Xian

A 2.4kg ball falling vertically hits the floor with a speed of 2.5m/s and rebounds with a speed of 1.5m/s. What is the impulse exerted on the floor?

A rifle with a weight of 20N fores a 5.0g bullet with a speed of 300m/s. (a) Find the recoil speed of the riffle (b) If a 700-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and the rifle. Please show work. Thank you!

A wheel with a radius of 1.5m rotates at uniform angular speed. If a point on the rim of the wheel has a centripetal acceleration of 1.2 m/s/s whats the points tangential speed?

a 5.0 kg mass attached to the end of a string swings in a vertical circle (radius 2m) when the mass is at its lowest point on the circle the speed of the mass is 12 m/s. What is the tension of the string at this point?

What is the maximum number of points of intersection of two different lines and three different circles in the same plane?

A 5 inch by 8 inch rectangle is enlarged to a similar rectangle whose smallest side measures 9 inches. What is the length in inches of the diagonal of the enlarged rectangle?

A bicycle has a 100 cm diameter wheel. If you ride on and around a circle with a 10 km diameter 12 times, how many revolutions does the wheel make?

In triangle MABC, D bisects side BC, G bisects side AB, and the points E and F trisect side AC. What is the area of the shaded polygon, if the area of MABC is 108?

Find the real number a for which the lines −4x+ 3y = 7 and ax− 2y = 4 will be perpendicular.

Find an equation for the perpendicular bisector of the line segment connecting the points (-2, 5) and (3, -7).

The surface area and the volume of a sphere are both 3 digit integers times π. If r is the radius of the sphere, how many integral values can be found for r?

The method of standard additions was used to determine nitrite in a soil sample. A 1.00-mL portions of the soil extract sample was transferred to four 25-mL volumetric flasks. To each flask, increment volumes of a 1.00 x10-3M nitrite wasadded according to...

Could you please explain how you got to your answer?

Attention, s'il vous plait

Je vais attendre pour mon/ma ami(e) a venir. Future tense for "I am going to wait" is either... -Je vais attendre...............or -J'attendrai

there is supposed to be an accent on the "a" by the way...

-J'ai besoin un crayon et un feuille de papier. -Avez-vous besoin un livre ou un cahier? -J'ai un dictionaire mais j'ai besoin un calculatrice.

vol. of standard nitrite added, mL 5.00 10.00 15.00 20.00 25.00 Absorbance 0.079 0.161 0.236 0.318 0.403

Sorry it's quite confusing. Is your explanation similar to this video? around 8:37 minutes youtu(dot)be/rllHziqWlgU

82-29-18=35 85-35-29=18 the answer is 35.