z4.(b)
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Physics

10/29/22

Physic Normal Forces
Mountain goats can easily scale slopes angled at 60° from horizontal. What are the normal force and the static friction force acting on a mountain goat that weighs 900 N and is standing on such a... more
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Physics

10/29/22

A person stands directly in front of two speakers
A person stands directly in front of two speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 6.65 m from one of... more
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Physics

10/29/22

In a student laboratory exercise, the wavelength of a 48,300 Hz ultrasound wave is measured to be 0.716 cm. Find the air temperature (in K).
In a student laboratory exercise, the wavelength of a 48,300 Hz ultrasound wave is measured to be 0.716 cm. Find the air temperature (in K).
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Physics

10/29/22

Two children stretch a jump rope

Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 4.3 m long, its mass is 0.56 kg, and the force exerted on it by the children is 35 N.(a)What is... more
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Physics

10/28/22

Physics: Gravity

Diwata-1 (aka PHL-Microstat-1) was launched to the International Space Station on March 23, 2016. It was the first Philippine microsatellite and the first satellite built and designed by Filipinos.... more
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Physics

10/28/22

: Rotational Equilibrium and Rotational Dynamics
You turned on your classroom ceiling fan at its lowest setting. You measured that the rotation is 250 rev/min. When adjusted to its maximum setting, the speed increases to 450 rev/min in 15 s. (a)... more
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Physics

10/28/22

Vctors and direction
A small boat is being towed at constant speed along canalsin opposite sides pulling with equal forces of 1000N at equal angles of rope attached to the boat = 60°Calculate the force each man puts... more
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Physics

10/28/22

Vectors and scalars
What is the northerly component of the wind blowing at 15m/s from the south east
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Physics

10/27/22

Ultrasound probes can resolve structural details with sizes

Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of the ultrasound waves themselves. What is the size of the smallest feature observable in human... more
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Physics

10/27/22

Find the speed of the car before the collision.
An aggressive driver of a car moving west runs a red light. He collides in the middle of the intersection with an SUV that was moving north at 17.3 m/s. The two vehicles smash together and move at... more
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Physics

10/26/22

A football player runs down a field for 26 m, the turns right at 17 degrees to run another 15 m. What is the magnitude of his total displacement and the angle he runs?
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Physics

10/26/22

A ball thrown vertically upward is caught by the thrower after 1.63 s. Find the maximum height the ball reaches. he acceleration of gravity is 9.8 m/s

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Physics

10/26/22

another scheme to catch the roadrunner has failed
a safe falls from rest from the top of a 36.4 m high cliff toward wiley coyote, who is standing at the base. wiley first notices the safe after it has fallen 10.5 m. how long does he have to get... more
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10/25/22

Find the magnitude and direction of the acceleration of a 500 kg elevator supported by a cable with a tension of 3000 N.
Solve a numerical "elevator problem" for the tension of an elevator cable or the acceleration of an elevator.
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10/25/22

A 3 kg object is sliding to the left on a surface with a coefficient of friction of 0.2 at an initial velocity of 15 m/s. Determine the magnitude and direction of the acceleration of this object.
Calculate the acceleration of an object sliding on a flat rough surface (meaning there is friction).
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10/25/22

An elevator is descending at a velocity of -2 m/s with an acceleration of +3.0 m/s^2 .

In this "elevator problem" with known velocity and acceleration, you must construct a free-body diagram of the elevator or the person inside and state whether the velocity is increasing or decreasing. more
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